Fix hashing for windows paths containing a CurDir component
* the logic only checked for / but not for \
* verbatim paths shouldn't skip items at all since they don't get normalized
* the extra branches get optimized out on unix since is_sep_byte is a trivial comparison and is_verbatim is always-false
* tests lacked windows coverage for these cases
That lead to equal paths not having equal hashes and to unnecessary collisions.
A fix applied to std::Path::hash triggers a miscompilation/assert in LLVM in this test on wasm32.
The miscompilation appears to pre-existing. Reverting some previous changes done std::Path also trigger it
and slight modifications such as changing the test path from "a" to "ccccccccccc" also make it pass, indicating
it's very flaky.
Since the fix is for a higher-tier platform than wasm it takes precedence.
The only difference between the default and rustc_interface set version
is that the default accesses the source map from SESSION_GLOBALS while
the rustc_interface version accesses the source map from the global
TyCtxt. SESSION_GLOBALS is always set while running the compiler while
the global TyCtxt is not always set. If the global TyCtxt is set, it's
source map is identical to the one in SESSION_GLOBALS
This ensures that it is called even when run_in_thread_pool_with_globals
is avoided and reduces code duplication between the parallel and
non-parallel version of run_in_thread_pool_with_globals
tidy: Extend error code check
We discovered in https://github.com/rust-lang/rust/pull/93845 that the error code tidy check didn't check everything: if you remove an error code from the listing even if it has an explanation, then it should error.
It also allowed me to put back `E0192` in that listing as well.
r? ```@Mark-Simulacrum```
linkchecker: fix panic on directory symlinks
In Debian and Ubuntu, there are some patches that change the rustc/fonts
directory to a symlink to the system fonts. This triggers a latent bug
in linkchecker, as the DirEntry filetype isn't a dir but later on the
file itself, when opened, is one, triggering an unreachable!() clause.
This patch fixes the situation by using std::fs::metadata, which goes
through symlinks.
I'd have added a test case but `tidy` doesn't seem to like symlinks, and
moreover I'm not sure how Git deals with symlinks on Windows.
Signed-off-by: Simon Chopin <simon.chopin@canonical.com>
Add some known GAT bugs as tests
In the spirit of rust-lang/compiler-team#476
These tests are marked as "check-fail", but also commented with "this should pass". This many of the open GAT issues that are accepted bugs.
r? ``@nikomatsakis``
fix ICE when parsing lifetime as function argument
I don't really like this, but we basically need to emit an error instead of just delaying an bug, because there are too many places in the AST that aren't covered by my previous PRs...
cc: https://github.com/rust-lang/rust/issues/93282#issuecomment-1028052945
Implement `tainted_by_errors` in MIR borrowck, use it to skip CTFE
Putting this up for initial review. The issue that I found is when we're evaluating a const, we're doing borrowck, but doing nothing with the fact that borrowck fails.
This implements a `tainted_by_errors` field for MIR borrowck like we have in infcx, so we can use that information to return an `Err` during const eval if our const fails to borrowck.
This PR needs some cleaning up. I should probably just use `Result` in more places, instead of `.expect`ing in the places I am, but I just wanted it to compile so I could see if it worked!
Fixes#93646
r? `@oli-obk`
feel free to reassign
Use const generics in SipHasher128's short_write
This was proposed by `@michaelwoerister` [here](https://github.com/rust-lang/rust/pull/93615#discussion_r799485554).
A few comments:
1) I tried to pass `&[u8; LEN]` instead of `[u8; LEN]`. Locally, it resulted in small icount regressions (about 0.5 %). When passing by value, there were no regressions (and no improvements).
2) I wonder if we should use `to_ne_bytes()` in `SipHasher128` to keep it generic and only use `to_le_bytes()` in `StableHasher`. However, currently `SipHasher128` is only used in `StableHasher` and the `short_write` method was private, so I couldn't use it directly from `StableHasher`. Using `to_le()` in the `StableHasher` was breaking this abstraction boundary before slightly.
```rust
debug_assert!(LEN <= 8);
```
This could be done at compile time, but actually I think that now we can remove this assert altogether.
r? `@the8472`
