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Rollup of 5 pull requests
Successful merges:
- #68712 (Add methods to 'leak' RefCell borrows as references with the lifetime of the original reference)
- #69209 (Miscellaneous cleanup to formatting)
- #69381 (Allow getting `no_std` from the config file)
- #69434 (rustc_metadata: Use binary search from standard library)
- #69447 (Minor refactoring of statement parsing)
Failed merges:
r? @ghost
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Minor refactoring of statement parsing
Extracted out of https://github.com/rust-lang/rust/pull/69445.
r? @estebank
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rustc_metadata: Use binary search from standard library
instead of a hand rolled one.
Noticed while reviewing https://github.com/rust-lang/rust/pull/68941.
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Allow getting `no_std` from the config file
Currently, it is only set correctly in the sanity checking implicit
default fallback code. Having a config file at all will for force
`no_std = false`.
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Miscellaneous cleanup to formatting
Each commit stands alone.
This pull request will also resolve #58320.
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Add methods to 'leak' RefCell borrows as references with the lifetime of the original reference
Usually, references to the interior are only created by the `Deref` and
`DerefMut` impl of the guards `Ref` and `RefMut`. Note that `RefCell`
already has to cope with leaks of such guards which, when it occurs,
effectively makes it impossible to ever acquire a mutable guard or any
guard for `Ref` and `RefMut` respectively. It is already safe to use
this to create a reference to the inner of the ref cell that lives as
long as the reference to the `RefCell` itself, e.g.
```rust
fn leak(r: &RefCell<usize>) -> Option<&usize> {
let guard = r.try_borrow().ok()?;
let leaked = Box::leak(Box::new(guard));
Some(&*leaked)
}
```
The newly added methods allow the same reference conversion without an
indirection over a leaked allocation. It's placed on the `Ref`/`RefMut` to
compose with both borrow and try_borrow directly.
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Audit liballoc for leaks in `Drop` impls when user destructor panics
Inspired by https://github.com/rust-lang/rust/pull/67243 and https://github.com/rust-lang/rust/pull/67235, this audits and hopefully fixes the remaining `Drop` impls in liballoc for resource leaks in the presence of panics in destructors called by the affected `Drop` impl.
This does not touch `Hash{Map,Set}` since they live in hashbrown. They have similar issues though.
r? @KodrAus
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Implement RFC 2532 – Associated Type Defaults
This is a partial implementation that is still missing the changes to object types, since I ran into some trouble while implementing that. I'm opening this part already to get feedback on the implementation and the unexpected test fallout (see my comments below). The remaining changes can be done in a later PR.
Blockers before this can land:
* [x] Resolve unsoundness around interaction with specialization (https://github.com/rust-lang/rust/pull/61812#discussion_r300504010) - #64564
cc https://github.com/rust-lang/rust/issues/29661
Fixes #53907
Fixes #54182
Fixes #62211
Fixes #41868
Fixes #63593
Fixes #47385
Fixes #43924
Fixes #32350
Fixes #26681
Fixes https://github.com/rust-lang/rust/issues/67187
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Rollup of 7 pull requests
Successful merges:
- #67637 (Add primitive module to libcore)
- #69387 (Deduplicate identifier printing a bit)
- #69412 (Mark attributes consumed by `check_mod_attrs` as normal)
- #69423 (syntax: Remove `Nt(Impl,Trait,Foreign)Item`)
- #69429 (remove redundant clones and import)
- #69457 (Clean up e0370 e0371)
- #69468 ([master] Backport release notes of 1.41.1)
Failed merges:
r? @ghost
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Clean up e0370 e0371
r? @Dylan-DPC
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remove redundant clones and import
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syntax: Remove `Nt(Impl,Trait,Foreign)Item`
Follow-up to https://github.com/rust-lang/rust/pull/69366.
r? @Centril
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Mark attributes consumed by `check_mod_attrs` as normal
Take advantage of the fact that `check_mod_attrs` marks attributes as
used and change their type to normal, so that any remaining uses will be
warned about by the unused attribute lint.
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Deduplicate identifier printing a bit
https://github.com/rust-lang/rust/pull/67010 introduced a couple more subtly different ways to print an identifier.
This PR attempts to restore the order.
The most basic identifier printing interface is `Formatter`-based now, so `String`s are not allocated unless required.
r? @Mark-Simulacrum
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Add primitive module to libcore
This re-exports the primitive types from libcore at `core::primitive` to allow
macro authors to have a reliable location to use them from.
Fixes #44865
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Cherry-pick the LLVM fix for #69225
An additional reproducer was provided in #69225 -- the new testcase here -- which still crashes even after #69241 reverted #67174. Now this pull request updates LLVM with the cherry-picked reversion of its own. This is also going to stable in #69444.
I have not tried to reapply #67174 yet -- cc @kraai @shahn
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Update Clippy from 8fbb23f to fc5d0cc
Fixes #69419
```
Fix false positive in `missing_const_for_fn`
Rustup to rust-lang/rust#69366
Add new lint [`wildcard imports`]. Add suggestion to [`enum_glob_use`]
Add new lint `lossy_float_literal` to detect lossy whole number float literals
```
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Rollup of 6 pull requests
Successful merges:
- #69220 (Add documentation for the `-Zself-profile` flag)
- #69391 (Add rustdoc aliases to `ptr::copy` and `ptr::copy_nonoverlapping`)
- #69427 (Cleanup e0368 e0369)
- #69433 (don't explicitly compare against true or false)
- #69435 (Replace uses of Cell::get + Cell::set with Cell::replace.)
- #69437 (no more codegen for miri_start_panic)
Failed merges:
r? @ghost
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submodules: update rls from 10bf331 to 5fde462
Changes:
````
Update cargo.
````
Fixes #69383
Fixes #69286
r? @Xanewok
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Background: targets can be specied with or without config files;
unneccessarily differences in the logic between those cases has caused
a) the bug I tried to fix in the previous commit, b) the bug I
introduced in the previous commit.
The solution is to make the code paths the same as much as possible.
1. Targets are now not created from the `default` method. (I would both
remove the impl if this was a public library, but just wrap it for
convience becaues it's not.) Instead, there is a `from_triple` method
which does the defaulting.
2. Besides the sanity checking, use the new method in the code reading
config files. Now `no_std` is overriden iff set explicitly just like the
other fields which are optional in the TOML AST type.
3. In sanity checking, just populate the map for all targets no matter
what. That way do don't duplicate logic trying to be clever and remember
which targets have "non standard" overrides. Sanity checking is back to
just sanity checking, and out of the game of trying to default too.
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no more codegen for miri_start_panic
With https://github.com/rust-lang/miri/pull/1136 landed, we don't generate code any more for crates that will be run by Miri. So the LLVM backend does not have to implement the `miri_start_panic` intrinsic any more.
Cc @Aaron1011
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Replace uses of Cell::get + Cell::set with Cell::replace.
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don't explicitly compare against true or false
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Cleanup e0368 e0369
r? @Dylan-DPC
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Add rustdoc aliases to `ptr::copy` and `ptr::copy_nonoverlapping`
This PR adds a [rustdoc alias](https://doc.rust-lang.org/nightly/rustdoc/unstable-features.html#add-aliases-for-an-item-in-documentation-search) to `ptr::copy` and `ptr::copy_nonoverlapping` using the commonly used terms `memcpy` and `memmove`. The motivation for this PR is to improve discoverability for these functions, since I've noticed users overlook these functions on multiple occasions (and they have thus reached for [libc](https://crates.io/crates/libc) without need). Currently std docs state:
https://doc.rust-lang.org/nightly/std/ptr/fn.copy_nonoverlapping.html
> `copy_nonoverlapping` is semantically equivalent to C's `memcpy`, but with the argument order swapped.
https://doc.rust-lang.org/nightly/std/ptr/fn.copy.html
> `copy` is semantically equivalent to C's `memmove`, but with the argument order swapped.
#### search results before adding a rustdoc alias:
#### after adding `#[doc(alias = "memcpy")]` and `#[doc(alias = "memmove")]`:
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r=nikomatsakis
Add documentation for the `-Zself-profile` flag
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instead of a hand rolled one.
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bump Miri
Fixes https://github.com/rust-lang/rust/issues/69331
r? @ghost Cc @oli-obk
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Changes:
````
Update cargo.
````
Fixes #69383
Fixes #69286
r? @Xanewok
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docs: Stdin::read_line: mention the appending
The fact that `stdin().read_line()` is an [unpleasant](https://twitter.com/Michcioperz/status/1231646797661167617?s=20) [footgun](https://rustbattle.net/battle/straight-finch-8-e4f4). Let's make it clearer in the documentation.
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Clean up E0367 explanation
r? @Dylan-DPC
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