Try to say that memory outside the AM is always exposed
cc ``@Gankra`` ``@thomcc``
I want to confidently tell people that they can use `from_exposed_addr` to get a pointer for doing MMIO and/or other hardware interactions done with volatile reads/writes at particular addresses outside the Rust AM. Currently, the docs indicate that would be UB.
With this change, now the docs indicate that this is intended to be a valid use of `from_exposed_addr`.
r? ``@RalfJung``
Even nicer errors from assert_unsafe_precondition
For example, now running `cargo test` with this patch I get things like:
```
$ cargo +stage1 test
Finished test [unoptimized + debuginfo] target(s) in 0.01s
Running unittests src/lib.rs (target/debug/deps/malloc_buf-9d105ddf86862995)
running 5 tests
thread 'tests::test_null_buf' panicked at 'unsafe precondition violated: is_aligned_and_not_null(data) &&
crate::mem::size_of::<T>().saturating_mul(len) <= isize::MAX as usize', /home/ben/rust/library/core/src/slice/raw.rs:93:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread panicked while panicking. aborting.
error: test failed, to rerun pass `--lib`
Caused by:
process didn't exit successfully: `/tmp/malloc_buf-1.0.0/target/debug/deps/malloc_buf-9d105ddf86862995` (signal: 6, SIGABRT: process abort signal)
```
This is still not perfect, but these are better for another PR:
* `stringify!` is trying to do clever pretty-printing on the `expr` inside `assert_unsafe_precondition` and can even add a newline.
* It would be nice to print a bit more information about where the problem is. Perhaps this is `cfg_attr(debug_assertions, track_caller)`, or perhaps it the function name added to `Location`.
cc ``@RalfJung`` this is what I was thinking of for https://github.com/rust-lang/rust/pull/102732#discussion_r989068907
Remove `commit_if_ok` probe from NLL type relation
It was not really necessary to add the `commit_if_ok` in #100092 -- I added it to protect us against weird inference error messages due to recursive RPIT calls, but we are always on the error path when this happens anyways, and I can't come up with an example that makes this manifest.
Fixes#103599
r? `@oli-obk` since you reviewed #100092, feel free to re-roll.
🅱️📢 beta-nominating this since it's on beta (which forks in ~a week~ two days 😨) -- worst case we could revert the original PR on beta and land this on nightly, to give it some extra soak time...
Add Target Tier Policy notification.
This adds a notification posted to PRs when they add/modify a target spec.
This was hard-coded in highfive. I forgot to include this in https://github.com/rust-lang/rust/pull/103492.
ptr::eq: clarify that comparing dyn Trait is fragile
Also remove the dyn trait example from `ptr::eq` since those tests are not actually guaranteed to pass due to how unstable vtable comparison is.
Cc ``@rust-lang/libs-api``
Cc discussion following https://github.com/rust-lang/rust/pull/80505
Update cargo
5 commits in 071eeaf210708219a5a1b2c4728ca2f97df7f2ae..9210810d1fd7b51ae0439a0a363cc50e36963455 2022-10-22 01:17:55 +0000 to 2022-10-25 22:31:50 +0000
- Fix 410 gone response handling (rust-lang/cargo#11286)
- Fix inequality in "stale mtime" log messages (rust-lang/cargo#11281)
- doc(cargo-tree): mention it considering feature unification (rust-lang/cargo#11282)
- Improve the error message if `publish` is `false` or empty list (rust-lang/cargo#11280)
- Add test for deleted index entry (rust-lang/cargo#11278)
rustdoc: don't mark Box<T> as Iterator, Read, etc
Because Box<T> has pass-through implementations, rustdoc was giving it the "Notable Traits" treatment for Iterator, Read, Write, and Future, even when the type of T was unspecified.
Pin had the same problem, but just for Future.
Fixes#100320
test on windows-gnu target
The windows-gnu target for an open-source windows toolchain is slightly different in some low-level aspects of the standard library, such as TLS handling. So let's separately ensure that this works. (Also tests a 64bit windows target on a windows host, which we didn't have so far.)
