Use llvm-libunwind="in-tree" for Fuchsia targets
With updates to Fuchsia CI's Zircon libraries #99833, we can introduce `llvm-libunwind="in-tree"` for Fuchsia targets. This PR restores functionality removed from https://github.com/rust-lang/rust/pull/93604#issuecomment-1136515651.
cc `@tmandry` `@djkoloski`
Rollup of 9 pull requests
Successful merges:
- #100022 (Optimize thread ID generation)
- #100030 (cleanup code w/ pointers in std a little)
- #100229 (add -Zextra-const-ub-checks to enable more UB checking in const-eval)
- #100247 (Generalize trait object generic param check to aliases.)
- #100255 (Adding more verbose documentation for `std::fmt::Write`)
- #100366 (errors: don't fail on broken primary translations)
- #100396 (Suggest const and static for global variable)
- #100409 (rustdoc: don't generate DOM element for operator)
- #100443 (Add two let else regression tests)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Add two let else regression tests
Adds a regression test for #94176, as it was fixed by #98574 but doesn't have a regression test. The PR also incorporates a commit from #94012 which added a test for an issue discovered in that PR.
Originally they have been part of #99291, but I've moved them out in the hopes of getting them merged more quickly, as that PR is already open since a month, and so that #99291 can focus on the drop order part of things.
Closes#94176Closes#96961 -- dupe of #94176
errors: don't fail on broken primary translations
If a primary bundle doesn't contain a message then the fallback bundle is used. However, if the primary bundle's message is broken (e.g. it refers to a interpolated variable that the compiler isn't providing) then this would just result in a compiler panic. While there aren't any primary bundles right now, this is the type of issue that could come up once translation is further along.
r? ```@compiler-errors``` (since this comes out of a in-person discussion we had at RustConf)
Generalize trait object generic param check to aliases.
The current algorithm only checks that `Self` does not appear in defaults for traits. This is not sufficient for trait aliases.
This PR moves the check to trait object elaboration, which sees through trait aliases.
Fixes https://github.com/rust-lang/rust/issues/82927.
Fixes https://github.com/rust-lang/rust/issues/84789.
passes: load `defined_lib_features` query less
Hopefully addresses the perf regressions from #99212 (see #99905).
Re-structure the stability checks for library features to avoid calling `defined_lib_features` for any more crates than necessary for each of the implications or local feature attributes that need validation.
r? `@ghost` (just checking perf at first)
promote debug_assert to assert when possible and useful
This PR fixed a very old issue https://github.com/rust-lang/rust/issues/94705 to clarify and improve the POSIX error checking, and some of the checks are skipped because can have no benefit, but I'm sure that this can open some interesting discussion.
Fixes https://github.com/rust-lang/rust/issues/94705
cc: `@tavianator`
cc: `@cuviper`
Update cargo
8 commits in ce40690a5e4e315d3dab0aae1eae69d0252c52ac..efd4ca3dc0b89929dc8c5f5c023d25978d76cb61
2022-08-09 22:32:17 +0000 to 2022-08-12 01:28:28 +0000
- Use `std:🧵:scope` to replace crossbeam (rust-lang/cargo#10977)
- [docs] Remove extra "in" from `cargo-test.md` (rust-lang/cargo#10978)
- Enable two windows tests (rust-lang/cargo#10930)
- Improve error msg for get target runner (rust-lang/cargo#10968)
- Ensure rustc-echo-wrapper works with an overridden build.target-dir (rust-lang/cargo#10962)
- Switch back to `available_parallelism` (rust-lang/cargo#10969)
- Only override published resolver when the workspace is different (rust-lang/cargo#10961)
- Add `CARGO_LOG` to "Environment variables Cargo reads" (rust-lang/cargo#10967)
Update to LLVM 15
For preliminary testing. Some LLVM 15 compatibility fixes were applied separately in #99512.
Release timeline:
* LLVM 15 branched on Jul 26.
* The final LLVM 15.0.0 release is scheduled for Sep 6.
* Current nightly (1.65.0) is scheduled for Nov 3.
Changes in this PR (apart from the LLVM update):
* Pass `--set llvm.allow-old-toolchain` for many Docker images. LLVM 16 will require GCC >= 7.1, while LLVM 15 still allows older compilers with an option. Specify the option for builders still using GCC 5.4. #95026 updated some of the used toolchains, but not all.
* Use the `+atomics-32` target feature for thumbv6m.
* Explicitly link libatomic when cross-compiling LLVM to 32-bit target.
* Explicitly disable zstd support, to avoid libzstd.so dependency.
New LLVM patches ([commits](https://github.com/rust-lang/llvm-project/commits/rustc/15.0-2022-08-09)):
* [rust-only] Fix ICE with GCC 5.4 (15be58d7f0)
* [rust-only] Fix build with GCC 5.4 (774edc10fa)
* ~~[rust-only] Fix build with GCC 5.2 (1a6069a7bb)~~
* ~~[rust-only] Fix ICE with GCC 5.2 (493081f290)~~
* ~~[rust-only] Fix build with GCC 5.2 (0fc5979d73)~~
* [backported] Addition of `+atomics` target feature (57bdd9892d).
* [backported] Revert compiler-rt change that broke powerpc (9c68b43915)
* [awaiting backport] Fix RelLookupTableConverter on gnux32 (639388a05f / https://github.com/llvm/llvm-project/issues/57021)
Tested images: dist-x86_64-linux, armhf-gnu, arm-android, dist-s390x-linux, dist-x86_64-illumos, dist-x86_64-freebsd, wasm32, dist-x86_64-musl, dist-various-1, dist-riscv64-linux, dist-mips-linux, dist-mipsel-linux, dist-powerpc-linux, dist-aarch64-linux, dist-x86_64-apple, x86_64-msvc-1, x86_64-msvc-2, dist-various-2, dist-arm-linux
Tested up to the usual ipv6 error: test-various, i686-gnu, x86_64-gnu-nopt
r? `@ghost`
In our source page highlighting, we were generating `<span class="op">`
tags for all "operators", including e.g. `<` `>` around generic
parameters, `*`, `&`. This contributed significantly to DOM size, but
we don't actually style `.op` except in the ayu theme.
Remove the styles for `.op` in ayu, and stop generating the `<span>`s.
This reduces DOM size of an example page[1] from 265,938 HTML elements
to 242,165 elements, a 9% reduction.
[1]:
https://doc.rust-lang.org/nightly/src/core/up/up/stdarch/crates/core_arch/src/x86/avx512f.rs.html
Stringify non-shorthand visibility correctly
This makes `stringify!(pub(in crate))` evaluate to `pub(in crate)` rather than `pub(crate)`, matching the behavior before the `crate` shorthand was removed. Further, this changes `stringify!(pub(in super))` to evaluate to `pub(in super)` rather than the current `pub(super)`. If the latter is not desired (it is _technically_ breaking), it can be undone.
Fixes#99981
`@rustbot` label +C-bug +regression-from-stable-to-beta +T-compiler
Add `x.sh` and `x.ps1` shell scripts
This is a more ambitious version of https://github.com/rust-lang/rust/pull/98716.
It still changes the x.py shebang back to python3, for compatibility with non-Unix systems,
but also adds alternative entrypoints for systems without `python3` installed.
These scripts will be necessary for the rust entrypoint (#94829), so I see
little downside in adding them early.
I'll update the dev-guide to suggest using these instead of x.py once this is merged.
Fixes https://github.com/rust-lang/rust/issues/98650
r? `@Mark-Simulacrum` cc `@dtolnay` `@CAD97` `@yoshuawuyts`
make raw_eq precondition more restrictive
Specifically, don't allow comparing pointers that way. Comparing pointers is subtle because you have to talk about what happens to the provenance.
This matches what [Miri already implements](https://play.rust-lang.org/?version=nightly&mode=debug&edition=2021&gist=9eb1dfb8a61b5a2d4a7cee43df2717af), and all existing users are fine with this.
If raw_eq on pointers is ever desired, we can adjust the intrinsic spec and Miri implementation as needed, but for now that seems just unnecessary. Also, this is a const intrinsic, and in const, comparing pointers this way is *not possible* -- so if we allow the intrinsic to compare pointers in general, we need to impose an extra restrictions saying that in const-context, pointers are *not* okay.
Fix flags when using clang as linker for Fuchsia
Don't add C runtime or set dynamic linker when linking with clang for
Fuchsia. Clang already does this for us.
rustdoc: simplify highlight.rs
Split render_with_highlighting, which took many optional parameters, into three functions for specific purposes, which each take a smaller number of mostly required parameters.
Remove some plumbing to pass through an "edition" parameter, which was used solely to avoid highlighting some 2021 Edition keywords in non-2021 code.
I've tested a build of std docs before and after, and this does not change the generated HTML at all.
Followup from https://github.com/rust-lang/rust/pull/91264#discussion_r901151101
r? ```@GuillaumeGomez```
Improve error messages when running rustdoc GUI tests
There was already a message on how to install `browser-ui-test`, so nothing to be done there. However, we didn't show how to update its version, so the first commit adds it.
Another pain point was how to fix the unexpected crash in `browser-ui-test` (because of a missing `--no-sandbox`, still no idea why it became mandatory a few months ago on some linux distributions...). It now looks like this:
```console
Running 1 rustdoc-gui (8 concurrently) ...
ERROR: puppeteer failed when trying to create a new page. Please try again with `--no-sandbox`
`browser-ui-test` crashed unexpectedly. Please try again with adding `--test-args --no-sandbox` at the end. For example: `x.py test src/test/rustdoc-gui --test-args --no-sandbox`
Build completed unsuccessfully in 0:00:03
```
Thanks to `@jsha` for suggesting these improvements!
r? `@jsha`
