add back test for stable-const-can-only-call-stable-const
This got accidentally removed in https://github.com/rust-lang/rust/pull/128596 (file `tests/ui/internal/internal-unstable-const.rs`). The test has little to do with "allow internal unstable" though, so add it in a file that already tests various const stability things.
Also tweak the help that suggests to add `rustc_allow_const_fn_unstable` to make it clear that this needs team approval, since it is a fairly big gun.
rustdoc: clean up tuple <-> primitive conversion docs
This adds a minor missing feature to `fake_variadic`, so that it can render `impl From<(T,)> for [T; 1]` correctly.
Remove redundant flags from `lower_ty_common` that can be inferred from the HIR
...and then get rid of `lower_ty_common`.
r? ``@fmease`` or re-roll if you're busy!
Use subtyping for `UnsafeFnPointer` coercion, too
I overlooked this in #129059, which changed MIR typechecking to use subtyping for other fn pointer coercions.
Fixes#129285
Print the generic parameter along with the variance in dumps.
This allows to make sure we are testing what we think we are testing.
While the tests are correct, I discovered that opaque duplicated args are in the reverse declaration order.
Add a special case for `CStr`/`CString` in the `improper_ctypes` lint
Revives #120176. Just needed to bless a test and fix an argument, but seemed reasonable to me otherwise.
Instead of saying to "consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct", we now tell users to "Use `*const ffi::c_char` instead, and pass the value from `CStr::as_ptr()`" when the type involved is a `CStr` or a `CString`.
The suggestion is not made for `&mut CString` or `*mut CString`.
r? ``````@cjgillot`````` (since you were the reviewer of the original PR #120176, but feel free to reroll)
Detect `*` operator on `!Sized` expression
The suggestion is new:
```
error[E0277]: the size for values of type `str` cannot be known at compilation time
--> $DIR/unsized-str-in-return-expr-arg-and-local.rs:15:9
|
LL | let x = *"";
| ^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `str`
= note: all local variables must have a statically known size
= help: unsized locals are gated as an unstable feature
help: references to `!Sized` types like `&str` are `Sized`; consider not dereferencing the expression
|
LL - let x = *"";
LL + let x = "";
|
```
Fix#128199.
remove invalid `TyCompat` relation for effects
if the current impl uses `Maybe` (`impl const`), the parent impl must use `Maybe` (`impl const`) as well.
I'd like to rename `TyCompat` to `Sub` which is probably clearer. But it would conflict with my other PR.
r? ``@rust-lang/project-const-traits``
Retroactively feature gate `ConstArgKind::Path`
This puts the lowering introduced by #125915 under a feature gate until we fix the regressions introduced by it. Alternative to whole sale reverting the PR since it didn't seem like a very clean revert and I think this is generally a step in the right direction and don't want to get stuck landing and reverting the PR over and over :)
cc #129137 ``@camelid,`` tests taken from there. beta is branching soon so I think it makes sense to not try and rush that fix through since it wont have much time to bake and if it has issues we can't simply revert it on beta.
Fixes#128016
make writes_through_immutable_pointer a hard error
This turns the lint added in https://github.com/rust-lang/rust/pull/118324 into a hard error. This has been reported in cargo's future-compat reports since Rust 1.76 (released in February). Given that const_mut_refs is still unstable, it should be impossible to even hit this error on stable: we did accidentally stabilize some functions that can cause this error, but that got reverted in https://github.com/rust-lang/rust/pull/117905. Still, let's do a crater run just to be sure.
Given that this should only affect unstable code, I don't think it needs an FCP, but let's Cc ``@rust-lang/lang`` anyway -- any objection to making this unambiguous UB into a hard error during const-eval? This can be viewed as part of https://github.com/rust-lang/rust/pull/129195 which is already nominated for discussion.
Rollup of 9 pull requests
Successful merges:
- #128511 (Document WebAssembly target feature expectations)
- #129243 (do not build `cargo-miri` by default on stable channel)
- #129263 (Add a missing compatibility note in the 1.80.0 release notes)
- #129276 (Stabilize feature `char_indices_offset`)
- #129350 (adapt integer comparison tests for LLVM 20 IR changes)
- #129408 (Fix handling of macro arguments within the `dropping_copy_types` lint)
- #129426 (rustdoc-search: use tighter json for names and parents)
- #129437 (Fix typo in a help diagnostic)
- #129457 (kobzol vacation)
r? `@ghost`
`@rustbot` modify labels: rollup
Fix handling of macro arguments within the `dropping_copy_types` lint
This PR fixes the handling of spans with different context (aka macro arguments) than the primary expression within the different `{drop,forget}ing_copy_types` and `{drop,forget}ing_references` lints.
<details>
<summary>Before</summary>
```
warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
--> drop_writeln.rs:5:5
|
5 | drop(writeln!(&mut msg, "test"));
| ^^^^^--------------------------^
| |
| argument has type `Result<(), std::fmt::Error>`
|
= note: `#[warn(dropping_copy_types)]` on by default
help: use `let _ = ...` to ignore the expression or result
--> /home/[..]/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/macros/mod.rs:688:9
|
68| let _ =
| ~~~~~~~
```
</details>
<details>
<summary>With this PR</summary>
```
warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
--> drop_writeln.rs:5:5
|
5 | drop(writeln!(&mut msg, "test"));
| ^^^^^--------------------------^
| |
| argument has type `Result<(), std::fmt::Error>`
|
= note: `#[warn(dropping_copy_types)]` on by default
help: use `let _ = ...` to ignore the expression or result
|
5 - drop(writeln!(&mut msg, "test"));
5 + let _ = writeln!(&mut msg, "test");
|
```
</details>
``````@rustbot`````` label +L-dropping_copy_types
Fix extern crates not being hidden with `doc(hidden)`
Fixes#126796.
Only the current crate should never be stripped, any other crate should be strippable.
r? ``@notriddle``
Migrate `x86_64-fortanix-unknown-sgx-lvi` `run-make` test to rmake
Part of #121876 and the associated [Google Summer of Code project](https://blog.rust-lang.org/2024/05/01/gsoc-2024-selected-projects.html).
The final Makefile! Every Makefile test is now claimed.
This is difficult to test due to the uncommon architecture it is specific to. I don't think it is in the CI (I didn't find it in `jobs.yml`, but if there is a way to test it, please do.
Locally, on Linux, it compiles and panics at the `llvm_filecheck` part (if I replace the `x86_64-fortanix-unknown-sgx` with `x86_64-unknown-linux-gnu`, of course), which is expected.
For this reason, the Makefile and associated script have been kept, but with a leading underscore.
Allow rust staticlib to work with MSVC's /WHOLEARCHIVE
This fixes#129020 by renaming the `__NULL_IMPORT_DESCRIPTOR` to prevent conflicts.
try-job: dist-i686-msvc
Rollup of 8 pull requests
Successful merges:
- #128432 (WASI: forbid `unsafe_op_in_unsafe_fn` for `std::{os, sys}`)
- #129373 (Add missing module flags for CFI and KCFI sanitizers)
- #129374 (Use `assert_unsafe_precondition!` in `AsciiChar::digit_unchecked`)
- #129376 (Change `assert_unsafe_precondition` docs to refer to `check_language_ub`)
- #129382 (Add `const_cell_into_inner` to `OnceCell`)
- #129387 (Advise against removing the remaining Python scripts from `tests/run-make`)
- #129388 (Do not rely on names to find lifetimes.)
- #129395 (Pretty-print own args of existential projections (dyn-Trait w/ GAT constraints))
r? `@ghost`
`@rustbot` modify labels: rollup
Pretty-print own args of existential projections (dyn-Trait w/ GAT constraints)
Previously we would just drop them. This bug isn't that significant as it can only be triggered by user code that constrains GATs inside trait object types which is currently gated under the interim feature `generic_associated_types_extended` (whose future is questionable) or on stable if the GATs are 'disabled' in dyn-Trait via `where Self: Sized` (in which case the assoc type bindings get ignored anyway (and trigger the warn-by-default lint `unused_associated_type_bounds`)), so yeah.
Affects diagnostic output and output of `std::any::type_name{_of_val}`.
Do not rely on names to find lifetimes.
For some reason, we were trying to find the lifetime parameter from its name, instead of using the def_id we have.
This PR uses it instead. This changes some ui tests, I think to be more sensible.
Advise against removing the remaining Python scripts from `tests/run-make`
After some recent PRs (e.g. #129185), there are only two Python scripts left in `tests/run-make`.
Having come so far, it's tempting to try to get rid of the remaining ones. But after trying that myself, I've come to the conclusion that it's not worth the extra hassle, especially if it means pulling in an XML-parsing crate just for one test.
This PR therefore leaves behind a few signpost comments to explain why getting rid of these particular scripts has low value.
Add missing module flags for CFI and KCFI sanitizers
Set the cfi-normalize-integers and kcfi-offset module flags when Control-Flow Integrity sanitizers are used, so functions generated by the LLVM backend use the same CFI/KCFI options as rustc.
cfi-normalize-integers tells LLVM to also use integer normalization for generated functions when -Zsanitizer-cfi-normalize-integers is used.
kcfi-offset specifies the number of prefix nops between the KCFI type hash and the function entry when -Z patchable-function-entry is used. Note that LLVM assumes all indirectly callable functions use the same number of prefix NOPs with -Zsanitizer=kcfi.
