Tests marked `// force-host` were using the default linker, even if a
custom linker was configured in config.toml.
This change adds a new flag, --host-linker, to compiletest, and renames
--linker to --target-linker.
Rollup of 9 pull requests
Successful merges:
- #108548 (Clarify the 'use a constant in a pattern' error message)
- #109565 (Improve documentation for E0223)
- #109661 (Fix LVI test post LLVM 16 update)
- #109667 (Always set `RUSTC_BOOTSTRAP` with `x doc`)
- #109669 (Update books)
- #109678 (Don't shadow the `dep_node` var in `incremental_verify_ich_failed`)
- #109682 (Add `#[inline]` to CStr trait implementations)
- #109685 (Make doc comment a little bit more accurate)
- #109687 (Document the heuristics IsTerminal uses on Windows)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Always set `RUSTC_BOOTSTRAP` with `x doc`
Fixes#100060
Note that there is still a warning - the `unused_allocation` lint does not fire in stage 0, but that's just a matter of waiting for #104363 to land in beta
Clarify the 'use a constant in a pattern' error message
```rs
use std::borrow::Cow;
const ERROR_CODE: Cow<'_, str> = Cow::Borrowed("23505");
fn main() {
let x = Cow::from("23505");
match x {
ERROR_CODE => {}
}
}
```
```
error: to use a constant of type `Cow` in a pattern, `Cow` must be annotated with `#[derive(PartialEq, Eq)]`
--> src/main.rs:9:9
|
9 | ERROR_CODE => {}
| ^^^^^^^^^^
error: could not compile `playground` due to previous error
```
It seems helpful to link to StructuralEq in this message. I was a little confused, because `Cow<'_, str>` implements PartialEq and Eq, but they're not derived, which I learned is necessary for structural equality and using constants in patterns (thanks to the Rust community Discord server)
For tests, should I update every occurrence of this message? I see tests where this is still a warning and I'm not sure if I should update those.
[rust-installer] Allow long link names in tar files
Without this, users trying to run `x.py dist` under a sufficiently long path run into problems when we build the resulting tarballs due to length limits in the original tar spec. The error looks like:
Finished release [optimized + debuginfo] target(s) in 0.34s
Copying stage0 std from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-musl)
Building stage0 tool rust-installer (x86_64-unknown-linux-gnu)
Finished release [optimized] target(s) in 0.35s
Dist rust-std-1.67.1-x86_64-unknown-linux-musl
Error: failed to generate installer
Caused by:
0: failed to tar file '/home/AAAAAAAAAAAAAA/BBBBBB/CCCC/DDD/EEEEE/FFFFFFFFFFFF/GGGGGGGGGGGGGGGG/HHHHHHHHHH/IIIIIIIIIIIIIII/JJJJJ/KKKKKKK/src/build/tmp/tarball/rust-std/x86_64-unknown-linux-musl/rust-std-1.67.1-x86_64-unknown-linux-musl/rust-std-x86_64-unknown-linux-musl/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/libc.a'
1: provided value is too long when setting link name for
Build completed unsuccessfully in 0:00:03
The fix is to make use of the widely-supported GNU tar extensions which lift this restriction. Switching to [`tar::Builder::append_link`] takes care of that for us. See also alexcrichton/tar-rs#273.
[`tar::Builder::append_link`]: https://docs.rs/tar/0.4.38/tar/struct.Builder.html#method.append_link
Don't skip all directories when tidy-checking
This fixes a regression from https://github.com/rust-lang/rust/pull/108772 which basically made it that tidy style checks only `README.md` and `COMPILER_TESTS.md`.
Remove the `NodeId` of `ast::ExprKind::Async`
This is a followup to https://github.com/rust-lang/rust/pull/104833#pullrequestreview-1314537416.
In my original attempt, I was using `LoweringContext::expr`, which was not correct as it creates a fresh `DefId`.
It now uses the correct `DefId` for the wrapping `Expr`, and also makes forwarding `#[track_caller]` attributes more explicit.
rustdoc: Fix ICE for intra-doc link on intermediate re-export
Fixes https://github.com/rust-lang/rust/issues/109282.
This PR is based on #109266 as it includes its commit to make this work.
`@petrochenkov:` It was exactly as you predicted, adding the `DefId` to the attributes fixed the error for intermediate re-exports as well. Thanks a lot!
r? `@petrochenkov`
Rename 'src/bootstrap/native.rs' to llvm.rs
Fixed#108240
Renamed 'native.rs' to 'llvm.rs', also moved `TestHelpers` to `test.rs`. Replaced all the `native.rs` occurrences at `src/bootstrap` files to `llvm.rs`
More config.toml.example cleanups
- Link to more documentation
- Move `changelog-seen` into the "Global Settings" section
- Update incorrect comments on `llvm.link-shared` and `rust.debug-assertions`
- Use the correct default in the commented-out example more often
- Clarify that `docs` and `compiler-docs` only control the default, they're not a hard-off switch.
- Document `-vvv` and `local-rebuild`
- Minor improvements to doc-comments in config.toml.example
This also sets `download-rustc = false`; that was already the default, but it will be helpful in case the default changes (https://jyn.dev/2023/01/12/Bootstrapping-Rust-in-2023.html).
- Link to more documentation
- Move `changelog-seen` into the "Global Settings" section
- Update incorrect comments on `llvm.link-shared` and
`rust.debug-assertions`
- Use the correct default in the commented-out example more often
- Clarify that `docs` and `compiler-docs` only control the default,
they're not a hard-off switch.
- Document `-vvv` and `local-rebuild`
- Minor improvements to doc-comments in config.toml.example
This also sets `download-rustc = false`; that was already the default,
but it will be helpful in case the default changes
(https://jyn.dev/2023/01/12/Bootstrapping-Rust-in-2023.html).
Don't elaborate non-obligations into obligations
It's suspicious to elaborate a `PolyTraitRef` or `Predicate` into an `Obligation`, since the former does not have a param-env associated with it, but the latter does. This is a footgun that, while not being misused *currently* in the compiler, easily could be misused by someone less familiar with the elaborator's inner workings.
This PR just changes the API -- ideally, the elaborator wouldn't even have to deal with obligations if we're not elaborating obligations, but that would require a bit more abstraction than I could be bothered with today.
Fix "Directly go to item in search if there is only one result" setting
Part of #66181.
The setting was actually broken, so I fixed it when I added the GUI test.
r? `@notriddle`
Permit the MIR inliner to inline diverging functions
This heuristic prevents inlining of `hint::unreachable_unchecked`, which in turn makes `Option/Result::unwrap_unchecked` a bad inlining candidate. I looked through the changes to `core`, `alloc`, `std`, and `hashbrown` by hand and they all seem reasonable. Let's see how this looks in perf...
---
Based on rustc-perf it looks like this regresses ctfe-stress, and the cachegrind diff indicates that this regression is in `InterpCx::statement`. I don't know how to do any deeper analysis because that function is _enormous_ in the try toolchain, which has no debuginfo in it. And a local build produces significantly different codegen for that function, even with LTO.
Upgrade to LLVM 16, again
Relative to the previous attempt in https://github.com/rust-lang/rust/pull/107224:
* Update to GCC 8.5 on dist-x86_64-linux, to avoid std::optional ABI-incompatibility between libstdc++ 7 and 8.
* Cherry-pick 96df79af02.
* Cherry-pick 6fc670e5e3.
r? `@cuviper`
Bugfix: avoid panic on invalid json output from libtest
#108659 introduces a custom test display implementation. It does so by using libtest to output json. The stdout is read and parsed; The code trims the line read and checks whether it starts with a `{` and ends with a `}`. If so, it concludes that it must be a json encoded `Message`. Unfortunately, this does not work in all cases:
- This assumes that tests running with `--nocapture` will never start and end lines with `{` and `}` characters
- Output is generated by issuing multiple `write_message` [statements](https://github.com/rust-lang/rust/blob/master/library/test/src/formatters/json.rs#L33-L60). Where only the last one issues a `\n`. This likely results in a race condition as we see multiple json outputs on the same line when running tests for the `x86_64-fortanix-unknown-sgx` target:
```
10:21:04 [0m[0m[1m[32m Running[0m tests/run-time-detect.rs (build/x86_64-unknown-linux-gnu/stage1-std/x86_64-fortanix-unknown-sgx/release/deps/run_time_detect-8c66026bd4b1871a)
10:21:04
10:21:04 running 1 tests
10:21:04 test x86_all ... ok
10:21:04 [0m[0m[1m[32m Running[0m tests/thread.rs (build/x86_64-unknown-linux-gnu/stage1-std/x86_64-fortanix-unknown-sgx/release/deps/thread-ed5456a7d80a6193)
10:21:04 thread 'main' panicked at 'failed to parse libtest json output; error: trailing characters at line 1 column 135, line: "{ \"type\": \"suite\", \"event\": \"ok\", \"passed\": 1, \"failed\": 0, \"ignored\": 0, \"measured\": 0, \"filtered_out\": 0, \"exec_time\": 0.000725911 }{ \"type\": \"suite\", \"event\": \"started\", \"test_count\": 1 }\n"', render_tests.rs:108:25
```
This PR implements a partial fix by being much more conservative of what it asserts is a valid json encoded `Message`. This prevents panics, but still does not resolve the race condition. A discussion is needed where this race condition comes from exactly and how it best can be avoided.
cc: `@jethrogb,` `@pietroalbini`
Without this, users trying to run `x.py dist` under a sufficiently long
path run into problems when we build the resulting tarballs due to
length limits in the original tar spec. The error looks like:
Finished release [optimized + debuginfo] target(s) in 0.34s
Copying stage0 std from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-musl)
Building stage0 tool rust-installer (x86_64-unknown-linux-gnu)
Finished release [optimized] target(s) in 0.35s
Dist rust-std-1.67.1-x86_64-unknown-linux-musl
Error: failed to generate installer
Caused by:
0: failed to tar file '/home/AAAAAAAAAAAAAA/BBBBBB/CCCC/DDD/EEEEE/FFFFFFFFFFFF/GGGGGGGGGGGGGGGG/HHHHHHHHHH/IIIIIIIIIIIIIII/JJJJJ/KKKKKKK/src/build/tmp/tarball/rust-std/x86_64-unknown-linux-musl/rust-std-1.67.1-x86_64-unknown-linux-musl/rust-std-x86_64-unknown-linux-musl/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/libc.a'
1: provided value is too long when setting link name for
Build completed unsuccessfully in 0:00:03
The fix is to make use of the widely-supported GNU tar extensions which
lift this restriction. Switching to [`tar::Builder::append_link`] takes
care of that for us. See also alexcrichton/tar-rs#273.
[`tar::Builder::append_link`]: https://docs.rs/tar/0.4.38/tar/struct.Builder.html#method.append_link
rustdoc: Optimize impl sorting during rendering
This should fix the perf regression on [bitmaps-3.1.0](https://github.com/rust-lang/rustc-perf/tree/master/collector/compile-benchmarks/bitmaps-3.1.0) from https://github.com/rust-lang/rust/pull/107765.
The bitmaps crate has a lot of impls:
```rust
impl Bits for BitsImpl<1> { ... }
impl Bits for BitsImpl<2> { ... }
// ...
impl Bits for BitsImpl<1023> { ... }
impl Bits for BitsImpl<1024> { ... }
```
and the logic in `fn print_item` sorts them in natural order.
Before https://github.com/rust-lang/rust/pull/107765 the impls came in source order, which happened to be already sorted in the necessary way.
So the comparison function was called fewer times.
After https://github.com/rust-lang/rust/pull/107765 the impls came in "stable" order (based on def path hash).
So the comparison function was called more times to sort them.
The comparison function was terribly inefficient, so it caused a large perf regression.
This PR attempts to make it more efficient by using cached keys during sorting.
Shrink unicode case-mapping LUTs by 24k
I was looking into the binary bloat of a small program using `str::to_lowercase` and `str::to_uppercase`, and noticed that the lookup tables used for case mapping had a lot of zero-bytes in them. The reason for this is that since some characters map to up to three other characters when lower or uppercased, the LUTs store a `[char; 3]` for each character. However, the vast majority of cases only map to a single new character, in other words most of the entries are e.g. `(lowerc, [upperc, '\0', '\0'])`.
This PR introduces a new encoding scheme for these tables.
The changes reduces the size of my test binary by about 24K.
I've also done some `#[bench]`marks on unicode-heavy test data, and found that the performance of both `str::to_lowercase` and `str::to_uppercase` improves by up to 20%. These measurements are obviously very dependent on the character distribution of the data.
Someone else will have to decide whether this more complex scheme is worth it or not, I was just goofing around a bit and here's what came out of it 🤷♂️ No hard feelings if this isn't wanted!
rustdoc: add support for type filters in arguments and generics
This makes sense, since the search index has the information in it, and it's more useful for function signature searches since a function signature search's item type is, by definition, some type of function (there's more than one, but not very many).
