Fixes#73159
This is similar to #69350 - if the user didn't initially
write out a 'static lifetime, adding 'static in response to
a lifetime error is usually the wrong thing to do.
Add expansion to while desugar spans
In the same vein as #88163, this reverts a change in Clippy behavior as a result of #80357 (and reverts some `#[allow]`s): This changes `clippy::blocks_in_if_conditions` to not fire on `while` loops. Though we might actually want Clippy to lint those cases, we should introduce the change purposefully, with tests, and possibly under a different lint name.
The actual change here is to add a desugaring expansion to the spans when lowering a `while` loop.
r? `@Manishearth`
Add expansion to while desugar spans
In the same vein as #88163, this reverts a change in Clippy behavior as a result of #80357 (and reverts some `#[allow]`s): This changes `clippy::blocks_in_if_conditions` to not fire on `while` loops. Though we might actually want Clippy to lint those cases, we should introduce the change purposefully, with tests, and possibly under a different lint name.
The actual change here is to add a desugaring expansion to the spans when lowering a `while` loop.
r? `@Manishearth`
I think that before this commit, the path `::std::vec::Vec` would have
rendered as `{{root}}::std::vec::Vec`. Now, it should render correctly
as `::std::vec::Vec`.
Update Let's Encrypt ROOT CA certificate in dist-(i686|x86_64)-linux docker images
The DST Root CA X3 used by Let's Encrypt has expired ([Let's Encrypt announcement](https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/)). This patch installs the new root certificate (ISRG Root X1) and disables the old one. Disabling the old one is necessary because otherwise curl still fails to download from servers with Let's Encrypt certs even though they are cross-signed.
Fixes#89484.
These two functions are essentially no-ops (and compile to just a load and
return), but show up in process_obligations profiles with a high call count --
so worthwhile to try and inline them away.
Make `<[T]>::split_at_unchecked` and `<[T]>::split_at_mut_unchecked` public
The methods were originally added in https://github.com/rust-lang/rust/pull/75936 (30dc32b10e), but for some reason as private. Nevertheless, the methods have documentation and even a [tracking issue](https://github.com/rust-lang/rust/issues/76014).
It's very weird to have a tracking issue for private methods and these methods may be useful outside of the standard library. As such, this PR makes the methods public.
Use bitand when checking for signed integer division overflow
For `self == Self::MIN && rhs == -1`, LLVM does not realize that this is the same check made by `self / rhs`, so the code generated may have some unnecessary duplication. For `(self == Self::MIN) & (rhs == -1)`, LLVM realizes it is the same check.
Optimize unnecessary check in Vec::retain
The function `vec::Vec::retain` only have two stages:
1. Nothing was deleted.
2. Some elements were deleted.
Here is an unnecessary check `if g.deleted_cnt > 0` in the loop, and it's difficult for compiler to optimize it. I split the loop into two stages manully and keep the code clean using const generics.
I write a special but common bench case for this optimization. I call retain on vec but keep all elements.
Before and after this optimization:
```
test vec::bench_retain_whole_100000 ... bench: 84,803 ns/iter (+/- 17,314)
```
```
test vec::bench_retain_whole_100000 ... bench: 42,638 ns/iter (+/- 16,910)
```
The result is expected, there are two `if`s before the optimization and one `if` after.
Make diangostic item naming consistent
Right now there is about a 50/50 split of naming diagnostic items as `vec_type` vs `Vec`. So it is hard to guess a diagnostic item name with confidence. I know it's not great to change these retroactively, but I think it will be much easier to maintain consistency after consistency is established.
