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Add a tidy check for files with over 3,000 lines
Files with a large number of lines can cause issues in GitHub (e.g. https://github.com/rust-lang/rust/issues/60015) and also tend to be indicative of opportunities to refactor into less monolithic structures.
This adds a new check to tidy to warn against files that have more than 3,000 lines, as suggested in https://github.com/rust-lang/rust/issues/60015#issuecomment-483868594. (This number was chosen fairly arbitrarily as a reasonable indicator of size.) This check can be ignored with `// ignore-tidy-filelength`.
Existing files with greater than 3,000 lines currently ignore the check, but this helps us spot when files are getting too large. (We might try to split up all files larger than this in the future, as in https://github.com/rust-lang/rust/issues/60015).
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Make `-Z allow-features` work for stdlib features
r? @cramertj
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Do not allow const generics to depend on type parameters
Fixes https://github.com/rust-lang/rust/issues/60264. In https://github.com/rust-lang/rust/pull/58191/files/b534cf992d0189032207f395c27ed092c89b40c7#diff-aeb0880081a991f34aef2ab889e1fb7a, it was suggested that there might be a better place for this error, but as this bug already affects stable, it's probably worth merging this now, and refactoring afterwards (I can open an issue for this).
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Add feature-gate for f16c target feature
r? @alexcrichton
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Chalkify: Add builtin Copy/Clone
r? @nikomatsakis
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Fix index-page generation
Fixes #60096.
The minifier was minifying crates name in `searchIndex` key position, which was a bit problematic for multiple reasons.
r? @rust-lang/rustdoc
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Set cfg(test) when rustdoc is running with --test option
Following a [discussion on twitter](https://twitter.com/burntsushi5/status/1117091914199785473), I proposed this change. What do you think about it?
r? @QuietMisdreavus
cc @BurntSushi
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Improved error message when type must be bound due to generator.
Fixes #58930.
Keen to get some feedback - is this as minimal as we can get it or is there an existing visitor I could repurpose?
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gate
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Error now mentions type var name and span is highlighted.
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Add guard for missing comma in macro call suggestion
Fix #60233. Follow up to #58796.
r? @oli-obk
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Add regression test for #53249.
Fixes #53249.
r? @cramertj
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r=estebank
Fix #58270, fix off-by-one error in error diagnostics.
This fixes #58270 by checking if two diagnostics overlap completely when we're calculating the line offset for each message.
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Add codegen test for PGO instrumentation.
This PR adds a codegen test that makes sure that LLVM actually generates instrumentation code when we enable PGO instrumentation in `rustc`.
The second commit updates a test case to the new commandline option syntax introduced in #59874. Without the fix the test still works, but it confusingly creates a directory called `test.profraw`, which usually is the name of the _file_ where profiling data is collected.
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tweak unresolved label suggestion
Only suggest label names in the same hygiene context, and use a
structured suggestion.
Question for reviewer: Is this the right way to check for label hygiene?
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This avoids some unnecessary moves
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Fixes an ICE for the following code:
fn foo(_ : &()) {}
static X: fn(&'static ()) = foo;
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Stabilize futures_api
cc https://github.com/rust-lang/rust/issues/59725.
Based on https://github.com/rust-lang/rust/pull/59733 and https://github.com/rust-lang/rust/pull/59119 -- only the last two commits here are relevant.
r? @withoutboats , @oli-obk for the introduction of `rustc_allow_const_fn_ptr`.
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Future-proof MIR for dedicated debuginfo.
This is #56231 without the last commit (the one that actually moves to `VarDebuginfo`).
Nothing should be broken, but it should no longer depend on debuginfo for anything else.
r? @nikomatsakis
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Replace HashMap implementation with SwissTable (as an external crate)
This is the same as #56241 except that it imports `hashbrown` as an external crate instead of copying the implementation into libstd.
This includes a few API changes (all unstable):
- `try_reserve` is added to `HashSet`.
- Some trait bounds have been changed in the `raw_entry` API.
- `search_bucket` has been removed from the `raw_entry` API (doesn't work with SwissTable).
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Warn when ignore-tidy-linelength is present, but no lines are too long
It's easy for a `// ignore-tidy-linelength` to be added when there is a genuine need to ignore a file's line length, but then after refactoring the need is gone, but the tidy directive is not removed. This means that in the future, further editing may accidentally add unnecessarily long lines. This change forces `// ignore-tidy-linelength` to be used exactly when necessary, to make sure such changes are intentional.
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Warn on unused results for operation methods on nums
From a suggestion by @llogiq
Adds a `#[must_use]` attribute to operation methods on integers that take self by value as the first operand and another value as the second. It makes it clear that these methods return the result of the operation instead of mutating `self`, which is the source of a rather embarrassing bug I had in a codebase of mine recently...
As an example:
```rust
struct Int {
value: i64,
}
impl Int {
fn add(&mut self, other: i64) {
self.value.wrapping_add(other);
}
}
```
Will produce a warning like:
```
warning: unused return value of `core::num::<impl i64>::wrapping_add` that must be used
--> src/main.rs:7:7
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7 | self.value.wrapping_add(other);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: #[warn(unused_must_use)] on by default
= note: this returns the result of the operation, without modifying the original
```
If this is something we're on board with, we could do something similar for `f32` and `f64` too. There are probably other methods on integers that make sense.
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[wg-async-await] Drop `async fn` arguments in async block
Fixes #54716.
This PR modifies the HIR lowering (and some other places to make this work) so that unused arguments to a async function are always dropped inside the async move block and not at the end of the function body.
```
async fn foo(<pattern>: <type>) {
async move {
}
} // <-- dropped as you "exit" the fn
// ...becomes...
fn foo(__arg0: <ty>) {
async move {
let <pattern>: <ty> = __arg0;
} // <-- dropped as you "exit" the async block
}
```
However, the exact ordering of drops is not the same as a regular function, [as visible in this playground example](https://play.rust-lang.org/?version=stable&mode=debug&edition=2015&gist=be39af1a58e5d430be1eb3c722cb1ec3) - I believe this to be an unrelated issue. There is a [Zulip topic](https://rust-lang.zulipchat.com/#narrow/stream/187312-t-compiler.2Fwg-async-await/topic/.2354716.20drop.20order) for this.
r? @cramertj
cc @nikomatsakis
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This commit introduces a `assert_drop_order_after_poll` helper function
to the test case for this case to reduce repetitive noise and documents
what each function aims to test.
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Suggest dereferencing when `Deref` is implemented.
Fixes #59819.
r? @oli-obk
cc @estebank
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Don't stop evaluating due to errors before borrow checking
r? @oli-obk
Fix #60005. Follow up to #59903. Blocked on #53708, fixing the ICE in `src/test/ui/consts/match_ice.rs`.
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Disallow double trailing newlines in tidy
This wasn't done previously in https://github.com/rust-lang/rust/pull/47064#issuecomment-354533010 as it affected too many files, but I think it's best to fix it now so that the number of files with double trailing newlines doesn't keep increasing.
r? kennytm
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