Rollup of 7 pull requests #65952
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Rollup of 7 pull requests #65952
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To check if a method's receiver type is object safe, we create a new receiver type by substituting in a bogus type parameter (let's call it `U`) for `Self`, and checking that the unmodified receiver type implements `DispatchFromDyn<receiver type with Self = U>`. It would be better to use `dyn Trait` directly, and the only reason we don't is because it triggers another check that `Trait` is object safe, resulting in a query cycle. Once the feature `object_safe_for_dispatch` (tracking issue rust-lang#43561) is stabilized, this will no longer be the case, and we'll be able to use `dyn Trait` as the unsized `Self` type. I've updated the comments in object_safety.rs accordingly.
Uploading the toolstate data for each commit will help our release tooling understand which components are failing, to possibly skip shipping broken tools to users.
Co-Authored-By: lzutao <taolzu@gmail.com>
Replace O(n^3) text matching with inexpensive hash set lookups. On my machine this reduces the total runtime of complete run-make-fulldeps suite from roughly 75 seconds to 45 seconds.
This causes issues in at least `dist-i586-gnu-i586-i686-musl`, possibly others.
…nikomatsakis Custom lifetime error for `impl` item doesn't conform to `trait` Partly addresses rust-lang#42706, rust-lang#41343, fix rust-lang#40900.
Add lint and tests for unnecessary parens around types This is my first contribution to the Rust project, so I apologize if I'm not doing things the right way. The PR fixes rust-lang#64169. It adds a lint and tests for unnecessary parentheses around types. I've run `tidy` and `rustfmt` — I'm not totally sure it worked right, though — and I've tried to follow the instructions linked in the readme. I tried to think through all the variants of `ast::TyKind` to find exceptions to this lint, and I could only find the one mentioned in the original issue, which concerns types with `dyn`. I'm not a Rust expert, thought, so I may well be missing something. There's also a problem with getting this to build. The new lint catches several things in the, e.g., `core`. Because `x.py` seems to build with an equivalent of `-Werror`, what would have been warnings cause the build to break. I got it to build and the tests to pass with `--warnings warn` on my `x.py build` and `x.py test` commands.
build-std compatible sanitizer support ### Motivation When using `-Z sanitizer=*` feature it is essential that both user code and standard library is instrumented. Otherwise the utility of sanitizer will be limited, or its use will be impractical like in the case of memory sanitizer. The recently introduced cargo feature build-std makes it possible to rebuild standard library with arbitrary rustc flags. Unfortunately, those changes alone do not make it easy to rebuild standard library with sanitizers, since runtimes are dependencies of std that have to be build in specific environment, generally not available outside rustbuild process. Additionally rebuilding them requires presence of llvm-config and compiler-rt sources. The goal of changes proposed here is to make it possible to avoid rebuilding sanitizer runtimes when rebuilding the std, thus making it possible to instrument standard library for use with sanitizer with simple, although verbose command: ``` env CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS=-Zsanitizer=thread cargo test -Zbuild-std --target x86_64-unknown-linux-gnu ``` ### Implementation * Sanitizer runtimes are no long packed into crates. Instead, libraries build from compiler-rt are used as is, after renaming them into `librusc_rt.*`. * rustc obtains runtimes from target libdir for default sysroot, so that they are not required in custom build sysroots created with build-std. * The runtimes are only linked-in into executables to address issue rust-lang#64629. (in previous design it was hard to avoid linking runtimes into static libraries produced by rustc as demonstrated by sanitizer-staticlib-link test, which still passes despite changes made in rust-lang#64780). * When custom llvm-config is specified during build process, the sanitizer runtimes will be obtained from there instead of begin rebuilding from sources in src/llvm-project/compiler-rt. This should be preferable since runtimes used should match instrumentation passes. For example there have been nine version of address sanitizer ABI. Note this marked as a draft PR, because it is currently untested on OS X (I would appreciate any help there). cc @kennytm, @japaric, @Firstyear, @choller
…=alexcrichton Upload toolstates.json to rust-lang-ci2 This PR does two things: * Following up with rust-lang#65202, it migrates deploying artifacts to CI in a script. Both uploading release artifacts and CPU stats were merged into the same script, designing it to be easily extended. * Uploads the toolstate JSON to `rust-lang-ci2` along with the release artifacts, both for Linux and Windows. This is needed because @RalfJung wants to stop shipping MIRI when its tests are failing, and the toolstate repo doesn't have entries for each commit. Having the toolstate data (just for that specific commit) on `rust-lang-ci2` will simplify the code a lot. r? @alexcrichton cc @RalfJung
Update comments re type parameter hack in object safety To check if a method's receiver type is object safe, we create a new receiver type by substituting in a bogus type parameter (let's call it `U`) for `Self`, and checking that the unmodified receiver type implements `DispatchFromDyn<receiver type with Self = U>`. It would be better to use `dyn Trait` directly, and the only reason we don't is because it triggers another check that `Trait` is object safe, resulting in a query cycle. Once the feature `object_safe_for_dispatch` (tracking issue rust-lang#43561) is stabilized, this will no longer be the case, and we'll be able to use `dyn Trait` as the unsized `Self` type. I've updated the comments in object_safety.rs accordingly. cc @Centril @nikomatsakis @bovinebuddha
…davidtwco Use structured suggestion for unnecessary bounds in type aliases
…=alexcrichton Optimize long-linker-command-line test Replace O(n^3) text matching with inexpensive hash set lookups. On my machine this reduces the total runtime of complete run-make-fulldeps suite from roughly 75 seconds to 45 seconds.
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@bors r+ p=7 rollup=never |
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📌 Commit 167a8f5 has been approved by |
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⌛ Testing commit 167a8f5 with merge 4cb558b69fcd87d78a9c89866bbcdb0c28133f8c... |
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The job Click to expand the log.I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact |
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💔 Test failed - checks-azure |
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Successful merges:
implitem doesn't conform totrait#65068 (Custom lifetime error forimplitem doesn't conform totrait)Failed merges:
r? @ghost