Rollup of 7 pull requests #129254
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Rollup of 7 pull requests #129254
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For following:
```rust
struct A;
impl A {
fn test4(&self) {
let mut _file = File::create("foo.txt")?;
//~^ ERROR the `?` operator can only be used in a method
}
```
Suggest:
```rust
impl A {
fn test4(&self) -> Result<(), Box<dyn std::error::Error>> {
let mut _file = File::create("foo.txt")?;
//~^ ERROR the `?` operator can only be used in a method
Ok(())
}
}
```
For rust-lang#125997
The documentation incorrectly stated that std::env::var could return an error for variable names containing '=' or the NUL byte. Copy the correct documentation from var_os. var_os was fixed in Commit 8a7a665, Pull Request rust-lang#109894, which closed Issue rust-lang#109893. This documentation was incorrectly added in commit f2c0f29, which replaced a panic in var_os by returning None, but documented the change as "May error if ...". Reference the specific error values and link to them.
... by using `std::fs::remove_dir_all`, which handles a bunch of edge cases including read-only files and symlinks which are extremely tricky on Windows.
It's only valid when applied to a type or lifetime parameter in `Drop` trait implementation.
Move ZST ABI handling to `rustc_target` Currently, target specific handling of ZST function call ABI (specifically passing them indirectly instead of ignoring them) is handled in `rustc_ty_utils`, whereas all other target specific function call ABI handling is located in `rustc_target`. This PR moves the ZST handling to `rustc_target` so that all the target-specific function call ABI handling is in one place. In the process of doing so, this PR fixes rust-lang#125850 by ensuring that ZST arguments are always correctly ignored in the x86-64 `"sysv64"` ABI; any code which would be affected by this fix would have ICEd before this PR. Tests are also added using `#[rustc_abi(debug)]` to ensure this behaviour does not regress. Fixes rust-lang#125850
…=Amanieu fix: fs::remove_dir_all: treat internal ENOENT as success fixes rust-lang#127576
Suggest adding Result return type for associated method in E0277. Recommit rust-lang#126515 because I messed up during rebase, Suggest adding Result return type for associated method in E0277. For following: ```rust struct A; impl A { fn test4(&self) { let mut _file = File::create("foo.txt")?; //~^ ERROR the `?` operator can only be used in a method } ``` Suggest: ```rust impl A { fn test4(&self) -> Result<(), Box<dyn std::error::Error>> { let mut _file = File::create("foo.txt")?; //~^ ERROR the `?` operator can only be used in a method Ok(()) } } ``` For rust-lang#125997 r? ```@cjgillot```
…rkingjubilee doc: std::env::var: Returns None for names with '=' or NUL byte The documentation incorrectly stated that std::env::var could return an error for variable names containing '=' or the NUL byte. Copy the correct documentation from var_os. var_os was fixed in Commit 8a7a665, Pull Request rust-lang#109894, which closed Issue rust-lang#109893. This documentation was incorrectly added in commit f2c0f29, which replaced a panic in var_os by returning None, but documented the change as "May error if ...". Reference the specific error values and link to them.
…links, r=Kobzol bootstrap: fix clean's remove_dir_all implementation It turns out bootstrap's `clean.rs`'s hand-rolled `rm_rf` (which probably comes before `std::fs::remove_dir_all` was stable) is very broken on native Windows around both read-only files/directories and especially symbolic links. So instead of rolling our own, just use `std::fs::remove_dir_all`. This is a blocker for compiletest's own `rm_rf` implementation rust-lang#129155 which happens to be also buggy, which in turn is a blocker for the rmake.rs test port rust-lang#128562 that heavily exercises symlinks (I was reviewing rust-lang#128562 and testing it on native Windows which is how I found out). I also left a FIXME for `detect_src_and_out` due to a failing assertion on native Windows (opened rust-lang#129188): ``` ---- core::config::tests::detect_src_and_out stdout ---- thread 'core::config::tests::detect_src_and_out' panicked at src\core\config\tests.rs:72:13: assertion `left == right` failed left: "E:\\tmp" right: "C:\\tmp" ``` Fixes rust-lang#112544 (because now we handle Windows symlinks properly). try-job: x86_64-msvc try-job: i686-mingw try-job: test-various try-job: armhf-gnu try-job: aarch64-apple try-job: aarch64-gnu
…piler-errors Check that `#[may_dangle]` is properly applied It's only valid when applied to a type or lifetime parameter in `Drop` trait implementation. Tracking issue: rust-lang#34761 cc rust-lang#34761 (comment)
Typo Fix a typo in a comment.
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…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#125854 (Move ZST ABI handling to `rustc_target`) - rust-lang#127623 (fix: fs::remove_dir_all: treat internal ENOENT as success) - rust-lang#128084 (Suggest adding Result return type for associated method in E0277.) - rust-lang#128902 (doc: std::env::var: Returns None for names with '=' or NUL byte) - rust-lang#129187 (bootstrap: fix clean's remove_dir_all implementation) - rust-lang#129235 (Check that `#[may_dangle]` is properly applied) - rust-lang#129245 (Typo) r? `@ghost` `@rustbot` modify labels: rollup
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Successful merges:
rustc_target#125854 (Move ZST ABI handling torustc_target)#[may_dangle]is properly applied #129235 (Check that#[may_dangle]is properly applied)rustc_hirdoc comment #129245 (Typo)r? @ghost
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