Suggest trait bounds for used associated type on type param
Fix#101351.
When an associated type on a type parameter is used, and the type parameter isn't constrained by the correct trait, suggest the appropriate trait bound:
```
error[E0220]: associated type `Associated` not found for `T`
--> file.rs:6:15
|
6 | field: T::Associated,
| ^^^^^^^^^^ there is a similarly named associated type `Associated` in the trait `Foo`
|
help: consider restricting type parameter `T`
|
5 | struct Generic<T: Foo> {
| +++++
```
When an associated type on a type parameter has a typo, suggest fixing
it:
```
error[E0220]: associated type `Baa` not found for `T`
--> $DIR/issue-55673.rs:9:8
|
LL | T::Baa: std::fmt::Debug,
| ^^^ there is a similarly named associated type `Bar` in the trait `Foo`
|
help: change the associated type name to use `Bar` from `Foo`
|
LL | T::Bar: std::fmt::Debug,
| ~~~
```
Enable triagebot no-merges check
Follow-up on https://github.com/rust-lang/triagebot/pull/1704
### Motivation
Occasionally, a merge commit like cb5c011670 makes it past manual review and gets merged into master.
At one point, we tried adding a check to CI to prevent this from happening (https://github.com/rust-lang/rust/pull/105058), but that ended up [problematic](https://github.com/rust-lang/rust/pull/106319#issuecomment-1368144076) and was [reverted](https://github.com/rust-lang/rust/pull/106320). This kind of check is simply too fragile for CI, and there must be a way for a human to override the bot's decision.
The capability to detect and warn about merge commits has been present in triagebot for quite some time, but was never enabled at rust-lang/rust, possibly due to concerns about false positives on rollup and subtree sync PRs. This PR intends to alleviate those concerns.
### Configuration
This configuration will exclude rollup PRs and subtree sync PRs from merge commit detection, and it will post the default warning message and add the `has-merge-commits` and `S-waiting-on-author` labels when merge commits are detected on other PRs.
The eventual vision is to have bors refuse to merge if the `has-merge-commits` label is present. A reviewer can still force the merge by removing that label if they so wish.
### Note for contributors
The rollup tool should add that label automatically, but anyone performing subtree updates should begin including "subtree update" in the titles of those PRs, to avoid false positives.
r? infra
## Open Questions
1. This configuration uses the default message that's built into triagebot:
> There are merge commits (commits with multiple parents) in your changes. We have a [no merge policy](https://rustc-dev-guide.rust-lang.org/git.html#no-merge-policy) so these commits will need to be removed for this pull request to be merged.
>
> You can start a rebase with the following commands:
> ```shell-session
> $ # rebase
> $ git rebase -i master
> $ # delete any merge commits in the editor that appears
> $ git push --force-with-lease
> ```
Any changes to this are easy, I'll just have to add a `message` option. Should we mention the excluded titles in the message?
don't UB on dangling ptr deref, instead check inbounds on projections
This implements https://github.com/rust-lang/reference/pull/1387 in Miri. See that PR for what the change is about.
Detecting dangling references in `let x = &...;` is now done by validity checking only, so some tests need to have validity checking enabled. There is no longer inherently a "nodangle" check in evaluating the expression `&*ptr` (aside from the aliasing model).
r? `@oli-obk`
Based on:
- https://github.com/rust-lang/reference/pull/1387
- https://github.com/rust-lang/rust/pull/115524
interpret: clean up AllocBytes
Fixes https://github.com/rust-lang/miri/issues/2836
Nothing has moved here in half a year, so let's just remove these unused stubs -- they need a proper re-design anyway.
r? `@oli-obk`
Rollup of 3 pull requests
Successful merges:
- #115196 (Suggest adding `return` if the for semi which can coerce to the fn return type)
- #115955 (Stabilize `{IpAddr, Ipv6Addr}::to_canonical`)
- #116776 (Enable `review-requested` feature for rustbot)
r? `@ghost`
`@rustbot` modify labels: rollup
Stabilize `{IpAddr, Ipv6Addr}::to_canonical`
Make `IpAddr::to_canonical` and `IpV6Addr::to_canonical` stable (+const), as well as const stabilize `Ipv6Addr::to_ipv4_mapped`.
Newly stable API:
```rust
impl IpAddr {
// Newly stable under `ip_to_canonical`
const fn to_canonical(&self) -> IpAddr;
}
impl Ipv6Addr {
// Newly stable under `ip_to_canonical`
const fn to_canonical(&self) -> IpAddr;
// Already stable, this makes it const stable under
// `const_ipv6_to_ipv4_mapped`
const fn to_ipv4_mapped(&self) -> Option<Ipv4Addr>
}
```
These stabilize a subset of the following tracking issues:
- https://github.com/rust-lang/rust/issues/27709
- https://github.com/rust-lang/rust/issues/76205
Stabilization of all methods under the `ip` gate was attempted once at https://github.com/rust-lang/rust/pull/66584 then again at https://github.com/rust-lang/rust/pull/76098. These were not successful because there are still unknowns about `is_documentation` `is_benchmarking` and similar; `to_canonical` is much more straightforward.
I have looked and could not find any known issues with `to_canonical`. These were added in 2021 in https://github.com/rust-lang/rust/pull/87708
cc implementor ``@the8472``
r? libs-api
``@rustbot`` label +T-libs-api +needs-fcp
Inline `Bytes::next` and `Bytes::size_hint`.
This greatly increases its speed. On one small test program using `Bytes::next` to iterate over a large file, execution time dropped from ~330ms to ~220ms.
r? `@the8472`
impl Default for ExitCode
As suggested here
https://github.com/rust-lang/rust/pull/106425#issuecomment-1382952598
Needs FCP since this is an insta-stable impl.
Ideally we would have `impl From<ExitCode> for ExitStatus` and implement the default `ExitStatus` using that. That is sadly not so easy because of the various strange confusions about `ExitCode` (unix: exit status) vs `ExitStatus` (unix: wait status) in the not-really-unix platforms in `library//src/sys/unix/process`. I'll try to follow that up.
This configuration will exclude rollup PRs and subtree sync PRs from
merge commit detection. On other PRs, it will post the default warning
message and add the `has-merge-commits` and `S-waiting-on-author`
labels when merge commits are detected.
The eventual vision is to have bors refuse to merge if the
`has-merge-commits` label is present. A reviewer can still
force the merge by removing that label if they so wish.
impl Not, Bit{And,Or}{,Assign} for IP addresses
ACP: rust-lang/libs-team#235
Note: since these are insta-stable, these require an FCP.
Implements, where `N` is either `4` or `6`:
```rust
impl Not for IpvNAddr
impl Not for &IpvNAddr
impl BitAnd<IpvNAddr> for IpvNAddr
impl BitAnd<&IpvNAddr> for IpvNAddr
impl BitAnd<IpvNAddr> for &IpvNAddr
impl BitAnd<&IpvNAddr> for &IpvNAddr
impl BitAndAssign<IpvNAddr> for IpvNAddr
impl BitAndAssign<&IpvNAddr> for IpvNAddr
impl BitOr<IpvNAddr> for IpvNAddr
impl BitOr<&IpvNAddr> for IpvNAddr
impl BitOr<IpvNAddr> for &IpvNAddr
impl BitOr<&IpvNAddr> for &IpvNAddr
impl BitOrAssign<IpvNAddr> for IpvNAddr
impl BitOrAssign<&IpvNAddr> for IpvNAddr
```
It's a better name, and lets "active features" refer to the features
that are active in a particular program, due to being declared or
enabled by the edition.
The commit also renames `Features::enabled` as `Features::active` to
match this; I changed my mind and have decided that "active" is a little
better thatn "enabled" for this, particularly because a number of
pre-existing comments use "active" in this way.
Finally, the commit renames `Status::Stable` as `Status::Accepted`, to
match `ACCEPTED_FEATURES`.
`State` is used to distinguish active vs accepted vs removed features.
However, these can also be distinguished by their location, in
`ACTIVE_FEATURES`, `ACCEPTED_FEATURES`, and `REMOVED_FEATURES`.
So this commit removes `State` and moves the internals of its variants
next to the `Feature` in each element of `*_FEATURES`, introducing new
types `ActiveFeature` and `RemovedFeature`. (There is no need for
`AcceptedFeature` because `State::Accepted` had no fields.)
This is a tighter type representation, avoids the need for some runtime
checks, and makes the code a bit shorter.
Remove me from libcore review rotation
I'm looking at my commitments right now, and unfortunately this needs to go for at least a while.
If there's something in particular I can probably still take them, but I should drop out of the rotation for now.
Make x capable of resolving symlinks
When bootstrapping from outside of the rust source, instead of calling 'x' from the absolute path
(like /home/user/rust/x), we should be able to link 'x' from the rust source to binary paths so it can be used easily. Before this change, 'x' was not capable of finding 'x.py' when called from the linked file.
use `PatKind::Error` when an ADT const value has violation
Fixes#115599
Since the [to_pat](https://github.com/rust-lang/rust/pull/111913/files#diff-6d8d99538aca600d633270051580c7a9e40b35824ea2863d9dda2c85a733b5d9R126-R155) behavior has been changed in the #111913 update, the kind of `inlined_const_ast_pat` has transformed from `PatKind::Leaf { pattern: Pat { kind: Wild, ..} } ` to `PatKind::Constant`. This caused a scenario where there are no matched candidates, leading to a testing of the candidates. This process ultimately attempts to test the string const, triggering the `bug!` invocation finally.
r? ``@oli-obk``
Implement sys::args for UEFI
- Uses `EFI_LOADED_IMAGE_PROTOCOL`, which is implemented for all loaded images.
Tested on qemu with OVMF
cc ``@nicholasbishop``
cc ``@dvdhrm``
Broaden the consequences of recursive TLS initialization
This PR updates the documentation of `LocalKey` to clearly disallow the behaviour described in [this comment](https://github.com/rust-lang/rust/issues/110897#issuecomment-1525738849). This allows using `OnceCell` for the lazy initialization of TLS variables, which panics on reentrant initialization instead of updating the value like TLS variables currently do.
``@rustbot`` label +T-libs-api
r? ``@m-ou-se``
error[E0711]: feature `process-exitcode-default` is declared stable since 1.74.0-beta.1, but was previously declared stable since 1.73.0
--> library/std/src/process.rs:1964:1
|
1964 | #[stable(feature = "process-exitcode-default", since = "CURRENT_RUSTC_VERSION")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Implement FusedIterator for DecodeUtf16 when the inner iterator does
I have just implemented an iterator that wraps `DecodeUtf16` and wanted to implement `FusedIterator` for my iterator when I noticed that `DecodeUtf16` currently doesn't implement `FusedIterator` at all.
A quick look at the code of `DecodeUtf16` revealed that `DecodeUtf16::next` only returns `None` when its inner iterator returns `None`:
3462f79e94/library/core/src/char/decode.rs (L45)
As a result, we can implement `FusedIterator` for `DecodeUtf16` when the inner iterator does.
I'm following the example of #96397 here and consider this change minor and non-controversial, which is why I haven't added an RFC. I have also added the required feature name (`"decode_utf16_fused_iterator"`), however without adding a chapter to the Rust Unstable book (same as #96397).
Format all the let-chains in compiler crates
Since rust-lang/rustfmt#5910 has landed, soon we will have support for formatting let-chains (as soon as rustfmt syncs and beta gets bumped).
This PR applies the changes [from master rustfmt to rust-lang/rust eagerly](https://rust-lang.zulipchat.com/#narrow/stream/122651-general/topic/out.20formatting.20of.20prs/near/374997516), so that the next beta bump does not have to deal with a 200+ file diff and can remain concerned with other things like `cfg(bootstrap)` -- #113637 was a pain to land, for example, because of let-else.
I will also add this commit to the ignore list after it has landed.
The commands that were run -- I'm not great at bash-foo, but this applies rustfmt to every compiler crate, and then reverts the two crates that should probably be formatted out-of-tree.
```
~/rustfmt $ ls -1d ~/rust/compiler/* | xargs -I@ cargo run --bin rustfmt -- `@/src/lib.rs` --config-path ~/rust --edition=2021 # format all of the compiler crates
~/rust $ git checkout HEAD -- compiler/rustc_codegen_{gcc,cranelift} # revert changes to cg-gcc and cg-clif
```
cc `@rust-lang/rustfmt`
r? `@WaffleLapkin` or `@Nilstrieb` who said they may be able to review this purely mechanical PR :>
cc `@Mark-Simulacrum` and `@petrochenkov,` who had some thoughts on the order of operations with big formatting changes in https://github.com/rust-lang/rust/pull/95262#issue-1178993801. I think the situation has changed since then, given that let-chains support exists on master rustfmt now, and I'm fairly confident that this formatting PR should land even if *bootstrap* rustfmt doesn't yet format let-chains in order to lessen the burden of the next beta bump.
Fix a spot I wrote the wrong word
I was reading this comment while I was looking at #116505, and it garden-path-sentence'd me, so fix that for people in the future.
