handle projections with regions
This commit is contained in:
Niko Matsakis
parent
3a5842afe1
commit
3fcb13ae45
14 changed files with 1757 additions and 101 deletions
68
src/test/ui/nll/ty-outlives/projection-no-regions-closure.rs
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68
src/test/ui/nll/ty-outlives/projection-no-regions-closure.rs
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@ -0,0 +1,68 @@
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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// compile-flags:-Znll -Zborrowck=mir -Zverbose
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// Tests closures that propagate an outlives relationship to their
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// creator where the subject is a projection with no regions (`<T as
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// Iterator>::Item`, to be exact).
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#![allow(warnings)]
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#![feature(dyn_trait)]
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#![feature(rustc_attrs)]
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trait Anything { }
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impl<T> Anything for T { }
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fn with_signature<'a, T, F>(x: Box<T>, op: F) -> Box<dyn Anything + 'a>
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where F: FnOnce(Box<T>) -> Box<dyn Anything + 'a>
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{
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op(x)
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}
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#[rustc_regions]
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fn no_region<'a, T>(x: Box<T>) -> Box<dyn Anything + 'a>
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where
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T: Iterator,
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{
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with_signature(x, |mut y| Box::new(y.next()))
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//~^ WARNING not reporting region error due to -Znll
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//~| ERROR failed type test
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}
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#[rustc_regions]
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fn correct_region<'a, T>(x: Box<T>) -> Box<dyn Anything + 'a>
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where
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T: 'a + Iterator,
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{
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with_signature(x, |mut y| Box::new(y.next()))
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}
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#[rustc_regions]
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fn wrong_region<'a, 'b, T>(x: Box<T>) -> Box<dyn Anything + 'a>
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where
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T: 'b + Iterator,
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{
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with_signature(x, |mut y| Box::new(y.next()))
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//~^ WARNING not reporting region error due to -Znll
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//~| ERROR failed type test
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}
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#[rustc_regions]
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fn outlives_region<'a, 'b, T>(x: Box<T>) -> Box<dyn Anything + 'a>
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where
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T: 'b + Iterator,
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'b: 'a,
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{
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with_signature(x, |mut y| Box::new(y.next()))
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}
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fn main() {}
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157
src/test/ui/nll/ty-outlives/projection-no-regions-closure.stderr
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157
src/test/ui/nll/ty-outlives/projection-no-regions-closure.stderr
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@ -0,0 +1,157 @@
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warning: not reporting region error due to -Znll
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--> $DIR/projection-no-regions-closure.rs:36:31
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36 | with_signature(x, |mut y| Box::new(y.next()))
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| ^^^^^^^^^^^^^^^^^^
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warning: not reporting region error due to -Znll
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--> $DIR/projection-no-regions-closure.rs:54:31
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|
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54 | with_signature(x, |mut y| Box::new(y.next()))
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| ^^^^^^^^^^^^^^^^^^
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note: External requirements
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--> $DIR/projection-no-regions-closure.rs:36:23
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|
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36 | with_signature(x, |mut y| Box::new(y.next()))
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: defining type: DefId(0/1:15 ~ projection_no_regions_closure[317d]::no_region[0]::{{closure}}[0]) with closure substs [
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'_#1r,
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T,
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i32,
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extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<Anything + '_#2r>
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]
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= note: number of external vids: 3
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= note: where <T as std::iter::Iterator>::Item: '_#2r
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note: External requirements
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--> $DIR/projection-no-regions-closure.rs:46:23
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46 | with_signature(x, |mut y| Box::new(y.next()))
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: defining type: DefId(0/1:18 ~ projection_no_regions_closure[317d]::correct_region[0]::{{closure}}[0]) with closure substs [
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'_#1r,
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T,
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i32,
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extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<Anything + '_#2r>
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]
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= note: number of external vids: 3
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= note: where <T as std::iter::Iterator>::Item: '_#2r
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note: External requirements
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--> $DIR/projection-no-regions-closure.rs:54:23
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|
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54 | with_signature(x, |mut y| Box::new(y.next()))
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: defining type: DefId(0/1:22 ~ projection_no_regions_closure[317d]::wrong_region[0]::{{closure}}[0]) with closure substs [
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'_#1r,
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'_#2r,
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T,
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i32,
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extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<Anything + '_#3r>
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]
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= note: number of external vids: 4
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= note: where <T as std::iter::Iterator>::Item: '_#3r
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note: External requirements
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--> $DIR/projection-no-regions-closure.rs:65:23
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65 | with_signature(x, |mut y| Box::new(y.next()))
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: defining type: DefId(0/1:26 ~ projection_no_regions_closure[317d]::outlives_region[0]::{{closure}}[0]) with closure substs [
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'_#1r,
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'_#2r,
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T,
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i32,
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extern "rust-call" fn((std::boxed::Box<T>,)) -> std::boxed::Box<Anything + '_#3r>
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]
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= note: number of external vids: 4
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= note: where <T as std::iter::Iterator>::Item: '_#3r
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error: failed type test: TypeTest { generic_kind: ProjectionTy { substs: Slice([T]), item_def_id: DefId(2/0:1697 ~ core[2633]::iter[0]::iterator[0]::Iterator[0]::Item[0]) }, lower_bound: '_#4r, point: bb0[5], span: $DIR/projection-no-regions-closure.rs:36:23: 36:49, test: IsOutlivedByAnyRegionIn(['_#2r]) }
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--> $DIR/projection-no-regions-closure.rs:36:23
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36 | with_signature(x, |mut y| Box::new(y.next()))
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^
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note: No external requirements
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--> $DIR/projection-no-regions-closure.rs:32:1
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32 | / fn no_region<'a, T>(x: Box<T>) -> Box<dyn Anything + 'a>
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33 | | where
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34 | | T: Iterator,
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35 | | {
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... |
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38 | | //~| ERROR failed type test
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39 | | }
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| |_^
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|
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= note: defining type: DefId(0/0:6 ~ projection_no_regions_closure[317d]::no_region[0]) with substs [
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'_#1r,
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T
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]
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note: No external requirements
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--> $DIR/projection-no-regions-closure.rs:42:1
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42 | / fn correct_region<'a, T>(x: Box<T>) -> Box<dyn Anything + 'a>
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43 | | where
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44 | | T: 'a + Iterator,
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45 | | {
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46 | | with_signature(x, |mut y| Box::new(y.next()))
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47 | | }
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| |_^
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= note: defining type: DefId(0/0:7 ~ projection_no_regions_closure[317d]::correct_region[0]) with substs [
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'_#1r,
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T
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]
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error: failed type test: TypeTest { generic_kind: ProjectionTy { substs: Slice([T]), item_def_id: DefId(2/0:1697 ~ core[2633]::iter[0]::iterator[0]::Iterator[0]::Item[0]) }, lower_bound: '_#6r, point: bb0[5], span: $DIR/projection-no-regions-closure.rs:54:23: 54:49, test: IsOutlivedByAnyRegionIn(['_#2r, '_#3r]) }
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--> $DIR/projection-no-regions-closure.rs:54:23
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54 | with_signature(x, |mut y| Box::new(y.next()))
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^
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note: No external requirements
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--> $DIR/projection-no-regions-closure.rs:50:1
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50 | / fn wrong_region<'a, 'b, T>(x: Box<T>) -> Box<dyn Anything + 'a>
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51 | | where
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52 | | T: 'b + Iterator,
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53 | | {
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... |
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56 | | //~| ERROR failed type test
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57 | | }
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| |_^
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|
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= note: defining type: DefId(0/0:8 ~ projection_no_regions_closure[317d]::wrong_region[0]) with substs [
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'_#1r,
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'_#2r,
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T
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]
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note: No external requirements
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--> $DIR/projection-no-regions-closure.rs:60:1
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60 | / fn outlives_region<'a, 'b, T>(x: Box<T>) -> Box<dyn Anything + 'a>
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61 | | where
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62 | | T: 'b + Iterator,
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63 | | 'b: 'a,
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64 | | {
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65 | | with_signature(x, |mut y| Box::new(y.next()))
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66 | | }
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| |_^
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|
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= note: defining type: DefId(0/0:9 ~ projection_no_regions_closure[317d]::outlives_region[0]) with substs [
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'_#1r,
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'_#2r,
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T
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]
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error: aborting due to 2 previous errors
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@ -8,7 +8,7 @@
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// compile-flags:-Znll -Zborrowck=mir
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// compile-flags:-Znll -Zborrowck=mir -Zverbose
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#![allow(warnings)]
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#![feature(dyn_trait)]
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@ -1,23 +1,23 @@
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warning: not reporting region error due to -Znll
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--> $DIR/projection-fn.rs:24:5
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--> $DIR/projection-no-regions-fn.rs:24:5
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|
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24 | Box::new(x.next())
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| ^^^^^^^^^^^^^^^^^^
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warning: not reporting region error due to -Znll
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--> $DIR/projection-fn.rs:40:5
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--> $DIR/projection-no-regions-fn.rs:40:5
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|
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40 | Box::new(x.next())
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| ^^^^^^^^^^^^^^^^^^
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error: failed type test: TypeTest { generic_kind: ProjectionTy { substs: Slice([T]), item_def_id: DefId(2/0:1695 ~ core[2633]::iter[0]::iterator[0]::Iterator[0]::Item[0]) }, lower_bound: '_#4r, point: bb5[0], span: $DIR/projection-fn.rs:24:5: 24:23, test: IsOutlivedByAnyRegionIn(['_#2r]) }
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--> $DIR/projection-fn.rs:24:5
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error: failed type test: TypeTest { generic_kind: ProjectionTy { substs: Slice([T]), item_def_id: DefId(2/0:1697 ~ core[2633]::iter[0]::iterator[0]::Iterator[0]::Item[0]) }, lower_bound: '_#4r, point: bb5[0], span: $DIR/projection-no-regions-fn.rs:24:5: 24:23, test: IsOutlivedByAnyRegionIn(['_#2r]) }
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--> $DIR/projection-no-regions-fn.rs:24:5
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|
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24 | Box::new(x.next())
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| ^^^^^^^^^^^^^^^^^^
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error: failed type test: TypeTest { generic_kind: ProjectionTy { substs: Slice([T]), item_def_id: DefId(2/0:1695 ~ core[2633]::iter[0]::iterator[0]::Iterator[0]::Item[0]) }, lower_bound: '_#5r, point: bb5[0], span: $DIR/projection-fn.rs:40:5: 40:23, test: IsOutlivedByAnyRegionIn(['_#2r, '_#3r]) }
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--> $DIR/projection-fn.rs:40:5
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error: failed type test: TypeTest { generic_kind: ProjectionTy { substs: Slice([T]), item_def_id: DefId(2/0:1697 ~ core[2633]::iter[0]::iterator[0]::Iterator[0]::Item[0]) }, lower_bound: '_#5r, point: bb5[0], span: $DIR/projection-no-regions-fn.rs:40:5: 40:23, test: IsOutlivedByAnyRegionIn(['_#2r, '_#3r]) }
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--> $DIR/projection-no-regions-fn.rs:40:5
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|
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40 | Box::new(x.next())
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| ^^^^^^^^^^^^^^^^^^
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106
src/test/ui/nll/ty-outlives/projection-one-region-closure.rs
Normal file
106
src/test/ui/nll/ty-outlives/projection-one-region-closure.rs
Normal file
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@ -0,0 +1,106 @@
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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Test cases where we constrain `<T as Anything<'b>>::AssocType` to
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// outlive `'a` and there are no bounds in the trait definition of
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// `Anything`. This means that the constraint can only be satisfied in two
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// ways:
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//
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// - by ensuring that `T: 'a` and `'b: 'a`, or
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// - by something in the where clauses.
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//
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// As of this writing, the where clause option does not work because
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// of limitations in our region inferencing system (this is true both
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// with and without NLL). See `projection_outlives`.
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//
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// Ensuring that both `T: 'a` and `'b: 'a` holds does work (`elements_outlive`).
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// compile-flags:-Znll -Zborrowck=mir -Zverbose
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#![allow(warnings)]
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#![feature(dyn_trait)]
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#![feature(rustc_attrs)]
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use std::cell::Cell;
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trait Anything<'a> {
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type AssocType;
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}
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fn with_signature<'a, T, F>(cell: Cell<&'a ()>, t: T, op: F)
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where
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F: FnOnce(Cell<&'a ()>, T),
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{
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op(cell, t)
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}
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fn require<'a, 'b, T>(_cell: Cell<&'a ()>, _t: T)
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where
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T: Anything<'b>,
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T::AssocType: 'a,
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{
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}
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#[rustc_regions]
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fn no_relationships_late<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
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where
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T: Anything<'b>,
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{
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with_signature(cell, t, |cell, t| require(cell, t));
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//~^ WARNING not reporting region error due to -Znll
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//~| ERROR failed type test
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//~| ERROR free region `ReEarlyBound(0, 'b)` does not outlive free region `'_#2r`
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}
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#[rustc_regions]
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fn no_relationships_early<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
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where
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T: Anything<'b>,
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'a: 'a,
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{
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with_signature(cell, t, |cell, t| require(cell, t));
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//~^ WARNING not reporting region error due to -Znll
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//~| ERROR failed type test
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//~| ERROR free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
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}
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#[rustc_regions]
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fn projection_outlives<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
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where
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T: Anything<'b>,
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T::AssocType: 'a,
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{
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// This error is unfortunate. This code ought to type-check: we
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// are projecting `<T as Anything<'b>>::AssocType`, and we know
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// that this outlives `'a` because of the where-clause. However,
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// the way the region checker works, we don't register this
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// outlives obligation, and hence we get an error: this is because
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// what we see is a projection like `<T as
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// Anything<'?0>>::AssocType`, and we don't yet know if `?0` will
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// equal `'b` or not, so we ignore the where-clause. Obviously we
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// can do better here with a more involved verification step.
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with_signature(cell, t, |cell, t| require(cell, t));
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//~^ WARNING not reporting region error due to -Znll
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//~| ERROR failed type test
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//~| ERROR free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
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}
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#[rustc_regions]
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fn elements_outlive<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
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where
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T: Anything<'b>,
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T: 'a,
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'b: 'a,
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{
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with_signature(cell, t, |cell, t| require(cell, t));
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}
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fn main() {}
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194
src/test/ui/nll/ty-outlives/projection-one-region-closure.stderr
Normal file
194
src/test/ui/nll/ty-outlives/projection-one-region-closure.stderr
Normal file
|
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@ -0,0 +1,194 @@
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warning: not reporting region error due to -Znll
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--> $DIR/projection-one-region-closure.rs:56:39
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|
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56 | with_signature(cell, t, |cell, t| require(cell, t));
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| ^^^^^^^
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warning: not reporting region error due to -Znll
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--> $DIR/projection-one-region-closure.rs:68:39
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|
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68 | with_signature(cell, t, |cell, t| require(cell, t));
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| ^^^^^^^
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warning: not reporting region error due to -Znll
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--> $DIR/projection-one-region-closure.rs:90:39
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|
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90 | with_signature(cell, t, |cell, t| require(cell, t));
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| ^^^^^^^
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note: External requirements
|
||||
--> $DIR/projection-one-region-closure.rs:56:29
|
||||
|
|
||||
56 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:19 ~ projection_one_region_closure[317d]::no_relationships_late[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 3
|
||||
= note: where T: '_#2r
|
||||
= note: where '_#1r: '_#2r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-one-region-closure.rs:68:29
|
||||
|
|
||||
68 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:23 ~ projection_one_region_closure[317d]::no_relationships_early[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 4
|
||||
= note: where T: '_#3r
|
||||
= note: where '_#2r: '_#3r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-one-region-closure.rs:90:29
|
||||
|
|
||||
90 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:27 ~ projection_one_region_closure[317d]::projection_outlives[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 4
|
||||
= note: where T: '_#3r
|
||||
= note: where '_#2r: '_#3r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-one-region-closure.rs:103:29
|
||||
|
|
||||
103 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:31 ~ projection_one_region_closure[317d]::elements_outlive[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 4
|
||||
= note: where T: '_#3r
|
||||
= note: where '_#2r: '_#3r
|
||||
|
||||
error: failed type test: TypeTest { generic_kind: T/#1, lower_bound: '_#5r, point: bb0[5], span: $DIR/projection-one-region-closure.rs:56:29: 56:55, test: IsOutlivedByAnyRegionIn(['_#3r]) }
|
||||
--> $DIR/projection-one-region-closure.rs:56:29
|
||||
|
|
||||
56 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: free region `ReEarlyBound(0, 'b)` does not outlive free region `'_#2r`
|
||||
--> $DIR/projection-one-region-closure.rs:56:20
|
||||
|
|
||||
56 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-closure.rs:52:1
|
||||
|
|
||||
52 | / fn no_relationships_late<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
53 | | where
|
||||
54 | | T: Anything<'b>,
|
||||
55 | | {
|
||||
... |
|
||||
59 | | //~| ERROR free region `ReEarlyBound(0, 'b)` does not outlive free region `'_#2r`
|
||||
60 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:8 ~ projection_one_region_closure[317d]::no_relationships_late[0]) with substs [
|
||||
'_#1r,
|
||||
T
|
||||
]
|
||||
|
||||
error: failed type test: TypeTest { generic_kind: T/#2, lower_bound: '_#6r, point: bb0[5], span: $DIR/projection-one-region-closure.rs:68:29: 68:55, test: IsOutlivedByAnyRegionIn(['_#3r]) }
|
||||
--> $DIR/projection-one-region-closure.rs:68:29
|
||||
|
|
||||
68 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
|
||||
--> $DIR/projection-one-region-closure.rs:68:20
|
||||
|
|
||||
68 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-closure.rs:63:1
|
||||
|
|
||||
63 | / fn no_relationships_early<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
64 | | where
|
||||
65 | | T: Anything<'b>,
|
||||
66 | | 'a: 'a,
|
||||
... |
|
||||
71 | | //~| ERROR free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
|
||||
72 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:9 ~ projection_one_region_closure[317d]::no_relationships_early[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
error: failed type test: TypeTest { generic_kind: T/#2, lower_bound: '_#6r, point: bb0[5], span: $DIR/projection-one-region-closure.rs:90:29: 90:55, test: IsOutlivedByAnyRegionIn(['_#3r]) }
|
||||
--> $DIR/projection-one-region-closure.rs:90:29
|
||||
|
|
||||
90 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
|
||||
--> $DIR/projection-one-region-closure.rs:90:20
|
||||
|
|
||||
90 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-closure.rs:75:1
|
||||
|
|
||||
75 | / fn projection_outlives<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
76 | | where
|
||||
77 | | T: Anything<'b>,
|
||||
78 | | T::AssocType: 'a,
|
||||
... |
|
||||
93 | | //~| ERROR free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
|
||||
94 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:10 ~ projection_one_region_closure[317d]::projection_outlives[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-closure.rs:97:1
|
||||
|
|
||||
97 | / fn elements_outlive<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
98 | | where
|
||||
99 | | T: Anything<'b>,
|
||||
100 | | T: 'a,
|
||||
... |
|
||||
103 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
104 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:11 ~ projection_one_region_closure[317d]::elements_outlive[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
error: aborting due to 6 previous errors
|
||||
|
||||
|
|
@ -0,0 +1,106 @@
|
|||
// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
|
||||
// file at the top-level directory of this distribution and at
|
||||
// http://rust-lang.org/COPYRIGHT.
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
||||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
||||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
||||
// option. This file may not be copied, modified, or distributed
|
||||
// except according to those terms.
|
||||
|
||||
// Test cases where we constrain `<T as Anything<'b>>::AssocType` to
|
||||
// outlive `'a` and there is a unique bound in the trait definition of
|
||||
// `Anything` -- i.e., we know that `AssocType` outlives `'b`. In this
|
||||
// case, the best way to satisfy the trait bound is to show that `'b:
|
||||
// 'a`, which can be done in various ways.
|
||||
|
||||
// compile-flags:-Znll -Zborrowck=mir -Zverbose
|
||||
|
||||
#![allow(warnings)]
|
||||
#![feature(dyn_trait)]
|
||||
#![feature(rustc_attrs)]
|
||||
|
||||
use std::cell::Cell;
|
||||
|
||||
trait Anything<'a> {
|
||||
type AssocType: 'a;
|
||||
}
|
||||
|
||||
fn with_signature<'a, T, F>(cell: Cell<&'a ()>, t: T, op: F)
|
||||
where
|
||||
F: FnOnce(Cell<&'a ()>, T),
|
||||
{
|
||||
op(cell, t)
|
||||
}
|
||||
|
||||
fn require<'a, 'b, T>(_cell: Cell<&'a ()>, _t: T)
|
||||
where
|
||||
T: Anything<'b>,
|
||||
T::AssocType: 'a,
|
||||
{
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn no_relationships_late<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b>,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
//~^ WARNING not reporting region error due to -Znll
|
||||
//~| ERROR free region `ReEarlyBound(0, 'b)` does not outlive free region `'_#2r`
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn no_relationships_early<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b>,
|
||||
'a: 'a,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
//~^ WARNING not reporting region error due to -Znll
|
||||
//~| ERROR free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn projection_outlives<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b>,
|
||||
T::AssocType: 'a,
|
||||
{
|
||||
// This error is unfortunate. This code ought to type-check: we
|
||||
// are projecting `<T as Anything<'b>>::AssocType`, and we know
|
||||
// that this outlives `'a` because of the where-clause. However,
|
||||
// the way the region checker works, we don't register this
|
||||
// outlives obligation, and hence we get an error: this is because
|
||||
// what we see is a projection like `<T as
|
||||
// Anything<'?0>>::AssocType`, and we don't yet know if `?0` will
|
||||
// equal `'b` or not, so we ignore the where-clause. Obviously we
|
||||
// can do better here with a more involved verification step.
|
||||
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
//~^ WARNING not reporting region error due to -Znll
|
||||
//~| ERROR free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn elements_outlive<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b>,
|
||||
'b: 'a,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn one_region<'a, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'a>,
|
||||
{
|
||||
// Note that in this case the closure still propagates an external
|
||||
// requirement between two variables in its signature, but the
|
||||
// creator maps both those two region variables to `'a` on its
|
||||
// side.
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
fn main() {}
|
||||
|
|
@ -0,0 +1,204 @@
|
|||
warning: not reporting region error due to -Znll
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:48:39
|
||||
|
|
||||
48 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^
|
||||
|
||||
warning: not reporting region error due to -Znll
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:59:39
|
||||
|
|
||||
59 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^
|
||||
|
||||
warning: not reporting region error due to -Znll
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:80:39
|
||||
|
|
||||
80 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:48:29
|
||||
|
|
||||
48 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:19 ~ projection_one_region_trait_bound_closure[317d]::no_relationships_late[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 3
|
||||
= note: where '_#1r: '_#2r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:59:29
|
||||
|
|
||||
59 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:23 ~ projection_one_region_trait_bound_closure[317d]::no_relationships_early[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 4
|
||||
= note: where '_#2r: '_#3r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:80:29
|
||||
|
|
||||
80 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:27 ~ projection_one_region_trait_bound_closure[317d]::projection_outlives[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 4
|
||||
= note: where '_#2r: '_#3r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:91:29
|
||||
|
|
||||
91 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:31 ~ projection_one_region_trait_bound_closure[317d]::elements_outlive[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 4
|
||||
= note: where '_#2r: '_#3r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:103:29
|
||||
|
|
||||
103 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:34 ~ projection_one_region_trait_bound_closure[317d]::one_region[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 3
|
||||
= note: where '_#1r: '_#2r
|
||||
|
||||
error: free region `ReEarlyBound(0, 'b)` does not outlive free region `'_#2r`
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:48:20
|
||||
|
|
||||
48 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:44:1
|
||||
|
|
||||
44 | / fn no_relationships_late<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
45 | | where
|
||||
46 | | T: Anything<'b>,
|
||||
47 | | {
|
||||
... |
|
||||
50 | | //~| ERROR free region `ReEarlyBound(0, 'b)` does not outlive free region `'_#2r`
|
||||
51 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:8 ~ projection_one_region_trait_bound_closure[317d]::no_relationships_late[0]) with substs [
|
||||
'_#1r,
|
||||
T
|
||||
]
|
||||
|
||||
error: free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:59:20
|
||||
|
|
||||
59 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:54:1
|
||||
|
|
||||
54 | / fn no_relationships_early<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
55 | | where
|
||||
56 | | T: Anything<'b>,
|
||||
57 | | 'a: 'a,
|
||||
... |
|
||||
61 | | //~| ERROR free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
|
||||
62 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:9 ~ projection_one_region_trait_bound_closure[317d]::no_relationships_early[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
error: free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:80:20
|
||||
|
|
||||
80 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:65:1
|
||||
|
|
||||
65 | / fn projection_outlives<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
66 | | where
|
||||
67 | | T: Anything<'b>,
|
||||
68 | | T::AssocType: 'a,
|
||||
... |
|
||||
82 | | //~| ERROR free region `ReEarlyBound(1, 'b)` does not outlive free region `ReEarlyBound(0, 'a)`
|
||||
83 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:10 ~ projection_one_region_trait_bound_closure[317d]::projection_outlives[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:86:1
|
||||
|
|
||||
86 | / fn elements_outlive<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
87 | | where
|
||||
88 | | T: Anything<'b>,
|
||||
89 | | 'b: 'a,
|
||||
90 | | {
|
||||
91 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
92 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:11 ~ projection_one_region_trait_bound_closure[317d]::elements_outlive[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-closure.rs:95:1
|
||||
|
|
||||
95 | / fn one_region<'a, T>(cell: Cell<&'a ()>, t: T)
|
||||
96 | | where
|
||||
97 | | T: Anything<'a>,
|
||||
98 | | {
|
||||
... |
|
||||
103 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
104 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:12 ~ projection_one_region_trait_bound_closure[317d]::one_region[0]) with substs [
|
||||
'_#1r,
|
||||
T
|
||||
]
|
||||
|
||||
error: aborting due to 3 previous errors
|
||||
|
||||
|
|
@ -0,0 +1,99 @@
|
|||
// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
|
||||
// file at the top-level directory of this distribution and at
|
||||
// http://rust-lang.org/COPYRIGHT.
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
||||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
||||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
||||
// option. This file may not be copied, modified, or distributed
|
||||
// except according to those terms.
|
||||
|
||||
// Test cases where we constrain `<T as Anything<'b>>::AssocType` to
|
||||
// outlive `'static`. In this case, we don't get any errors, and in fact
|
||||
// we don't even propagate constraints from the closures to the callers.
|
||||
|
||||
// compile-flags:-Znll -Zborrowck=mir -Zverbose
|
||||
// must-compile-successfully
|
||||
|
||||
#![allow(warnings)]
|
||||
#![feature(dyn_trait)]
|
||||
#![feature(rustc_attrs)]
|
||||
|
||||
use std::cell::Cell;
|
||||
|
||||
trait Anything<'a> {
|
||||
type AssocType: 'static;
|
||||
}
|
||||
|
||||
fn with_signature<'a, T, F>(cell: Cell<&'a ()>, t: T, op: F)
|
||||
where
|
||||
F: FnOnce(Cell<&'a ()>, T),
|
||||
{
|
||||
op(cell, t)
|
||||
}
|
||||
|
||||
fn require<'a, 'b, T>(_cell: Cell<&'a ()>, _t: T)
|
||||
where
|
||||
T: Anything<'b>,
|
||||
T::AssocType: 'a,
|
||||
{
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn no_relationships_late<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b>,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn no_relationships_early<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b>,
|
||||
'a: 'a,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn projection_outlives<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b>,
|
||||
T::AssocType: 'a,
|
||||
{
|
||||
// This error is unfortunate. This code ought to type-check: we
|
||||
// are projecting `<T as Anything<'b>>::AssocType`, and we know
|
||||
// that this outlives `'a` because of the where-clause. However,
|
||||
// the way the region checker works, we don't register this
|
||||
// outlives obligation, and hence we get an error: this is because
|
||||
// what we see is a projection like `<T as
|
||||
// Anything<'?0>>::AssocType`, and we don't yet know if `?0` will
|
||||
// equal `'b` or not, so we ignore the where-clause. Obviously we
|
||||
// can do better here with a more involved verification step.
|
||||
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn elements_outlive<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b>,
|
||||
'b: 'a,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn one_region<'a, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'a>,
|
||||
{
|
||||
// Note that in this case the closure still propagates an external
|
||||
// requirement between two variables in its signature, but the
|
||||
// creator maps both those two region variables to `'a` on its
|
||||
// side.
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
fn main() {}
|
||||
|
|
@ -0,0 +1,155 @@
|
|||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-static-closure.rs:47:29
|
||||
|
|
||||
47 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:19 ~ projection_one_region_trait_bound_static_closure[317d]::no_relationships_late[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-static-closure.rs:56:29
|
||||
|
|
||||
56 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:23 ~ projection_one_region_trait_bound_static_closure[317d]::no_relationships_early[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-static-closure.rs:75:29
|
||||
|
|
||||
75 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:27 ~ projection_one_region_trait_bound_static_closure[317d]::projection_outlives[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-static-closure.rs:84:29
|
||||
|
|
||||
84 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:31 ~ projection_one_region_trait_bound_static_closure[317d]::elements_outlive[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-static-closure.rs:96:29
|
||||
|
|
||||
96 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:34 ~ projection_one_region_trait_bound_static_closure[317d]::one_region[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-static-closure.rs:43:1
|
||||
|
|
||||
43 | / fn no_relationships_late<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
44 | | where
|
||||
45 | | T: Anything<'b>,
|
||||
46 | | {
|
||||
47 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
48 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:8 ~ projection_one_region_trait_bound_static_closure[317d]::no_relationships_late[0]) with substs [
|
||||
'_#1r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-static-closure.rs:51:1
|
||||
|
|
||||
51 | / fn no_relationships_early<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
52 | | where
|
||||
53 | | T: Anything<'b>,
|
||||
54 | | 'a: 'a,
|
||||
55 | | {
|
||||
56 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
57 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:9 ~ projection_one_region_trait_bound_static_closure[317d]::no_relationships_early[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-static-closure.rs:60:1
|
||||
|
|
||||
60 | / fn projection_outlives<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
61 | | where
|
||||
62 | | T: Anything<'b>,
|
||||
63 | | T::AssocType: 'a,
|
||||
... |
|
||||
75 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
76 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:10 ~ projection_one_region_trait_bound_static_closure[317d]::projection_outlives[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-static-closure.rs:79:1
|
||||
|
|
||||
79 | / fn elements_outlive<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
80 | | where
|
||||
81 | | T: Anything<'b>,
|
||||
82 | | 'b: 'a,
|
||||
83 | | {
|
||||
84 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
85 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:11 ~ projection_one_region_trait_bound_static_closure[317d]::elements_outlive[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-one-region-trait-bound-static-closure.rs:88:1
|
||||
|
|
||||
88 | / fn one_region<'a, T>(cell: Cell<&'a ()>, t: T)
|
||||
89 | | where
|
||||
90 | | T: Anything<'a>,
|
||||
91 | | {
|
||||
... |
|
||||
96 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
97 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:12 ~ projection_one_region_trait_bound_static_closure[317d]::one_region[0]) with substs [
|
||||
'_#1r,
|
||||
T
|
||||
]
|
||||
|
||||
|
|
@ -0,0 +1,135 @@
|
|||
// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
|
||||
// file at the top-level directory of this distribution and at
|
||||
// http://rust-lang.org/COPYRIGHT.
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
||||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
||||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
||||
// option. This file may not be copied, modified, or distributed
|
||||
// except according to those terms.
|
||||
|
||||
// Test cases where we constrain `<T as Anything<'a, 'b>>::AssocType`
|
||||
// to outlive `'a` and there are two bounds in the trait definition of
|
||||
// `Anything` -- i.e., we know that `AssocType` outlives `'a` and
|
||||
// `'b`. In this case, it's not clear what is the best way to satisfy
|
||||
// the trait bound, and hence we propagate it to the caller as a type
|
||||
// test.
|
||||
|
||||
// compile-flags:-Znll -Zborrowck=mir -Zverbose
|
||||
|
||||
#![allow(warnings)]
|
||||
#![feature(dyn_trait)]
|
||||
#![feature(rustc_attrs)]
|
||||
|
||||
use std::cell::Cell;
|
||||
|
||||
trait Anything<'a, 'b> {
|
||||
type AssocType: 'a + 'b;
|
||||
}
|
||||
|
||||
fn with_signature<'a, T, F>(cell: Cell<&'a ()>, t: T, op: F)
|
||||
where
|
||||
F: FnOnce(Cell<&'a ()>, T),
|
||||
{
|
||||
op(cell, t)
|
||||
}
|
||||
|
||||
fn require<'a, 'b, 'c, T>(_cell: Cell<&'a ()>, _t: T)
|
||||
where
|
||||
T: Anything<'b, 'c>,
|
||||
T::AssocType: 'a,
|
||||
{
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn no_relationships_late<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b, 'c>,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
//~^ WARNING not reporting region error due to -Znll
|
||||
//~| ERROR failed type test
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn no_relationships_early<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b, 'c>,
|
||||
'a: 'a,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
//~^ WARNING not reporting region error due to -Znll
|
||||
//~| ERROR failed type test
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn projection_outlives<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b, 'c>,
|
||||
T::AssocType: 'a,
|
||||
{
|
||||
// This error is unfortunate. This code ought to type-check: we
|
||||
// are projecting `<T as Anything<'b>>::AssocType`, and we know
|
||||
// that this outlives `'a` because of the where-clause. However,
|
||||
// the way the region checker works, we don't register this
|
||||
// outlives obligation, and hence we get an error: this is because
|
||||
// what we see is a projection like `<T as
|
||||
// Anything<'?0>>::AssocType`, and we don't yet know if `?0` will
|
||||
// equal `'b` or not, so we ignore the where-clause. Obviously we
|
||||
// can do better here with a more involved verification step.
|
||||
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
//~^ WARNING not reporting region error due to -Znll
|
||||
//~| ERROR failed type test
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn elements_outlive1<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b, 'c>,
|
||||
'b: 'a,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn elements_outlive2<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b, 'c>,
|
||||
'c: 'a,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn two_regions<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b, 'b>,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
//~^ WARNING not reporting region error due to -Znll
|
||||
//~| ERROR free region `ReEarlyBound(0, 'b)` does not outlive free region `'_#2r`
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn two_regions_outlive<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'b, 'b>,
|
||||
'b: 'a,
|
||||
{
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
#[rustc_regions]
|
||||
fn one_region<'a, T>(cell: Cell<&'a ()>, t: T)
|
||||
where
|
||||
T: Anything<'a, 'a>,
|
||||
{
|
||||
// Note that in this case the closure still propagates an external
|
||||
// requirement between two variables in its signature, but the
|
||||
// creator maps both those two region variables to `'a` on its
|
||||
// side.
|
||||
with_signature(cell, t, |cell, t| require(cell, t));
|
||||
}
|
||||
|
||||
fn main() {}
|
||||
|
|
@ -0,0 +1,326 @@
|
|||
warning: not reporting region error due to -Znll
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:49:39
|
||||
|
|
||||
49 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^
|
||||
|
||||
warning: not reporting region error due to -Znll
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:60:39
|
||||
|
|
||||
60 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^
|
||||
|
||||
warning: not reporting region error due to -Znll
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:81:39
|
||||
|
|
||||
81 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^
|
||||
|
||||
warning: not reporting region error due to -Znll
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:109:39
|
||||
|
|
||||
109 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:49:29
|
||||
|
|
||||
49 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:22 ~ projection_two_region_trait_bound_closure[317d]::no_relationships_late[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 4
|
||||
= note: where <T as Anything<ReClosureBound('_#1r), ReClosureBound('_#2r)>>::AssocType: '_#3r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:60:29
|
||||
|
|
||||
60 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:27 ~ projection_two_region_trait_bound_closure[317d]::no_relationships_early[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
'_#3r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 5
|
||||
= note: where <T as Anything<ReClosureBound('_#2r), ReClosureBound('_#3r)>>::AssocType: '_#4r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:81:29
|
||||
|
|
||||
81 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:32 ~ projection_two_region_trait_bound_closure[317d]::projection_outlives[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
'_#3r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 5
|
||||
= note: where <T as Anything<ReClosureBound('_#2r), ReClosureBound('_#3r)>>::AssocType: '_#4r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:92:29
|
||||
|
|
||||
92 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:37 ~ projection_two_region_trait_bound_closure[317d]::elements_outlive1[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
'_#3r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 5
|
||||
= note: where <T as Anything<ReClosureBound('_#2r), ReClosureBound('_#3r)>>::AssocType: '_#4r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:101:29
|
||||
|
|
||||
101 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:42 ~ projection_two_region_trait_bound_closure[317d]::elements_outlive2[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
'_#3r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#4r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 5
|
||||
= note: where <T as Anything<ReClosureBound('_#2r), ReClosureBound('_#3r)>>::AssocType: '_#4r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:109:29
|
||||
|
|
||||
109 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:46 ~ projection_two_region_trait_bound_closure[317d]::two_regions[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 3
|
||||
= note: where <T as Anything<ReClosureBound('_#1r), ReClosureBound('_#1r)>>::AssocType: '_#2r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:120:29
|
||||
|
|
||||
120 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:50 ~ projection_two_region_trait_bound_closure[317d]::two_regions_outlive[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#3r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 4
|
||||
= note: where <T as Anything<ReClosureBound('_#2r), ReClosureBound('_#2r)>>::AssocType: '_#3r
|
||||
|
||||
note: External requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:132:29
|
||||
|
|
||||
132 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: defining type: DefId(0/1:53 ~ projection_two_region_trait_bound_closure[317d]::one_region[0]::{{closure}}[0]) with closure substs [
|
||||
'_#1r,
|
||||
T,
|
||||
i32,
|
||||
extern "rust-call" fn((std::cell::Cell<&'_#2r ()>, T))
|
||||
]
|
||||
= note: number of external vids: 3
|
||||
= note: where <T as Anything<ReClosureBound('_#1r), ReClosureBound('_#1r)>>::AssocType: '_#2r
|
||||
|
||||
error: failed type test: TypeTest { generic_kind: ProjectionTy { substs: Slice([T, '_#5r, '_#6r]), item_def_id: DefId(0/0:5 ~ projection_two_region_trait_bound_closure[317d]::Anything[0]::AssocType[0]) }, lower_bound: '_#7r, point: bb0[5], span: $DIR/projection-two-region-trait-bound-closure.rs:49:29: 49:55, test: Any([IsOutlivedByAnyRegionIn(['_#6r, '_#5r]), All([IsOutlivedByAnyRegionIn(['_#4r]), IsOutlivedByAllRegionsIn(['_#5r, '_#6r])])]) }
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:49:29
|
||||
|
|
||||
49 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:45:1
|
||||
|
|
||||
45 | / fn no_relationships_late<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
|
||||
46 | | where
|
||||
47 | | T: Anything<'b, 'c>,
|
||||
48 | | {
|
||||
... |
|
||||
51 | | //~| ERROR failed type test
|
||||
52 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:8 ~ projection_two_region_trait_bound_closure[317d]::no_relationships_late[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
error: failed type test: TypeTest { generic_kind: ProjectionTy { substs: Slice([T, '_#6r, '_#7r]), item_def_id: DefId(0/0:5 ~ projection_two_region_trait_bound_closure[317d]::Anything[0]::AssocType[0]) }, lower_bound: '_#8r, point: bb0[5], span: $DIR/projection-two-region-trait-bound-closure.rs:60:29: 60:55, test: Any([IsOutlivedByAnyRegionIn(['_#7r, '_#6r]), All([IsOutlivedByAnyRegionIn(['_#4r]), IsOutlivedByAllRegionsIn(['_#6r, '_#7r])])]) }
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:60:29
|
||||
|
|
||||
60 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:55:1
|
||||
|
|
||||
55 | / fn no_relationships_early<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
|
||||
56 | | where
|
||||
57 | | T: Anything<'b, 'c>,
|
||||
58 | | 'a: 'a,
|
||||
... |
|
||||
62 | | //~| ERROR failed type test
|
||||
63 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:9 ~ projection_two_region_trait_bound_closure[317d]::no_relationships_early[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
'_#3r,
|
||||
T
|
||||
]
|
||||
|
||||
error: failed type test: TypeTest { generic_kind: ProjectionTy { substs: Slice([T, '_#6r, '_#7r]), item_def_id: DefId(0/0:5 ~ projection_two_region_trait_bound_closure[317d]::Anything[0]::AssocType[0]) }, lower_bound: '_#8r, point: bb0[5], span: $DIR/projection-two-region-trait-bound-closure.rs:81:29: 81:55, test: Any([IsOutlivedByAnyRegionIn(['_#7r, '_#6r]), All([IsOutlivedByAnyRegionIn(['_#4r]), IsOutlivedByAllRegionsIn(['_#6r, '_#7r])])]) }
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:81:29
|
||||
|
|
||||
81 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:66:1
|
||||
|
|
||||
66 | / fn projection_outlives<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
|
||||
67 | | where
|
||||
68 | | T: Anything<'b, 'c>,
|
||||
69 | | T::AssocType: 'a,
|
||||
... |
|
||||
83 | | //~| ERROR failed type test
|
||||
84 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:10 ~ projection_two_region_trait_bound_closure[317d]::projection_outlives[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
'_#3r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:87:1
|
||||
|
|
||||
87 | / fn elements_outlive1<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
|
||||
88 | | where
|
||||
89 | | T: Anything<'b, 'c>,
|
||||
90 | | 'b: 'a,
|
||||
91 | | {
|
||||
92 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
93 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:11 ~ projection_two_region_trait_bound_closure[317d]::elements_outlive1[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
'_#3r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:96:1
|
||||
|
|
||||
96 | / fn elements_outlive2<'a, 'b, 'c, T>(cell: Cell<&'a ()>, t: T)
|
||||
97 | | where
|
||||
98 | | T: Anything<'b, 'c>,
|
||||
99 | | 'c: 'a,
|
||||
100 | | {
|
||||
101 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
102 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:12 ~ projection_two_region_trait_bound_closure[317d]::elements_outlive2[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
'_#3r,
|
||||
T
|
||||
]
|
||||
|
||||
error: free region `ReEarlyBound(0, 'b)` does not outlive free region `'_#2r`
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:109:20
|
||||
|
|
||||
109 | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
| ^^^^
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:105:1
|
||||
|
|
||||
105 | / fn two_regions<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
106 | | where
|
||||
107 | | T: Anything<'b, 'b>,
|
||||
108 | | {
|
||||
... |
|
||||
111 | | //~| ERROR free region `ReEarlyBound(0, 'b)` does not outlive free region `'_#2r`
|
||||
112 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:13 ~ projection_two_region_trait_bound_closure[317d]::two_regions[0]) with substs [
|
||||
'_#1r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:115:1
|
||||
|
|
||||
115 | / fn two_regions_outlive<'a, 'b, T>(cell: Cell<&'a ()>, t: T)
|
||||
116 | | where
|
||||
117 | | T: Anything<'b, 'b>,
|
||||
118 | | 'b: 'a,
|
||||
119 | | {
|
||||
120 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
121 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:14 ~ projection_two_region_trait_bound_closure[317d]::two_regions_outlive[0]) with substs [
|
||||
'_#1r,
|
||||
'_#2r,
|
||||
T
|
||||
]
|
||||
|
||||
note: No external requirements
|
||||
--> $DIR/projection-two-region-trait-bound-closure.rs:124:1
|
||||
|
|
||||
124 | / fn one_region<'a, T>(cell: Cell<&'a ()>, t: T)
|
||||
125 | | where
|
||||
126 | | T: Anything<'a, 'a>,
|
||||
127 | | {
|
||||
... |
|
||||
132 | | with_signature(cell, t, |cell, t| require(cell, t));
|
||||
133 | | }
|
||||
| |_^
|
||||
|
|
||||
= note: defining type: DefId(0/0:15 ~ projection_two_region_trait_bound_closure[317d]::one_region[0]) with substs [
|
||||
'_#1r,
|
||||
T
|
||||
]
|
||||
|
||||
error: aborting due to 4 previous errors
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue