rust/compiler/rustc_span/src, branch try

Introduce `Symbol::with_interner`.

2025-07-22T05:59:24+00:00

It lets you get the contents of multiple symbols with a single TLS lookup and interner lock, instead of one per symbol.

Rollup merge of #144212 - bjorn3:remove_unique_lang_item, r=oli-obk

2025-07-21T16:54:30+00:00

Remove the ptr_unique lang item Miri no longer uses it since https://github.com/rust-lang/miri/pull/4307.

Remove the ptr_unique lang item

2025-07-20T09:50:58+00:00

Miri no longer uses it.

Mitigate `#[align]` name resolution ambiguity regression with a rename

2025-07-18T17:42:30+00:00

From `#[align]` -> `#[rustc_align]`. Attributes starting with `rustc` are always perma-unstable and feature-gated by `feature(rustc_attrs)`. See regression RUST-143834. For the underlying problem where even introducing new feature-gated unstable built-in attributes can break user code such as ```rs macro_rules! align { () => { /* .. */ }; } pub(crate) use align; // `use` here becomes ambiguous ``` refer to RUST-134963. Since the `#[align]` attribute is still feature-gated by `feature(fn_align)`, we can rename it as a mitigation. Note that `#[rustc_align]` will obviously mean that current unstable user code using `feature(fn_aling)` will need additionally `feature(rustc_attrs)`, but this is a short-term mitigation to buy time, and is expected to be changed to a better name with less collision potential. See where mitigation options were considered.

Rollup merge of #143925 - oli-obk:slice-const-partialeq, r=fee1-dead

2025-07-18T12:49:19+00:00

Make slice comparisons const This needed a fix for `derive_const`, too, as it wasn't usable in libcore anymore as trait impls need const stability attributes. I think we can't use the same system as normal trait impls while `const_trait_impl` is still unstable. r? ```@fee1-dead``` cc rust-lang/rust#143800

Make `derive_const` usable within libcore again

2025-07-17T15:42:54+00:00

Also make it *only* usable on nightly

Auto merge of #142903 - cjgillot:local-def-path-hash, r=compiler-errors

2025-07-17T08:36:42+00:00

Only inherit local hash for paths `DefPathHash`, as the counterpart of `DefId` that is stable across compiler invocations, is comprised of 2 parts. The first one is the `StableCrateId`, stable form of `CrateNum`. The second is 64 complementary bits to identify the crate-local definition. The current implementation always hashes the full 128 bits when (1) trying to create a new child `DefPathHash` or (2) hashing a `CrateNum` or a `LocalDefId`. But we only need half that information: `LocalDefId` means that the `StableCrateId` is always the current crate's ; `CrateNum` means that we do not care about the local part. As stable hashing is very hot in the query system, in particular hashing definitions, this is a big deal. We still want the local part to change when the `StableCrateId` changes, to make incr-compilation errors less painful, ie. increase the likelihood that if will magically disappear by changing some code. This PR sprinkles some `#[inline]` attributes on small functions that appeared in profiles.

Auto merge of #144044 - fmease:rollup-kg413pt, r=fmease

2025-07-17T05:24:30+00:00

Rollup of 15 pull requests Successful merges: - rust-lang/rust#142304 (tests: Add `RUST_BACKTRACE` and `-Cpanic` revisions to `panic-main.rs` test) - rust-lang/rust#143388 (Various refactors to the LTO handling code) - rust-lang/rust#143409 (Enable xgot feature for mips64 musl targets) - rust-lang/rust#143592 (UWP: link ntdll functions using raw-dylib) - rust-lang/rust#143595 (add `const_make_global`; err for `const_allocate` ptrs if didn't call) - rust-lang/rust#143678 (Added error for invalid char cast) - rust-lang/rust#143820 (Fixed a core crate compilation failure when enabling the `optimize_for_size` feature on some targets) - rust-lang/rust#143829 (Trim `BorrowedCursor` API) - rust-lang/rust#143851 (ci cleanup: rustdoc-gui-test now installs browser-ui-test) - rust-lang/rust#143856 (Linting public reexport of private dependencies) - rust-lang/rust#143895 (Dont collect assoc ty item bounds from trait where clause for host effect predicates) - rust-lang/rust#143922 (Improve path segment joining) - rust-lang/rust#143964 (Fix handling of SCRIPT_ARG in docker images) - rust-lang/rust#144002 (Update poison.rs) - rust-lang/rust#144016 (trait_sel: `MetaSized` always holds temporarily) r? `@ghost` `@rustbot` modify labels: rollup

add `const_make_global`; err for `const_allocate` ptrs if didn't call

2025-07-15T16:32:12+00:00

Co-Authored-By: Ralf Jung Co-Authored-By: Oli Scherer

Implement other logics

2025-07-15T13:48:30+00:00