Append .dwp to the binary filename instead of replacing the existing extension.
gdb et al. expect to find the dwp file at `<binary>`.dwp, even if <binary> already has an extension (e.g. libfoo.so's dwp is expected to be at libfoo.so.dwp).
Avoid __cxa_thread_atexit_impl on Emscripten
- Fixes https://github.com/rust-lang/rust/issues/91628.
- Fixes https://github.com/emscripten-core/emscripten/issues/15722.
See discussion in both issues.
The TL;DR is that weak linkage causes LLVM to produce broken Wasm, presumably due to pointer mismatch. The code is casting a void pointer to a function pointer with specific signature, but Wasm is very strict about function pointer compatibility, so the resulting code is invalid.
Ideally LLVM should catch this earlier in the process rather than emit invalid Wasm, but it currently doesn't and this is an easy and valid fix, given that Emcripten doesn't have `__cxa_thread_atexit_impl` these days anyway.
Unfortunately, I can't add a regression test as even after looking into this issue for a long time, I couldn't reproduce it with any minimal Rust example, only with extracted LLVM IR or on a large project involving Rust + C++.
impl DispatchFromDyn for Cell and UnsafeCell
After some fruitful discussion on [Internals](https://internals.rust-lang.org/t/impl-dispatchfromdyn-for-cell-2/16520) here's my first PR to rust-lang/rust 🎉
Please let me know if there's something I missed.
This adds `DispatchFromDyn` impls for `Cell`, `UnsafeCell` and `SyncUnsafeCell`.
An existing test is also expanded to test the `Cell` impl (which requires the `UnsafeCell` impl)
The different `RefCell` types can not implement `DispatchFromDyn` since they have more than one (non ZST) field.
**Edit:**
### What:
These changes allow one to make types like `MyRc`(code below), to be object safe method receivers after implementing `DispatchFromDyn` and `Deref` for them.
This allows for code like this:
```rust
struct MyRc<T: ?Sized>(Cell<NonNull<RcBox<T>>>);
/* impls for DispatchFromDyn, CoerceUnsized and Deref for MyRc*/
trait Trait {
fn foo(self: MyRc<Self>);
}
let impls_trait = ...;
let rc = MyRc::new(impls_trait) as MyRc<dyn Trait>;
rc.foo();
```
Note: `Cell` and `UnsafeCell` won't directly become valid method receivers since they don't implement `Deref`. Making use of these changes requires a wrapper type and nightly features.
### Why:
A custom pointer type with interior mutability allows one to store extra information in the pointer itself.
These changes allow for such a type to be a method receiver.
### Examples:
My use case is a cycle aware custom `Rc` implementation that when dropping a cycle marks some references dangling.
On the [forum](https://internals.rust-lang.org/t/impl-dispatchfromdyn-for-cell/14762/8) andersk mentioned that they track if a `Gc` reference is rooted with an extra bit in the reference itself.
InstCombine away intrinsic validity assertions
This optimization (currently) fires 246 times on the standard library. It seems to fire hardly at all on the big crates in the benchmark suite. Interesting.
Rollup of 9 pull requests
Successful merges:
- #105345 (Add hint for missing lifetime bound on trait object when type alias is used)
- #106897 (Tweak E0597)
- #106944 (Suggest using a lock for `*Cell: Sync` bounds)
- #107239 (Bring tests back into rustc source tarball)
- #107244 (rustdoc: rearrange HTML in primitive reference links)
- #107255 (add test where we ignore hr implied bounds)
- #107256 (Delete `SimplifyArmIdentity` and `SimplifyBranchSame` mir opts)
- #107266 (rustdoc: prohibit scroll bar on source viewer in Safari)
- #107282 (erica solver: implement builtin `Pointee` trait impl candidates)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Delete `SimplifyArmIdentity` and `SimplifyBranchSame` mir opts
I had attempted to fix the first of these opts in #94177 . However, despite that PR already being a full re-write, it still did not fix some of the core soundness issues. The optimizations that are attempted here are likely to be desirable, but I do not expect any of the currently written code to survive into a sound implementation. Deleting the code keeps us from having to maintain the passes in the meantime.
Closes#77359 , closes#72800 , closes#78628
r? ```@cjgillot```
rustdoc: rearrange HTML in primitive reference links
This patch avoids hard-to-click single character links by making the generic part of the link:
Before: <a href="#">&</a>T
After: <a href="#">&T</a>
Suggest using a lock for `*Cell: Sync` bounds
I mostly did this for `OnceCell<T>` at first because users will be confused to see that the `OnceCell<T>` in `std` isn't `Sync` but then extended it to `Cell<T>` and `RefCell<T>` as well.
Add hint for missing lifetime bound on trait object when type alias is used
Fix issue #103582.
The problem: When a type alias is used to specify the return type of the method in a trait impl, the suggestion for fixing the problem of "missing lifetime bound on trait object" of the trait impl will not be created. The issue caused by the code which searches for the return trait objects when constructing the hint suggestion is not able to find the trait objects since they are specified in the type alias path instead of the return path of the trait impl.
The solution: Trace the trait objects in the type alias path and provide them along with the alias span to generate the suggestion in case the type alias is used in return type of the method in the trait impl.
use `LocalDefId` instead of `HirId` in trait resolution to simplify the obligation clause resolution
This commit introduces a refactoring suggested by `@lcnr` to simplify the obligation clause resolution.
This is just the first PR that introduces a type of refactoring, but others PRs will follow this to introduce name changing to change from the variable name from `body_id` to something else.
Fixes https://github.com/rust-lang/rust/issues/104827
Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
`@rustbot` r? `@lcnr`
rustdoc: simplify settings popover DOM, CSS, JS
* Change the class names so that they all start with `setting-`. That should make it harder to accidentally use a setting class outside the settings popover, where loading the CSS might accidentally change the styles of something unrelated.
* Get rid of an unnecessary wrapper DIV around the radio button line.
* Simplify CSS selectors by making the DOM easier and more intuitive to target.
* Remove dead settings JS for obsolete select-wrapper
`sub_ptr()` is equivalent to `usize::try_from().unwrap_unchecked()`, not `usize::from().unwrap_unchecked()`
`usize::from()` gives a `usize`, not `Result<usize>`, and `usize: From<isize>` is not implemented.
Add suggestion to remove if in let..else block
Adds an additional hint to failures where we encounter an else keyword while we're parsing an if-let expression.
This is likely that the user has accidentally mixed if-let and let..else together.
Fixes#103791.
rustc_metadata: Support non-`Option` nullable values in metadata tables
This is a convenience feature for cases in which "no value in the table" and "default value in the table" are equivalent.
Tables using `Table<DefIndex, ()>` are migrated in this PR, some other cases can be migrated later.
This helps `DocFlags` in https://github.com/rust-lang/rust/pull/107136 in particular.
Allow fmt::Arguments::as_str() to return more Some(_).
This adjusts the documentation to allow optimization of format_args!() to be visible through fmt::Arguments::as_str().
This allows for future changes like https://github.com/rust-lang/rust/pull/106824.
Allow setting CFG_DISABLE_UNSTABLE_FEATURES to 0
Two locations check whether this build-time environment variable is defined. Allowing it to be explicitly disabled with a "0" value is useful, especially for integrating with external build systems.
Update cargo
11 commits in 985d561f0bb9b76ec043a2b12511790ec7a2b954..3c5af6bed9a1a243a693e8e22ee2486bd5b82a6c 2023-01-20 14:39:28 +0000 to 2023-01-24 15:48:15 +0000
- Add a note about verifying your email address on crates.io (rust-lang/cargo#11620)
- Improve CI caching by skipping mtime checks for paths in $CARGO_HOME (rust-lang/cargo#11613)
- test: Update for clap 4.1.3 (rust-lang/cargo#11619)
- Fix unused attribute on Windows. (rust-lang/cargo#11614)
- [Doc]: Added links to the `Target` section of the glossary for occurences of `target triple` (rust-lang/cargo#11603)
- feat: stabilize auto fix note (rust-lang/cargo#11558)
- Clarify the difference between CARGO_CRATE_NAME and CARGO_PKG_NAME (rust-lang/cargo#11576)
- Temporarily pin libgit2-sys. (rust-lang/cargo#11609)
- Disable network SSH tests on windows. (rust-lang/cargo#11610)
- fix(toml): Add `default-features` to `TomlWorkspaceDependency` (rust-lang/cargo#11409)
- doc(contrib): remove rls in release process (rust-lang/cargo#11601)
r? `@ghost`
11 commits in 985d561f0bb9b76ec043a2b12511790ec7a2b954..3c5af6bed9a1a243a693e8e22ee2486bd5b82a6c
2023-01-20 14:39:28 +0000 to 2023-01-24 15:48:15 +0000
- Add a note about verifying your email address on crates.io (rust-lang/cargo#11620)
- Improve CI caching by skipping mtime checks for paths in $CARGO_HOME (rust-lang/cargo#11613)
- test: Update for clap 4.1.3 (rust-lang/cargo#11619)
- Fix unused attribute on Windows. (rust-lang/cargo#11614)
- [Doc]: Added links to the `Target` section of the glossary for occurences of `target triple` (rust-lang/cargo#11603)
- feat: stabilize auto fix note (rust-lang/cargo#11558)
- Clarify the difference between CARGO_CRATE_NAME and CARGO_PKG_NAME (rust-lang/cargo#11576)
- Temporarily pin libgit2-sys. (rust-lang/cargo#11609)
- Disable network SSH tests on windows. (rust-lang/cargo#11610)
- fix(toml): Add `default-features` to `TomlWorkspaceDependency` (rust-lang/cargo#11409)
- doc(contrib): remove rls in release process (rust-lang/cargo#11601)
- On compiler-error's suggestion of moving this lower down the stack,
along the path of `report_mismatched_types()`, which is used
by `rustc_hir_analysis` and `rustc_hir_typeck`.
- update ui tests, add test
- add suggestions for references to fn pointers
- modify `TypeErrCtxt::same_type_modulo_infer` to take `T: relate::Relate` instead of `Ty`
Adds an additional hint to failures where we encounter an else keyword
while we're parsing an if-let block.
This is likely that the user has accidentally mixed if-let and let...else
together.
