Rollup of 3 pull requests#152239
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rust-bors[bot] merged 6 commits intorust-lang:mainfrom Feb 6, 2026
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…e-consts, r=BoxyUwU
MGCA: require #[type_const] on free consts too
When investigating another issue, I discovered that following ICEs (the `const_of_item` query doesn't support non-type_const-marked constants and does a `span_delayed_bug`):
```rust
#![feature(min_generic_const_args)]
#![allow(incomplete_features)]
const N: usize = 4;
fn main() {
let x = [(); N];
}
```
My initial thought of "only require `#[type_const]` on places that stable doesn't currently accept" ran into the issue of this compiling on stable today:
```rust
trait Trait {
const N: usize;
}
impl<const PARAM: usize> Trait for [(); PARAM] {
const N: usize = PARAM;
}
fn main() {
let x = [(); <[(); 4] as Trait>::N];
}
```
Figuring out which specific cases are not currently accepted by stable is quite hairy.
Upon discussion with @BoxyUwU, she suggested that *all* consts, including free consts, should require `#[type_const]` to be able to be referred to. This is what this PR does.
---
~~The change to `tests/ui/const-generics/generic_const_exprs/non-local-const.rs` is unfortunate, reverting the fix in rust-lang#143106 no longer fails the test. Any suggestions to test it more appropriately would be most welcome!~~
edit: never mind, figured out how compiletests work :) - verified that the new test setup correctly ICEs when that PR's fix is reverted.
r? @BoxyUwU
…=BoxyUwU mGCA: Support directly represented negated literals fixes rust-lang#152123 PatExprKind already awkwardly tacks on a `negated: bool` for the same purpose: https://github.com/rust-lang/rust/blob/8bccf1224deab49b54694c9090e577bfe90a94e6/compiler/rustc_hir/src/hir.rs#L1954-L1959 perhaps one day we should indeed do that FIXME... r? @BoxyUwU
Convert to inline diagnostics in `rustc_passes` For rust-lang#151366 r? @jdonszelmann
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@bors r+ rollup=never p=5 |
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📌 Perf builds for each rolled up PR:
previous master: bce89b6a56 In the case of a perf regression, run the following command for each PR you suspect might be the cause: |
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What is this?This is an experimental post-merge analysis report that shows differences in test outcomes between the merged PR and its parent PR.Comparing bce89b6 (parent) -> efc9e1b (this PR) Test differencesShow 246 test diffsStage 0
Stage 1
Stage 2
(and 124 additional test diffs) Additionally, 22 doctest diffs were found. These are ignored, as they are noisy. Job group index
Test dashboardRun cargo run --manifest-path src/ci/citool/Cargo.toml -- \
test-dashboard efc9e1b50cbf2cede7ebe25f0a1fc64fd8b3e942 --output-dir test-dashboardAnd then open Job duration changes
How to interpret the job duration changes?Job durations can vary a lot, based on the actual runner instance |
This was referenced Feb 6, 2026
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Finished benchmarking commit (efc9e1b): comparison URL. Overall result: ❌✅ regressions and improvements - please read the text belowOur benchmarks found a performance regression caused by this PR. Next Steps:
@rustbot label: +perf-regression Instruction countOur most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.
Max RSS (memory usage)Results (primary -0.9%, secondary -2.1%)A less reliable metric. May be of interest, but not used to determine the overall result above.
CyclesResults (secondary -4.7%)A less reliable metric. May be of interest, but not used to determine the overall result above.
Binary sizeThis benchmark run did not return any relevant results for this metric. Bootstrap: 474.508s -> 474.536s (0.01%) |
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Successful merges:
rustc_passes#152189 (Convert to inline diagnostics inrustc_passes)r? @ghost
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