Codegen ZSTs without an allocation
This makes sure that &[] is equivalent to unsafe code (from_raw_parts(dangling, 0)). No new stable guarantee is intended about whether or not we do this, this is just an optimization.
This regressed in #67000 (no comments I can see about that regression in the PR, though it did change the test modified here). We had previously performed this optimization since #63635.
Remove libc from rust_get_test_int uses
`rust_test_helpers.c` has a few unfortunate signatures which have made some of our UI tests _technically_ need the `libc` crate. This is my attempt to evict the need of `libc` for `rust_get_test_int`.
I've deleted `tests/ui/abi/foreign/foreign-no-abi.rs` because the test was originally written to check that `native mod` will compile without an ABI specifier. `native mod` was removed years before 1.0 and the test hasn't checked for anything for a long time.
interpret: pass MemoryKind to adjust_alloc_base_pointer
Another puzzle piece for https://github.com/rust-lang/miri/pull/3475.
The 2nd commit renames base_pointer -> root_pointer; that's how Tree Borrows already calls them and I think the term is more clear than "base pointer". In particular, this distinguishes it from "base address", since a root pointer can point anywhere into an allocation, not just its base address.
https://github.com/rust-lang/rust/pull/124018 has been rolled up already so I couldn't add it there any more.
r? ```@oli-obk```
Document overrides of `clone_from()` in core/std
As mentioned in https://github.com/rust-lang/rust/pull/96979#discussion_r1379502413
Specifically, when an override doesn't just forward to an inner type, document the behavior and that it's preferred over simply assigning a clone of source. Also, change instances where the second parameter is "other" to "source".
I reused some of the wording over and over for similar impls, but I'm not sure that the wording is actually *good*. Would appreciate feedback about that.
Also, now some of these seem to provide pretty specific guarantees about behavior (e.g. will reuse the exact same allocation iff the len is the same), but I was basing it off of the docs for [`Box::clone_from`](https://doc.rust-lang.org/1.75.0/std/boxed/struct.Box.html#method.clone_from-1) - I'm not sure if providing those strong guarantees is actually good or not.
meta: notify #t-rustdoc Zulip stream on backport nominations
In July '23, it was decided to handle rustdoc-specific backport nominations in t-rustdoc meetings going forward ([Zulip announcement](https://rust-lang.zulipchat.com/#narrow/stream/266220-t-rustdoc/topic/T-rustdoc.20backports/near/374828518)). However, t-rustdoc meetings are far too infrequent for them to address nominations on time (contrary to the weekly t-compiler meetings).
Hence GuillaumeGomez and I came to the conclusion that {beta,stable}-nominated rustdoc PRs should be dealt with on a case by case basis, e.g. on Zulip.
This PR attempts to partially automate this process. ~~Sadly, `triagebot` is not quite as flexible has I've hoped. Blocked on `triagebot` improvements (see the `FIXME`s in this PR).~~ (Fixed in rust-lang/triagebot#1791).
r? GuillaumeGomez
This comment was historically inside a block guarded by
`if let Some(otherwise_block) = otherwise`.
When #120978 made the otherwise block non-optional, it also flattened that
region of code. Doing so left this comment awkwardly stranded above an
unrelated line of code, without its original context.
We can restore that context by moving it above the declaration of `otherwise`.
Improve the experience of running Docker locally
When running locally, the absence of the `GITHUB_STEP_SUMMARY` environment variable will lead to the following error:
```
::endgroup::
./src/ci/docker/run.sh: line 349: : No such file or directory
```
I've also changed the output artifacts directory to `obj/$image_name`, allowing me to easily run all images locally. We always encounter various strange issues when modifying the test cases in the `codegen` directory.
r? Kobzol cc `@saethlin`
Add `cargo dev setup toolchain`
Adds a `cargo dev setup toolchain` subcommand that creates a rustup toolchain with symlinks to the local `cargo-clippy` and `clippy-driver`. Allows you to then do `cargo +clippy clippy` in other projects to run the locally built Clippy
Sometimes more convenient when you're testing changes on a separate project than `cd`ing back & forth to use `cargo dev lint [project]`
changelog: none
Delay span bug when `Self` kw resolves to `DefKind::{Mod,Trait}`
Catch the case where `kw::Self` is recovered in the parser and causes us to subsequently resolve `&self`'s implicit type to something that's not a type.
This check could be made more accurate, though I'm not sure how hard we have to try here.
Fixes#123988
refactor clippy in bootstrap
Previously, using clippy in bootstrap was not very useful as explained in #122825. In short, regardless of the given path clippy would always check the entire compiler and std tree. This makes it impossible to run clippy on different paths with different set of rules. This PR fixes that by allowing developers to run clippy with specific rules on specific paths (e.g., we can run `x clippy compiler -Aclippy::all -Dclippy::correctness` and `x clippy library/std -Dclippy::all` and none of them will affect each other).
Resolves#122825
