Handle inactive enum variants in `MaybeUninitializedPlaces`
Resolves the first part of #69715.
This is the equivalent of #68528 but for `MaybeUninitializedPlaces`. Because we now notify drop elaboration that inactive enum variants might be uninitialized, some drops get marked as ["open" that were previously "static"](e0e5d82e16/src/librustc_mir/transform/elaborate_drops.rs (L191)). Unlike in #69715, this isn't strictly better: An "open" drop expands to more MIR than a simple call to the drop shim. However, because drop elaboration considers each field of an "open" drop separately, it can sometimes eliminate unnecessary drops of moved-from or unit-like enum variants. This is the case for `Option::unwrap`, which is reflected in the `mir-opt` test.
cc @eddyb
r? @oli-obk
This causes the components of FQN's to behave similarly to other links
in the contents of rustdoc-styled pages.
I (and I hope others at least in part) have found the prior design to be
somewhat confusing, as it is not clear (upon hovering) that the various
parts of the FQN are actually links that the user can navigate to.
In short, this patch makes links in the FQN have an underline when the
user hovers over them, more clearly indicating that they can be used for
navigation.
Signed-off-by: Kristofer Rye <kristofer.rye@gmail.com>
The thread that recovers the unique access to Arc inner value (e.g., drop
when ref-count strong reaches zero, successful try_unwrap), ensures that
other operations on Arc inner value happened before by synchronizing
with release operations performed when decrementing the reference counter.
When try_unwrap succeeds, the current thread recovers the unique access
to Arc inner value, so release is unnecessary.
ship rust analyzer
This successfully builds rust-analyzer as a part of rust repo. I haven't yet added required changes to dist.rs -- seems like I just have to copy-paste quite a bit of code I don't really understand :-)
Bump mingw-check CI image from Ubuntu 16.04 to 18.04.
I chose 18.04 because we use it for other builders, and it's enough to get a version of MinGW that can build `libssh2-sys`.
This is a prereq for #73902, where `libssh2-sys` shows up as an indirect dependency of `x.py check src/tools/semverver` (through `src/tools/cargo`, which we don't currently `x.py check` because it's not in-tree). See also https://github.com/rust-lang/rust/pull/73902#issuecomment-652414502.
r? @Mark-Simulacrum cc @mati865
[mir-opt] Fix mis-optimization and other issues with the SimplifyArmIdentity pass
This does not yet attempt re-enabling the pass, but it does resolve a number of issues with the pass.
r? @oli-obk
I believe this closes#73223.
Use &raw in A|Rc::as_ptr
This PR uses `&raw` for offsetting `*mut [A]RcInner<T> -> *mut T`.
Additionally, this updates the implementation of `Weak::as_ptr` to support unsized `T`, though it does not yet relax the bounds of `Weak::as_ptr`/`into_raw`/`from_raw` to accept unsized `T`.
Add `format_args_capture` feature
This is the initial implementation PR for [RFC 2795](https://github.com/rust-lang/rfcs/pull/2795).
Note that, as dicussed in the tracking issue (#67984), the feature gate has been called `format_args_capture`.
Next up I guess I need to add documentation for this feature. I've not written any docs before for rustc / std so I would appreciate suggestions on where I should add docs.
Fallback to xml.etree.ElementTree
The xml.etree.cElementTree has been deprecated since Python 3.3
and removed in Python 3.9 https://bugs.python.org/issue36543.
