Rollup of 21 pull requests - #154255
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In CI, the receiver thread can be descheduled for a surprisingly long time, so there's no guarantee that a timeout actually occurs.
Instead of relying on the linker to find the 'environ' symbol, use dlsym. Fixes rust-lang#153451 Sponsored by: ConnectWise
Add a HasAttrs<'tcx, Tcx> trait to rustc_hir that allows find_attr! to accept DefId, LocalDefId, OwnerId, and HirId directly, instead of requiring callers to manually fetch the attribute slice first. The trait is defined in rustc_hir with a generic Tcx parameter to avoid a dependency cycle (rustc_hir cannot depend on rustc_middle). The four concrete impls for TyCtxt are in rustc_middle.
…d documentation + tests
This improves startup performance by 16%, shown by an optimized hello-world program. glibc's `pthread_getattr_np` performs expensive syscalls when reading `/proc/self/maps`. That is all wasted with `panic = immediate-abort` active because `init()` immediately discards the return value from `install_main_guard()`. A similar improvement can be seen in environments that don't have `/proc`. This change is safe because the immediately succeeding comment says that we rely on Linux's "own stack-guard mechanism".
Avoid an ICE for:
struct A;
impl A<B> {}
The compiler no longer panics and can proceed to emit existing diagnostics.
Adds `tests/ui/missing/undeclared-generic-parameter.rs`.
Signed-off-by: Usman Akinyemi <usmanakinyemi202@gmail.com>
Now that the tracking issue has been opened, point to it.
When a function's documentation has to explain the meaning of nested results and options, then it is often a good candidate for using a custom result enum instead. This commit also renames `DepNodeColorMap::try_mark` to `try_set_color`, to make it more distinct from the similarly-named `DepGraph::try_mark_green`. The difference is that `try_mark_green` is a higher-level operation that tries to determine whether a node _can_ be marked green, whereas `try_set_color` is a lower-level operation that actually records a color for the node.
This method is only used to initialize the always-red node, which can be done with `try_set_color` instead.
Both zstd and zlib are *known* compression algorithms, they just may not be supported by the backend. We shouldn't mislead users into e.g. thinking they made a typo.
privacy: Fix type privacy holes in RPITITs A subset of rust-lang#146470. Private types in RPITITs now report hard errors. Private types in bounds of associated types still only report the `private_bounds` lint due to unacceptable amount of breakage (rust-lang#146470 (comment)). Closes rust-lang#144139
…d, r=Mark-Simulacrum Optimize BTreeMap::append() using CursorMut Since [`BTreeMap::merge`](rust-lang#152418 (comment)) uses `CursorMut` to avoid reconstructing the map from scratch and instead inserting other `BTreeMap` at the right places or overwriting the value in self `BTreeMap` on conflict, we might as well do the same for `BTreeMap::append`. This also means that some of the code in `append.rs` can be removed; `bulk_push()` however is used by `bulk_build_from_sorted_iterator()`, which is used by the `From`/`FromIterator` trait impl on `BTreeMap`. Feels like we should rename the file or place the `bulk_push()` in an existing file. The same additional optimization consideration that `BTreeMap::merge` has is also applied to `BTreeMap::append`. r? @Mark-Simulacrum since Mark has seen the `BTreeMap::merge` code already (only diff is the `Ordering::Equal` case and now one of the test assertions on a panic case has the correct value now).
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@bors r+ rollup=never p=5 |
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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 bbe8536 (parent) -> 13e2aba (this PR) Test differencesShow 984 test diffsStage 1
Stage 2
Additionally, 946 doctest diffs were found. These are ignored, as they are noisy. Job group index
Test dashboardRun And 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 Mar 23, 2026
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Finished benchmarking commit (13e2aba): comparison URL. Overall result: ✅ improvements - no action needed@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 -4.8%, secondary 0.9%)A less reliable metric. May be of interest, but not used to determine the overall result above.
CyclesResults (secondary -0.2%)A less reliable metric. May be of interest, but not used to determine the overall result above.
Binary sizeResults (primary -0.0%, secondary -0.1%)A less reliable metric. May be of interest, but not used to determine the overall result above.
Bootstrap: 488.646s -> 482.731s (-1.21%) |
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Successful merges:
got_timeoutassert from two channel tests #153534 (Remove a flakygot_timeoutassert from two channel tests)target.abitotarget.cfg_abiand enum-ify llvm_abiname #153857 (Renametarget.abitotarget.cfg_abiand enum-ify llvm_abiname)freeze_*methods toOpenOptionsExt2#153491 (Movefreeze_*methods toOpenOptionsExt2)sys::pal::ostosys::paths#153623 (std: movesys::pal::ostosys::paths)BinaryHeap::as_mut_slice#154011 (implementBinaryHeap::as_mut_slice)incomplete_featuresin most UI tests #154174 (allowincomplete_featuresin most UI tests)DepNodeColorMapcolor marking #154201 (Use enums to clarifyDepNodeColorMapcolor marking )r? @ghost
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