Stabilize abi_sysv64
Closes#36167, stabilizing the use of the "sysv64" ABI on x64 platforms where it is not the default ABI.
FCP on this is complete in the tracking issue.
rustc_mir: promote references of statics from other statics.
Fixes#46522 by also allowing `STATIC_REF` in MIR const-qualification, not just AST rvalue promotion.
Display `\t` in diagnostics code as four spaces
Follow up to #44386 using the unicode variable width machinery from #45711 to replace tabs in the source code when displaying a diagnostic error with four spaces (instead of only one), while properly accounting for this when calculating underlines.
Partly addresses #44618.
MIR borrowck: implement union-and-array-compatible semantics
Fixes#44831.
Fixes#44834.
Fixes#45537.
Fixes#45696 (by implementing DerefPure semantics, which is what we want going forward).
r? @nikomatsakis
Give compile_error macro examples
I cannot get Rust to build at all with it complaining about GCC not being a valid C compiler or something, so letting TravisCI be my tester...
Fixes#46171
Update old link
The CONTRIBUTING.md page currently links to an old wiki page in rust-lang/rust-wiki-backup. There is a more up-to-date page in-tree so I changed the link to point there so new contributors can find it more easily.
Mention the name of ? in Result's docs
Fixes#42725
or at least, this is the best we can really do. #35946 is tracking
better errors already, so that should cover the other part of it.
coherence: fix is_knowable logic
A trait-ref that passes the orphan-check rules can still be implemented in a crate downstream from our crate (for example, `LocalType for LocalTrait<_>` might be matched by a `LocalType for LocalTrait<TypeFromDownstreamCrate>`), and this should be known by the `is_knowable` logic.
Trait selection had a hackfix for this, but it's an hacky fix that does not handle all cases. This patch removes it.
fixes#43355.
r? @nikomatsakis
Needs a crater run
rustc_mir: don't move temporaries that are still used later.
This should unbreak using the MIR borrow-checker on `libcore` (assuming #46268 is merged).
Remove librustdoc dependency on log
This change should have been included in PR #46386.
Since librustdoc doesn't explicitly depend on internal crates
(such as librustc_driver) through its Cargo.toml, it ends up using the
sysroot to resolve them. By removing the dependency on 'log',
we ensure that the syroot is used to resolve `log` as well. This ensures
that only one version of log is in use, so that `env_logger::init()`
enables all uses of `log!` macros.
