Drop conditionally applied cargo `-Zon-broken-pipe=kill` flags to fix stage 1 cargo rebuilds
The conditionally applied `-Zon-broken-pipe=kill` flag trigger rebuilds because they can invalidate previous tool build cache due to differing flags. This PR removes those flags to stop tool build cache invalidation.
> The build cache for clippy will be broken because bootstrap sets `-Zon-broken-pipe=kill` for every invocation except for cargo. Which means building cargo will invalidate any tool build cache which was built previously.
>
> *From <https://rust-lang.zulipchat.com/#narrow/stream/326414-t-infra.2Fbootstrap/topic/Modifying.20run-make.20tests.20unnecessarily.20rebuild.20stage.201.20cargo/near/473486972>*
Fixes#130980.
But introduces #131059 (breaks 2 cargo tests that relied upon some behavior related to `-Zon-broken-pipe=kill` being set).
r? `@onur-ozkan` (or bootstrap)
Reject leading unsafe in `cfg!(...)` and `--check-cfg`
This PR reject leading unsafe in `cfg!(...)` and `--check-cfg`.
Fixes (after-backport) https://github.com/rust-lang/rust/issues/131055
r? `@jieyouxu`
make type-check-4 asm tests about non-const expressions
These tests recently got changed in https://github.com/rust-lang/rust/pull/129759. I asked the PR author to make the tests read from a `static mut` (rather than just making them "pass"), but I now think that was a mistake: previously the tests failed because the const was not a valid const expression, after the PR they failed because the const failed to evaluate.
So this PR restores the tests to "fail because the const is not a valid const expression". That can be done in a target-independent way so I unified the x86 and aarch64 tests into one.
Cc `@oli-obk` as the original [author](0d88631059) of these tests -- not sure if you still remember what they were intended to test.
add has_enzyme/needs-enzyme to the test infra
This unblocks merging the Enzyme / Autodiff frontend.
For the full implementation, see: https://github.com/rust-lang/rust/pull/129175
We don't want to run tests that require Enzyme / Autodiff support when we build rustc without the required features.
It correctly filtered out a test which started with `//@ needs-enzyme`.
```
running 80 tests
i...............................................................................
test result: ok. 79 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 380.41ms
```
Tracking:
- https://github.com/rust-lang/rust/issues/124509
r? jieyouxu
weekly update: add header to compiler deps update
Look at #131000: library and rustbook have nice headers for deps updates (i.e. `library dependencies:`), but not compiler one. Fixes this.
properly elaborate effects implied bounds for super traits
Summary: This PR makes it so that we elaborate `<T as Tr>::Fx: EffectsCompat<somebool>` into `<T as SuperTr>::Fx: EffectsCompat<somebool>` when we know that `trait Tr: ~const SuperTr`.
Some discussion at https://github.com/rust-lang/project-const-traits/issues/2.
r? project-const-traits
`@rust-lang/project-const-traits:` how do we feel about this approach?
Convert `&Option<T>` to `Option<&T>`
Run `ref_option` (#13336) on the Clippy's own code, quiet a few hits. Per mentioned video, this may actually improve performance as well. Switch lint to `pedantic`
----
changelog: [`ref_option`]: upgrade lint to `pedantic`
Rollup of 4 pull requests
Successful merges:
- #123932 (restate GlobalAlloc method safety preconditions in terms of what the caller has to do for greater clarity)
- #129003 (Improve Ord docs)
- #130972 (stabilize const_cell_into_inner)
- #130990 (try to get rid of mir::Const::normalize)
r? `@ghost`
`@rustbot` modify labels: rollup
stabilize const_cell_into_inner
This const-stabilizes
- `UnsafeCell::into_inner`
- `Cell::into_inner`
- `RefCell::into_inner`
- `OnceCell::into_inner`
`@rust-lang/wg-const-eval` this uses `rustc_allow_const_fn_unstable(const_precise_live_drops)`, so we'd be comitting to always finding *some* way to accept this code. IMO that's fine -- what these functions do is to move out the only field of a struct, and that struct has no destructor itself. The field's destructor does not get run as it gets returned to the caller.
`@rust-lang/libs-api` this was FCP'd already [years ago](https://github.com/rust-lang/rust/issues/78729#issuecomment-811409860), except that `OnceCell::into_inner` was added to the same feature gate since then (Cc `@tgross35).` Does that mean we have to re-run the FCP? If yes, I'd honestly prefer to move `OnceCell` into its own feature gate to not risk missing the next release. (That's why it's not great to add new functions to an already FCP'd feature gate.) OTOH if this needs an FCP either way since the previous FCP was so long ago, then we might as well do it all at once.
Improve Ord docs
- Makes wording more clear and re-structures some sections that can be overwhelming for someone not already in the know.
- Adds examples of how *not* to implement Ord, inspired by various anti-patterns found in real world code.
Many of the wording changes are inspired directly by my personal experience of being confused by the `Ord` docs and seeing other people get it wrong as well, especially lately having looked at a number of `Ord` implementations as part of #128899.
Created with help by `@orlp.`
r? `@workingjubilee`
