Rollup of 16 pull requests
Successful merges:
- #53652 (define copy_within on slices)
- #54261 (Make `dyn` a keyword in the 2018 edition)
- #54280 (remove (more) CAS API from Atomic* types where not natively supported)
- #54323 (rustbuild: drop color handling)
- #54350 (Support specifying edition in doc test)
- #54370 (Improve handling of type bounds in `bit_set.rs`.)
- #54371 (add -Zui-testing to rustdoc)
- #54374 (Make 'proc_macro::MultiSpan' public.)
- #54402 (Use no_default_libraries for all NetBSD flavors)
- #54409 (Detect `for _ in in bar {}` typo)
- #54412 (add applicability to span_suggestion call)
- #54413 (Add UI test for deref recursion limit printing twice)
- #54415 (parser: Tweak function parameter parsing to avoid rollback on succesfull path)
- #54420 (Compress `Liveness` data some more.)
- #54422 (Simplify slice's first(_mut) and last(_mut) with get)
- #54446 (Unify christianpoveda's emails)
Failed merges:
- #54058 (Introduce the partition_dedup/by/by_key methods for slices)
r? @ghost
avoid leaking host details in proc macro metadata decoding
proc macro crates are essentially implemented as dynamic libraries using
a dlopen-based ABI. They are also Rust crates, so they have 2 worlds -
the "host" world in which they are defined, and the "target" world in
which they are used.
For all the "target" world knows, the proc macro crate might not even
be implemented in Rust, so leaks of details from the host to the target
must be avoided for correctness.
Because the "host" DefId space is different from the "target" DefId
space, any leak involving a DefId will have a nonsensical or
out-of-bounds DefKey, and will cause all sorts of crashes.
This PR fixes all leaks I have found in `decoder`. In particular, #54059
was caused by host native libraries leaking into the target, which feels
like it might even be a correctness issue if it doesn't cause an ICE.
Fixes#54059
Add UI test for deref recursion limit printing twice
Closes#38940
Does ``NOTE`` in the test need to be changed to ``HELP`` if its in the stderr?
``help: consider adding a `#![recursion_limit="20"]` attribute to your crate``
It doesn't appear to complaining locally that the line isn't set to ``HELP`` in the test, and the guide says
> HELP and SUGGESTION*
> * Note: SUGGESTION must follow immediately after HELP.
yet there's no concrete suggestion emitted.
r? @estebank
add -Zui-testing to rustdoc
Before we depend on the `rustdoc-ui` tests some more, let's make rustdoc act the same as the compiler when they're actually being executed.
* In the case of `derive-same-struct`, it seemed cleaner to add the
output than to try to modify the macro itself (which is where the
output is coming from).
* In the case of `custom-derive-partial-eq`, it was just easier to add
the output than to attempt to port the test to use a procedural
macro.
Rollup of 15 pull requests
Successful merges:
- #52813 (Duration div mul extras)
- #53470 (Warn about metadata loader errors)
- #54233 (Remove LLVM 3.9 workaround.)
- #54257 (Switch wasm math symbols to their original names)
- #54258 (Enable fatal warnings for the wasm32 linker)
- #54266 (Update LLVM to fix "bool" arguments on PPC32)
- #54290 (Switch linker for aarch64-pc-windows-msvc from LLD to MSVC)
- #54292 (Suggest array indexing when tuple indexing on an array)
- #54295 (A few cleanups and minor improvements to rustc/traits)
- #54298 (miri: correctly compute expected alignment for field)
- #54333 (Update The Book to latest)
- #54337 (Remove unneeded clone() from tests in librustdoc)
- #54346 (rustc: future-proof error reporting for polymorphic constants in types.)
- #54362 (Pass --batch to gdb)
- #54367 (Add regression test for thread local static mut borrows)
Add regression test for thread local static mut borrows
FIXME(#54366) - We probably shouldn't allow `#[thread_local] static mut` to get a `'static` lifetime, but for now, we should at least test the behavior that `rustc` currently has.
rustdoc: collect trait impls as an early pass
Fixes https://github.com/rust-lang/rust/issues/52545, fixes https://github.com/rust-lang/rust/issues/41480, fixes https://github.com/rust-lang/rust/issues/36922
Right now, rustdoc pulls all its impl information by scanning a crate's HIR for any items it finds. However, it doesn't recurse into anything other than modules, preventing it from seeing trait impls that may be inside things like functions or consts. Thanks to https://github.com/rust-lang/rust/pull/53002, now these items actually *exist* for rustdoc to see, but they still weren't getting collected for display.
But there was a secret. Whenever we pull in an item from another crate, we don't have any of its impls in the local HIR, so instead we ask the compiler for *everything* and filter out after the fact. This process is only triggered if there's a cross-crate re-export in the crate being documented, which can sometimes leave this info out of the docs. This PR instead moves this collection into an early pass, which occurs immediately after crate cleaning, so that that collection occurs regardless. In addition, by including the HIR's own `trait_impls` in addition to the existing `all_trait_implementations` calls, we can collect all these tricky trait impls without having to scan for them!
Update to a new pinning API.
~~Blocked on #53843 because of method resolution problems with new pin type.~~
@r? @cramertj
cc @RalfJung @pythonesque anyone interested in #49150
By introducing a new map that tracks the errors reported and the
`Place`s that spawned those errors against the move out that the error
was referring to, we are able to silence duplicate errors by emitting
only the error which corresponds to the most specific `Place` (that which
other `Place`s which reported errors are prefixes of).
This generally is an improvement, however there is a case -
`liveness-move-in-while` - where the output regresses.
Issue 54246
I added the option of providing a help message for deprecated features, that takes precedence over the default `help: remove this attribute` message, along with messages for the features that mention replacements in the reason for deprecation.
Fixes#54246.
Regression test for rust-lang/rust#53675.
(Includes a couple variations on the theme. I confirmed that the ones
in `in_expression_position` and `what_if_we_use_panic_directly_in_expr`
both failed back on "rustc 1.30.0-nightly (0f063aef6 2018-09-03)".)
Fix#53675
