The cfg isn't actually necessary, since `--emit=metadata` does not
actually do enough validation for it to fail on any platform. However,
I feel a little more comfortable leaving it in.
Unhide the feature flag, since I think that is important to display.
This stabilizes:
* `OnceState`
* `OnceState::is_poisoned()` (previously named `poisoned()`)
* `Once::call_once_force()`
`poisoned()` was renamed because the new name is more clear as a few
people agreed and nobody objected.
Closes#33577
As it is a safe trait it does not provide any guarantee that the
returned length is correct and as such unsafe code must not rely on it.
That's why `TrustedLen` exists.
Fixes https://github.com/rust-lang/rust/issues/81739
For better throughput during parallel processing by LLVM, we used to sort
CGUs largest to smallest. This would lead to better thread utilization
by, for example, preventing a large CGU from being processed last and
having only one LLVM thread working while the rest remained idle.
However, this strategy would lead to high memory usage, as it meant the
LLVM-IR for all of the largest CGUs would be resident in memory at once.
Instead, we can compromise by ordering CGUs such that the largest and
smallest are first, second largest and smallest are next, etc. If there
are large size variations, this can reduce memory usage significantly.
This extends the `panic_fmt` lint to warn for all cases where the first
argument cannot be interpreted as a format string, as will happen in
Rust 2021.
It suggests to add `"{}", ` to format the message as a string. In the
case of `std::panic!()`, it also suggests the recently stabilized
`std::panic::panic_any()` function as an alternative.
It renames the lint to `non_fmt_panic` to match the lint naming
guidelines.
(Test was silently ignored on Linux CI prior to parent commit that switched to
using `# min-llvm-version`. But the switch made the ignoring stop, exposing
other brokenness in the form of bash-dependent syntax in the `$(shell ...)`
invocations.)
Fix panic when emitting diagnostic for closure mutable binding error
Fixes#81700
The upvar borrow kind may be `ty::BorrowKind::UniqueImmBorrow`, which is
still a mutable borrow for the purposes of this diagnostic code.
Fix non-existent-field ICE for generic fields.
I mentioned this ICE in a chat and it took about 3 milliseconds before `@eddyb` found the problem and said this change would fix it. :)
This also changes one the field types in the related test to one that triggered the ICE.
Fixes#81627.
Fixes#81672.
Fixes#81709.
Cc https://github.com/rust-lang/rust/pull/81480 `@b-naber` `@estebank.`
Reduce tab formatting assertions to debug only
The tab replacement for diagnostics added in #79757 included a few assertions to ensure all tab characters are handled appropriately. We've started getting reports of these assertions firing (#81614). Since it's only a cosmetic issue, this downgrades the assertions to debug only, so we at least continue compiling even if the diagnostics might be a tad wonky.
Minimizes the impact of #81614
Remove incorrect `delay_span_bug`
The following code is supposed to compile
```rust
use std::ops::BitOr;
pub trait IntWrapper {
type InternalStorage;
}
impl<T> BitOr for dyn IntWrapper<InternalStorage = T>
where
Self: Sized,
T: BitOr + BitOr<Output = T>,
{
type Output = Self;
fn bitor(self, _other: Self) -> Self {
todo!()
}
}
```
Before this change it would ICE. In #70998 the removed logic was added
to provide better suggestions, and the `delay_span_bug` guard was added
to protect against a potential logic error when returning traits. As it
happens, there are cases, like the one above, where traits can indeed be
returned, so valid code was being rejected.
Fix (but not close) #80207.
make const_err a future incompat lint
This is the first step for https://github.com/rust-lang/rust/issues/71800: make const_err a future-incompat lint. I also rewrote the const_err lint description as the old one seemed wrong.
This has the unfortunate side-effect of making const-eval error even more verbose by making the const_err message longer without fixing the redundancy caused by additionally emitting an error on each use site of the constant. We cannot fix that redundancy until const_err is a *hard* error (at that point the error-on-use-site can be turned into a `delay_span_bug!` for uses of monomorphic consts, and into a nicely rendered error for [lazily / post-monomorhization evaluated] associated consts).
~~The one annoying effect of this PR is that `let _x = &(1/(1-1));` now also shows the future-incompat warning, even though of course we will *not* make this a hard error. We'll instead (hopefully) stop promoting it -- see https://github.com/rust-lang/rfcs/pull/3027. The only way I see to avoid the future-incompat warning is to use a different lint for "failure to evaluate promoted".~~
Cc `@rust-lang/wg-const-eval`
The tab replacement for diagnostics added in #79757 included a few assertions to
ensure all tab characters are handled appropriately. We've started getting
reports of these assertions firing (#81614). Since it's only a cosmetic issue,
this downgrades the assertions to debug only, so we at least continue compiling
even if the diagnostics might be a tad wonky.
Fixes#81614
The following code is supposed to compile
```rust
use std::ops::BitOr;
pub trait IntWrapper {
type InternalStorage;
}
impl<T> BitOr for dyn IntWrapper<InternalStorage = T>
where
Self: Sized,
T: BitOr + BitOr<Output = T>,
{
type Output = Self;
fn bitor(self, _other: Self) -> Self {
todo!()
}
}
```
Before this change it would ICE. In #70998 the removed logic was added
to provide better suggestions, and the `delay_span_bug` guard was added
to protect against a potential logic error when returning traits. As it
happens, there are cases, like the one above, where traits can indeed be
returned, so valid code was being rejected.
Fix#80207.
Per a comment on #70516 this changes `eq_ignore_ascii_case` to take the generic parameter `S: AsRef<OsStr>` by value instead of by reference.
This is technically a breaking change to an unstable method. I think the only way it would break is if you called this method with an explicit type parameter, ie `my_os_str.eq_ignore_ascii_case::<str>("foo")` becomes `my_os_str.eq_ignore_ascii_case::<&str>("foo")`.
Besides that, I believe it is overall more flexible since it can now take an owned `OsString` for example.
If this change should be made in some other PR (like #80193) then please just close this.
