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Ensure the core::ffi::VaList structure passes the improper_ctypes lint.
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Was then able to the minimise the reproduction a little further.
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This was one of the unresolved questions of https://github.com/rust-lang/rfcs/pull/2480.
As the RFC says this is maybe not useful in the sense that we are unlikely
to ever have a second version, but making the crate a true subset
makes one less issue to think about if we stabilize it and later
want to merge standard library crates and have Cargo feature flags
to enable or disable parts of the `std` crate.
See also discussion in https://github.com/rust-lang/rust/pull/58175
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Relax Read bounds on a bunch of BufReader<R> methods
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Fix #58712.
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proc macro to execute them
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In bluss/indexmap#88, we found that there was no easy way to implement
`Debug` for our `IterMut` and `Drain` iterators. Those are built on
`slice::IterMut` and `vec::Drain`, which implement `Debug` themselves,
but have no other way to access their data. With a new `as_slice()`
method, we can read the data and customize its presentation.
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This code no longer ICEs, and @yodaldevoid found that it was fixed by
commit fe5710a. While that added a similar test, we can explicitly test
this reproducer too.
Closes #50582.
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Point at enum definition when match patterns are not exhaustive
```
error[E0004]: non-exhaustive patterns: type `X` is non-empty
--> file.rs:9:11
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1 | / enum X {
2 | | A,
| | - variant not covered
3 | | B,
| | - variant not covered
4 | | C,
| | - variant not covered
5 | | }
| |_- `X` defined here
...
9 | match x {
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= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
error[E0004]: non-exhaustive patterns: `B` and `C` not covered
--> file.rs:11:11
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1 | / enum X {
2 | | A,
3 | | B,
4 | | C,
| | - not covered
5 | | }
| |_- `X` defined here
...
11 | match x {
| ^ patterns `C` not covered
```
When a match expression doesn't have patterns covering every variant,
point at the enum's definition span. On a best effort basis, point at the
variant(s) that are missing. This does not handle the case when the missing
pattern is due to a field's enum variants:
```
enum E1 {
A,
B,
C,
}
enum E2 {
A(E1),
B,
}
fn foo() {
match E2::A(E1::A) {
E2::A(E1::B) => {}
E2::B => {}
}
//~^ ERROR `E2::A(E1::A)` and `E2::A(E1::C)` not handled
}
```
Unify look between match with no arms and match with some missing patterns.
Fix #37518.
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Update Clippy
Should fix the fallout caused by https://github.com/rust-lang/rust/pull/58321 (still testing it locally).
r? @oli-obk
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This allows us to e.g. test compiletest, including doctests, in stage 0
without building a fresh compiler and rustdoc.
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This avoids building compilers that we don't need -- most tools will work
just fine with the downloaded compiler.
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[NLL] Remove `LiveVar`
The `LiveVar` type (and related) made it harder to reason about the code. It seemed as an abstraction that didn't bring any useful concept to the reader (when transitioning from the RFC theory to the actual implementation code).
It achieved a compactness in the vectors storing the def/use/drop information that was related only to the `LocalUseMap`. This PR went in the other direction and favored time over memory (but this decision can be easily reverted to the other side without reintroducing `LiveVar`).
What this PR aims at is to clarify that there's no significant transformation between the MIR `Local` and the `LiveVar` (now refactored as `live_locals: Vec<Local>`): we're just filtering (not mapping) the entire group of `Local`s into a meaningful subset that we should perform the liveness analysis on.
As a side note, there is no guarantee that the liveness analysis is performed only on (what the code calls) "live" variables, if the NLL facts are requested it will be performed on *any* variable so there can't be any assumptions on that regard. (Still, this PR didn't change the general naming convention to reduce the number of changes here and streamline the review process).
**Acceptance criteria:** This PR attempts to do only a minor refactoring and not to change the logic so it can't have any performance impact, particularly, it can't lose any of the significant performance improvement achieved in the great work done in https://github.com/rust-lang/rust/pull/52115.
r? @nikomatsakis
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This also ensure that dropping a generator won't leak upvars if dropping
one of them panics
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The example had a potential race condition that would still pass the test.
If the thread which was supposed to modify it's own thread local was slower than the instruction to
modify in the main thread, then the test would pass even in case of a failure.
This is would be minor if the child thread was waited for since it check using an `assert_eq` for
the same thing, but vice versa.
However, if the `assert_eq` failed this would trigger a panic, which is not at all caught by the
example since the thread is not waited on.
Signed-off-by: benaryorg <binary@benary.org>
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[self-profiler] Make the profiler faster/more efficient
Related to #58372
r? @michaelwoerister
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[NLL] Type check operations with pointer types
It seems these were forgotten about. Moving to `Rvalue::AddressOf` simplifies the coercions from references, but I want this to be fixed as soon as possible.
r? @pnkfelix
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Part of #58372
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Related to #58372
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