Auto merge of #26147 - arielb1:assoc-trans, r=nikomatsakis

Fixes #25700

r? @nikomatsakis

src/test/compile-fail/issue-25700.rs

@@ -0,0 +1,24 @@
+// Copyright 2015 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.
+
+struct S<T: 'static>(Option<&'static T>);
+
+trait Tr { type Out; }
+impl<T> Tr for T { type Out = T; }
+
+impl<T: 'static> Copy for S<T> where S<T>: Tr<Out=T> {}
+impl<T: 'static> Clone for S<T> where S<T>: Tr<Out=T> {
+    fn clone(&self) -> Self { *self }
+}
+fn main() {
+    let t = S::<()>(None);
+    drop(t);
+    drop(t); //~ ERROR use of moved value
+}

src/test/run-pass/issue-25700-1.rs

@@ -0,0 +1,22 @@
+// Copyright 2015 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.
+
+struct S<T: 'static>(Option<&'static T>);
+
+trait Tr { type Out; }
+impl<T> Tr for T { type Out = T; }
+
+impl<T: 'static> Copy for S<T> where S<T>: Tr<Out=T> {}
+impl<T: 'static> Clone for S<T> where S<T>: Tr<Out=T> {
+    fn clone(&self) -> Self { *self }
+}
+fn main() {
+    S::<()>(None);
+}

src/test/run-pass/issue-25700-2.rs

@@ -0,0 +1,31 @@
+// Copyright 2015 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.
+
+pub trait Parser {
+    type Input;
+}
+
+pub struct Iter<P: Parser>(P, P::Input);
+
+pub struct Map<P, F>(P, F);
+impl<P, F> Parser for Map<P, F> where F: FnMut(P) {
+    type Input = u8;
+}
+
+trait AstId { type Untyped; }
+impl AstId for u32 { type Untyped = u32; }
+
+fn record_type<Id: AstId>(i: Id::Untyped) -> u8 {
+    Iter(Map(i, |_: Id::Untyped| {}), 42).1
+}
+
+pub fn main() {
+   assert_eq!(record_type::<u32>(3), 42);
+}