Rollup of 14 pull requests by JonathanBrouwer · Pull Request #164355 · rust-lang/rust

JonathanBrouwer · 2026-10-15T12:13:39Z

Successful merges:

Test panics and wasm32-wasip3 in CI, not wasip1 #163132 (Test panics and wasm32-wasip3 in CI, not wasip1)
Abby: use a smallvec for And/Or constraints #164314 (Abby: use a smallvec for And/Or constraints)
Mangle personality symbol #148413 (Mangle personality symbol)
Add aarch64-unknown-qtee as a tier 3 target #163688 (Add aarch64-unknown-qtee as a tier 3 target)
Fix ICE when move expressions reference out-of-scope local bindings #164076 (Fix ICE when move expressions reference out-of-scope local bindings)
[coff] Symbol renaming stored the original name, not the undecorated name #164327 ([coff] Symbol renaming stored the original name, not the undecorated name)
Improve diagnostics for non-well-formed associated items #162432 (Improve diagnostics for non-well-formed associated items)
cg_llvm: Use a callback to enforce scoped lifetimes in ModuleLlvm #164138 (cg_llvm: Use a callback to enforce scoped lifetimes in ModuleLlvm )
incomplete -> unstable for delegation feature #164210 (incomplete -> unstable for delegation feature)
Point at assoc item for trait that needs to be implemented #164225 (Point at assoc item for trait that needs to be implemented)
Output remapped paths in rustdoc JSON with the documentation scope #164278 (Output remapped paths in rustdoc JSON with the documentation scope)
format abby dsl errors better #164308 (format abby dsl errors better)
expand and document tool attribute shadowing test #164335 (expand and document tool attribute shadowing test)
Use regular type parsing for argument-position const parameters #164342 (Use regular type parsing for argument-position const parameters)

Previously, std-internal symbols (like `__rust_alloc` or `rust_panic`) were changed to now be mangled via a v0 scheme with the compiler version hash (`_RNvCs4CIB29Id3dw_7___rustc10rust_panic`) to make it possible to have multiple staticlibs (as long as they have different version hashes) in the same program without symbol conflicts. But the personality function remained unmangled, because LLVM hardcodes that name. I made a change in LLVM that makes LLVM now check the suffix instead of an exact match, so we can mangle the personality function with this scheme. This removes the last completely unmangled symbol from Rust staticlibs! (though the mangling is still quite weak, so it's still not as nice as it would ideally be). Before, on a trivial staticlib: ``` readelf -s liblib.a | rg GLOBAL | rg -v " UND | HIDDEN " | rg -v ' _ZN' 8: 0000000000000000 5 FUNC GLOBAL DEFAULT 3 _RNvCseCSg29WUqSe_7___rustc12___rust_alloc 10: 0000000000000000 5 FUNC GLOBAL DEFAULT 5 _RNvCseCSg29WUqSe_7___rustc14___rust_dealloc 12: 0000000000000000 5 FUNC GLOBAL DEFAULT 7 _RNvCseCSg29WUqSe_7___rustc14___rust_realloc 14: 0000000000000000 5 FUNC GLOBAL DEFAULT 9 _RNvCseCSg29WUqSe_7___rustc19___rust_alloc_zeroed 16: 0000000000000000 3 FUNC GLOBAL DEFAULT 11 _RNvCseCSg29WUqSe_7___rustc42___rust_alloc_error_handler_should_panic_v2 17: 0000000000000000 1 FUNC GLOBAL DEFAULT 12 _RNvCseCSg29WUqSe_7___rustc35___rust_no_alloc_shim_is_unstable_v2 3383: 0000000000000000 111 FUNC GLOBAL DEFAULT 5 _RNvCseCSg29WUqSe_7___rustc10rust_panic 3387: 0000000000000000 93 FUNC GLOBAL DEFAULT 7 _RNvCseCSg29WUqSe_7___rustc11___rdl_alloc 3390: 0000000000000000 10 FUNC GLOBAL DEFAULT 9 _RNvCseCSg29WUqSe_7___rustc12___rust_abort 3391: 0000000000000000 6 FUNC GLOBAL DEFAULT 11 _RNvCseCSg29WUqSe_7___rustc13___rdl_dealloc 3393: 0000000000000000 167 FUNC GLOBAL DEFAULT 13 _RNvCseCSg29WUqSe_7___rustc13___rdl_realloc 3396: 0000000000000000 203 FUNC GLOBAL DEFAULT 15 _RNvCseCSg29WUqSe_7___rustc17___rust_drop_panic 3399: 0000000000000000 29 FUNC GLOBAL DEFAULT 18 _RNvCseCSg29WUqSe_7___rustc17rust_begin_unwind 3401: 0000000000000000 140 FUNC GLOBAL DEFAULT 20 _RNvCseCSg29WUqSe_7___rustc18___rdl_alloc_zeroed 3404: 0000000000000000 203 FUNC GLOBAL DEFAULT 22 _RNvCseCSg29WUqSe_7___rustc24___rust_foreign_exception 3405: 0000000000000000 19 FUNC GLOBAL DEFAULT 25 _RNvCseCSg29WUqSe_7___rustc26___rust_alloc_error_handler 4410: 0000000000000000 1471 FUNC GLOBAL DEFAULT 2752 rust_eh_personality 25: 0000000000000000 161 FUNC GLOBAL DEFAULT 5 _RNvCseCSg29WUqSe_7___rustc18___rust_start_panic 32: 0000000000000000 82 FUNC GLOBAL DEFAULT 8 _RNvCseCSg29WUqSe_7___rustc20___rust_panic_cleanup 249: 0000000000000000 182 FUNC GLOBAL DEFAULT 5 _RNvCseCSg29WUqSe_7___rustc25___rdl_alloc_error_handler 3: 0000000000000000 57 FUNC GLOBAL DEFAULT 3 _RNvCseCSg29WUqSe_7___rustc17___rust_probestack ``` After: ``` 8: 0000000000000000 5 FUNC GLOBAL DEFAULT 3 _RNvCs4CIB29Id3dw_7___rustc12___rust_alloc 10: 0000000000000000 5 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc14___rust_dealloc 12: 0000000000000000 5 FUNC GLOBAL DEFAULT 7 _RNvCs4CIB29Id3dw_7___rustc14___rust_realloc 14: 0000000000000000 5 FUNC GLOBAL DEFAULT 9 _RNvCs4CIB29Id3dw_7___rustc19___rust_alloc_zeroed 16: 0000000000000000 3 FUNC GLOBAL DEFAULT 11 _RNvCs4CIB29Id3dw_7___rustc42___rust_alloc_error_handler_should_panic_v2 17: 0000000000000000 1 FUNC GLOBAL DEFAULT 12 _RNvCs4CIB29Id3dw_7___rustc35___rust_no_alloc_shim_is_unstable_v2 422: 0000000000000000 19 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc26___rust_alloc_error_handler 429: 0000000000000000 308 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc19rust_eh_personality 349: 0000000000000000 10 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc12___rust_abort 164: 0000000000000000 93 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc11___rdl_alloc 167: 0000000000000000 11 FUNC GLOBAL DEFAULT 7 _RNvCs4CIB29Id3dw_7___rustc13___rdl_dealloc 169: 0000000000000000 167 FUNC GLOBAL DEFAULT 9 _RNvCs4CIB29Id3dw_7___rustc13___rdl_realloc 172: 0000000000000000 140 FUNC GLOBAL DEFAULT 11 _RNvCs4CIB29Id3dw_7___rustc18___rdl_alloc_zeroed 688: 0000000000000000 106 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc10rust_panic 693: 0000000000000000 207 FUNC GLOBAL DEFAULT 7 _RNvCs4CIB29Id3dw_7___rustc17___rust_drop_panic 696: 0000000000000000 29 FUNC GLOBAL DEFAULT 10 _RNvCs4CIB29Id3dw_7___rustc17rust_begin_unwind 698: 0000000000000000 207 FUNC GLOBAL DEFAULT 12 _RNvCs4CIB29Id3dw_7___rustc24___rust_foreign_exception 26: 0000000000000000 161 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc18___rust_start_panic 33: 0000000000000000 82 FUNC GLOBAL DEFAULT 8 _RNvCs4CIB29Id3dw_7___rustc20___rust_panic_cleanup 88: 0000000000000000 182 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc25___rdl_alloc_error_handler 3: 0000000000000000 57 FUNC GLOBAL DEFAULT 3 _RNvCs4CIB29Id3dw_7___rustc17___rust_probestack ``` Co-Authored-By: bjorn3 <17426603+bjorn3@users.noreply.github.com>

Remove the `where Self: Sized` suggestion and the Sized-specific label suppression so an explicit `Self: Sized` clause is reported like any other `Self: Trait` bound, and only suggest relaxing the implicit `Sized` restriction when the failing obligation is that implicit restriction rather than an explicit where clause of the item. Also rename the regression tests and add a case for an implicit `Sized` failure on an associated item with other explicit where clauses.

This LTO buffer appears to be an implementation detail of the LLVM backend, as it is not touched by other in-tree backends. Using OnceLock makes it possible to set the buffer through a shared reference. This will be necessary when enforcing scoped access to the other contents of ModuleLlvm.

Codegen code that needs any of `llcx`/`llmod`/`tm` must now access them through a callback, to ensure that the `'ll` lifetimes are coherent and non-static, and don't accidentally escape.

…name A previous PR changed `symbol_edit` to store the undecorated Arm64EC symbol in the set of renamed symbols. While the lookup for symbols in that set did use `undecorate_coff_symbol`, it is possible that we had a untyped reference to a symbol (for example `_RNvCsVsdZgbfeYr_7___rustc12___rust_alloc` or `_RINvNtCs1dnTqovEYZ_3std9panicking11begin_panicReEB4_`), which does not get undecorated hence the lookup fails. The fix is to store the original, decorated name in the set, which also saves having to undecorate when looking up the symbol.

This commit migrates the `test-various` job in CI from testing the `wasm32-wasip1` target to testing the `wasm32-wasip3` target. While doing so this additionally runs tests with `-Cpanic=unwind` instead of the historical `-Cpanic=abort` to expand the scope of tests slightly and run `alloc` tests, for example. The purpose of this change is to start migrating towards a wasm testing target which has a more fully-featured `std`, e.g. panics & threads, to run more tests in CI and make it less of a too-different target. This change was originally proposed at rust-lang/compiler-team/1039 which contains some more background details as well. The major notable change in test coverage here is running tests with `-Cpanic=unwind`. WebAssembly targets by default still use `-Cpanic=abort` and this means that large swaths of the test suite do not execute because they require panicking/unwinding in one way or another. CI here is configuring wasm targets to specifically enable unwinding, but only for the testing build. To achieve this a new `bootstrap.toml` option is added which enables configuring the default `panic_strategy` for wasm targets -- an option only intended to be used in testing. Most of this change is adjusting tests for this new testing infrastructure, some old Wasmtime-related TODOs are cleaned up as well with an updated build. Notably the `only-wasm32-wasip1` directive for compiletest is removed and all preexisting tests are migrated to run for any wasm target. The `run-make` suite in particular is updated to handle when the wasm target outputs components and the various ABI details of the wasip3 target. This change notably does not yet start to run `std`'s test suite for the `wasm32-wasip3` target. Too much of that test suite requires threads to be useful to run at this time, and as such running those tests is delayed until a later time when cooperative threading is enabled. Closes 163451

…saethlin Test panics and wasm32-wasip3 in CI, not wasip1 This commit migrates the `test-various` job in CI from testing the `wasm32-wasip1` target to testing the `wasm32-wasip3` target. While doing so this additionally runs tests with `-Cpanic=unwind` instead of the historical `-Cpanic=abort` to expand the scope of tests slightly and run `alloc` tests, for example. The purpose of this change is to start migrating towards a wasm testing target which has a more fully-featured `std`, e.g. panics & threads, to run more tests in CI and make it less of a too-different target. This change was originally proposed at rust-lang/compiler-team#1039 which contains some more background details as well. The major notable change in test coverage here is running tests with `-Cpanic=unwind`. WebAssembly targets by default still use `-Cpanic=abort` and this means that large swaths of the test suite do not execute because they require panicking/unwinding in one way or another. CI here is configuring wasm targets to specifically enable unwinding, but only for the testing build. To achieve this a new `bootstrap.toml` option is added which enables configuring the default `panic_strategy` for wasm targets -- an option only intended to be used in testing. Most of this change is adjusting tests for this new testing infrastructure, some old Wasmtime-related TODOs are cleaned up as well with an updated build. Notably the `only-wasm32-wasip1` directive for compiletest is removed and all preexisting tests are migrated to run for any wasm target. The `run-make` suite in particular is updated to handle when the wasm target outputs components and the various ABI details of the wasip3 target. This change notably does not yet start to run `std`'s test suite for the `wasm32-wasip3` target. Too much of that test suite requires threads to be useful to run at this time, and as such running those tests is delayed until a later time when cooperative threading is enabled.

…peria Abby: use a smallvec for `And`/`Or` constraints r? khyperia Having option everywhere is kinda annoying and makes logic more involved and distracting 😅 Need to perf this and blocked on rust-lang#164313

…ty, r=petrochenkov Mangle personality symbol Previously, std-internal symbols (like `__rust_alloc` or `rust_panic`) were changed to now be mangled via a v0 scheme with the compiler version hash (`_RNvCs4CIB29Id3dw_7___rustc10rust_panic`) to make it possible to have multiple staticlibs (as long as they have different version hashes) in the same program without symbol conflicts. But the personality function remained unmangled, because LLVM hardcodes that name. I made a change in LLVM llvm/llvm-project#166095 that makes LLVM now check the suffix instead of an exact match, so we can mangle the personality function with this scheme. This removes the last completely unmangled symbol from Rust staticlibs! (though the mangling is still quite weak, so it's still not as nice as it would ideally be). Before, on a trivial staticlib: ``` readelf -s liblib.a | rg GLOBAL | rg -v " UND | HIDDEN " | rg -v ' _ZN' 8: 0000000000000000 5 FUNC GLOBAL DEFAULT 3 _RNvCseCSg29WUqSe_7___rustc12___rust_alloc 10: 0000000000000000 5 FUNC GLOBAL DEFAULT 5 _RNvCseCSg29WUqSe_7___rustc14___rust_dealloc 12: 0000000000000000 5 FUNC GLOBAL DEFAULT 7 _RNvCseCSg29WUqSe_7___rustc14___rust_realloc 14: 0000000000000000 5 FUNC GLOBAL DEFAULT 9 _RNvCseCSg29WUqSe_7___rustc19___rust_alloc_zeroed 16: 0000000000000000 3 FUNC GLOBAL DEFAULT 11 _RNvCseCSg29WUqSe_7___rustc42___rust_alloc_error_handler_should_panic_v2 17: 0000000000000000 1 FUNC GLOBAL DEFAULT 12 _RNvCseCSg29WUqSe_7___rustc35___rust_no_alloc_shim_is_unstable_v2 3383: 0000000000000000 111 FUNC GLOBAL DEFAULT 5 _RNvCseCSg29WUqSe_7___rustc10rust_panic 3387: 0000000000000000 93 FUNC GLOBAL DEFAULT 7 _RNvCseCSg29WUqSe_7___rustc11___rdl_alloc 3390: 0000000000000000 10 FUNC GLOBAL DEFAULT 9 _RNvCseCSg29WUqSe_7___rustc12___rust_abort 3391: 0000000000000000 6 FUNC GLOBAL DEFAULT 11 _RNvCseCSg29WUqSe_7___rustc13___rdl_dealloc 3393: 0000000000000000 167 FUNC GLOBAL DEFAULT 13 _RNvCseCSg29WUqSe_7___rustc13___rdl_realloc 3396: 0000000000000000 203 FUNC GLOBAL DEFAULT 15 _RNvCseCSg29WUqSe_7___rustc17___rust_drop_panic 3399: 0000000000000000 29 FUNC GLOBAL DEFAULT 18 _RNvCseCSg29WUqSe_7___rustc17rust_begin_unwind 3401: 0000000000000000 140 FUNC GLOBAL DEFAULT 20 _RNvCseCSg29WUqSe_7___rustc18___rdl_alloc_zeroed 3404: 0000000000000000 203 FUNC GLOBAL DEFAULT 22 _RNvCseCSg29WUqSe_7___rustc24___rust_foreign_exception 3405: 0000000000000000 19 FUNC GLOBAL DEFAULT 25 _RNvCseCSg29WUqSe_7___rustc26___rust_alloc_error_handler 4410: 0000000000000000 1471 FUNC GLOBAL DEFAULT 2752 rust_eh_personality 25: 0000000000000000 161 FUNC GLOBAL DEFAULT 5 _RNvCseCSg29WUqSe_7___rustc18___rust_start_panic 32: 0000000000000000 82 FUNC GLOBAL DEFAULT 8 _RNvCseCSg29WUqSe_7___rustc20___rust_panic_cleanup 249: 0000000000000000 182 FUNC GLOBAL DEFAULT 5 _RNvCseCSg29WUqSe_7___rustc25___rdl_alloc_error_handler 3: 0000000000000000 57 FUNC GLOBAL DEFAULT 3 _RNvCseCSg29WUqSe_7___rustc17___rust_probestack ``` After: ``` 8: 0000000000000000 5 FUNC GLOBAL DEFAULT 3 _RNvCs4CIB29Id3dw_7___rustc12___rust_alloc 10: 0000000000000000 5 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc14___rust_dealloc 12: 0000000000000000 5 FUNC GLOBAL DEFAULT 7 _RNvCs4CIB29Id3dw_7___rustc14___rust_realloc 14: 0000000000000000 5 FUNC GLOBAL DEFAULT 9 _RNvCs4CIB29Id3dw_7___rustc19___rust_alloc_zeroed 16: 0000000000000000 3 FUNC GLOBAL DEFAULT 11 _RNvCs4CIB29Id3dw_7___rustc42___rust_alloc_error_handler_should_panic_v2 17: 0000000000000000 1 FUNC GLOBAL DEFAULT 12 _RNvCs4CIB29Id3dw_7___rustc35___rust_no_alloc_shim_is_unstable_v2 422: 0000000000000000 19 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc26___rust_alloc_error_handler 429: 0000000000000000 308 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc19rust_eh_personality 349: 0000000000000000 10 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc12___rust_abort 164: 0000000000000000 93 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc11___rdl_alloc 167: 0000000000000000 11 FUNC GLOBAL DEFAULT 7 _RNvCs4CIB29Id3dw_7___rustc13___rdl_dealloc 169: 0000000000000000 167 FUNC GLOBAL DEFAULT 9 _RNvCs4CIB29Id3dw_7___rustc13___rdl_realloc 172: 0000000000000000 140 FUNC GLOBAL DEFAULT 11 _RNvCs4CIB29Id3dw_7___rustc18___rdl_alloc_zeroed 688: 0000000000000000 106 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc10rust_panic 693: 0000000000000000 207 FUNC GLOBAL DEFAULT 7 _RNvCs4CIB29Id3dw_7___rustc17___rust_drop_panic 696: 0000000000000000 29 FUNC GLOBAL DEFAULT 10 _RNvCs4CIB29Id3dw_7___rustc17rust_begin_unwind 698: 0000000000000000 207 FUNC GLOBAL DEFAULT 12 _RNvCs4CIB29Id3dw_7___rustc24___rust_foreign_exception 26: 0000000000000000 161 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc18___rust_start_panic 33: 0000000000000000 82 FUNC GLOBAL DEFAULT 8 _RNvCs4CIB29Id3dw_7___rustc20___rust_panic_cleanup 88: 0000000000000000 182 FUNC GLOBAL DEFAULT 5 _RNvCs4CIB29Id3dw_7___rustc25___rdl_alloc_error_handler 3: 0000000000000000 57 FUNC GLOBAL DEFAULT 3 _RNvCs4CIB29Id3dw_7___rustc17___rust_probestack ``` r? bjorn3

@atmartorana

…r=petrochenkov Add aarch64-unknown-qtee as a tier 3 target This PR adds support for [Qualcomm's Trusted Execution Environment - QTEE](https://docs.qualcomm.com/doc/80-70018-11/topic/qualcomm-trusted-execution-environment.html) as a Tier 3 target. MCP: rust-lang/compiler-team#1038 ## Target Tier Policy Acknowledgements > A tier 3 target must have a designated developer or developers (the "target maintainers") on record to be CCed when issues arise regarding the target. (The mechanism to track and CC such developers may evolve over time.) * Antonio Martorana (@atmartorana) - amartora@qti.qualcomm.com * Gaurav Kashyap - gaurkash@qti.qualcomm.com * Neal Haas - nhaas@qti.qualcomm.com * As a fallback rustzone@qti.qualcomm.com can be contacted > Targets must use naming consistent with any existing targets; for instance, a target for the same CPU or OS as an existing Rust target should use the same name for that CPU or OS. Targets should normally use the same names and naming conventions as used elsewhere in the broader ecosystem beyond Rust (such as in other toolchains), unless they have a very good reason to diverge. Changing the name of a target can be highly disruptive, especially once the target reaches a higher tier, so getting the name right is important even for a tier 3 target. The new target, `aarch64-unknown-qtee` follows the existing naming convention for similar targets. > Target names should not introduce undue confusion or ambiguity unless absolutely necessary to maintain ecosystem compatibility. For example, if the name of the target makes people extremely likely to form incorrect beliefs about what it targets, the name should be changed or augmented to disambiguate it. 👍 > Tier 3 targets may have unusual requirements to build or use, but must not create legal issues or impose onerous legal terms for the Rust project or for Rust developers or users. There are no known legal issues or license incompatibilities. > Neither this policy nor any decisions made regarding targets shall create any binding agreement or estoppel by any party. If any member of an approving Rust team serves as one of the maintainers of a target, or has any legal or employment requirement (explicit or implicit) that might affect their decisions regarding a target, they must recuse themselves from any approval decisions regarding the target's tier status, though they may otherwise participate in discussions. 👍 > Tier 3 targets should attempt to implement as much of the standard libraries as possible and appropriate (core for most targets, alloc for targets that can support dynamic memory allocation, std for targets with an operating system or equivalent layer of system-provided functionality), but may leave some code unimplemented (either unavailable or stubbed out as appropriate), whether because the target makes it impossible to implement or challenging to implement. The authors of pull requests are not obligated to avoid calling any portions of the standard library on the basis of a tier 3 target not implementing those portions. This PR only adds the target. `alloc` and `std` support is being worked on and will be added in an upcoming PR. To expand on the above: QTEE does support dynamic memory allocation. `std` features where QTEE will provide support for: `backtrace`, `fs`, `thread`, and `time`. QTEE does not support `args`, `io`, `net`, `os`, `pipe`, `process`, and `env`. Remaining `std` features not mentioned above will either be marked as unsupported or implemented. > The target must provide documentation for the Rust community explaining how to build for the target, using cross-compilation if possible. If the target supports running binaries, or running tests (even if they do not pass), the documentation must explain how to run such binaries or tests for the target, using emulation if possible or dedicated hardware if necessary. 👍 > Tier 3 targets must not impose burden on the authors of pull requests, or other developers in the community, to maintain the target. In particular, do not post comments (automated or manual) on a PR that derail or suggest a block on the PR based on a tier 3 target. Do not send automated messages or notifications (via any medium, including via @) to a PR author or others involved with a PR regarding a tier 3 target, unless they have opted into such messages. 👍 > Patches adding or updating tier 3 targets must not break any existing tier 2 or tier 1 target, and must not knowingly break another tier 3 target without approval of either the compiler team or the maintainers of the other tier 3 target. 👍 > Tier 3 targets must be able to produce assembly using at least one of rustc’s supported backends from any host target. (Having support in a fork of the backend is not sufficient, it must be upstream.) Building for `aarch64-unknown-qtee` uses upstream LLVM as the backend 👍 r? compiler

@nikomatsakis

…gs-ice, r=nikomatsakis Fix ICE when move expressions reference out-of-scope local bindings I have added a diagnostic for rejecting out-of-scope local bindings in move expressions. `tests/ui/move-expr/closure-local-bindings.rs` and `tests/ui/move-expr/move-initializer-local-bindings.rs` are generated by LLM. r? @nikomatsakis

[coff] Symbol renaming stored the original name, not the undecorated name PR rust-lang#163462 changed `symbol_edit` to store the undecorated Arm64EC symbol in the set of renamed symbols. While the lookup for symbols in that set did use `undecorate_coff_symbol`, it is possible that we had a untyped reference to a symbol (for example `_RNvCsVsdZgbfeYr_7___rustc12___rust_alloc` or `_RINvNtCs1dnTqovEYZ_3std9panicking11begin_panicReEB4_`), which does not get undecorated hence the lookup fails. The fix is to store the original, decorated name in the set, which also saves having to undecorate when looking up the symbol. LLM disclosure: Used Copilot to root cause the original "unresolved external symbol" issue and to automate testing to validate that 1) Arm64EC was actually fixed by this change and 2) x86 was not regressed. Fix was written by hand.

…xdexh,ShoyuVanilla Improve diagnostics for non-well-formed associated items Fixes rust-lang#162368. With the new solver, this ended up as a projection mismatch instead of reporting the `Sized` requirement from the associated type. I changed the diagnostic fallback to also check the associated item's own clauses, so it can recover the `Self: Sized` obligation and report E0277 instead. This works the same way for any other `Self: Trait` bound on the item, not just `Sized`. In this case, the diagnostic now points to the impl type parameter instead of `i32`, and keeps the note for the associated type bound. The `Sized`-specific special casing from the first version is gone after review feedback; in particular, the implicit-`Sized` relaxation suggestion is now skipped when the failing obligation comes from an explicit where clause of the item, where relaxing the implicit restriction wouldn't help. I also added regression tests for the original case, an existing where-clause, the normal implicit `Sized` case, and a non-impl projection use site.

JonathanBrouwer · 2026-10-15T12:13:59Z

@bors r+ p=5 force

Trying commonly failed jobs
@bors try jobs=dist-various-1,test-various,test-x86_64-gnu-aux,test-x86_64-msvc-1,test-aarch64-apple-1,test-aarch64-apple-2,test-x86_64-mingw-1,test-i686-msvc,test-armhf-gnu,test-x86_64-gnu-llvm-22-3

rust-bors · 2026-10-15T12:14:02Z

📌 Commit 494c961 has been approved by JonathanBrouwer

It is now in the queue for this repository.

Rollup of 14 pull requests try-job: dist-various-1 try-job: test-various try-job: test-x86_64-gnu-aux try-job: test-x86_64-msvc-1 try-job: test-aarch64-apple-1 try-job: test-aarch64-apple-2 try-job: test-x86_64-mingw-1 try-job: test-i686-msvc try-job: test-armhf-gnu try-job: test-x86_64-gnu-llvm-22-3

rust-bors · 2026-10-15T15:27:15Z

☀️ Test successful - CI
Approved by: JonathanBrouwer
Duration: 3h 1m 57s
Pushing 3b13d3f to main...

github-actions · 2026-10-15T15:30:48Z

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 8a9dd7a (parent) -> 3b13d3f (this PR)

Test differences

Show 124 test diffs

Stage 0

spec::tests::aarch64_unknown_qtee: [missing] -> pass (J3)

Stage 1

[ui (polonius)] tests/ui/const-generics/function_arg_const_generics/const-param-variadic.rs: [missing] -> pass (J0)
[ui (polonius)] tests/ui/internal/internal-unstable-asm-experimental-arch.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J0)
[ui (polonius)] tests/ui/move-expr/closure-local-bindings.rs: [missing] -> pass (J0)
[ui (polonius)] tests/ui/move-expr/closure-local-uninitialized.rs: [missing] -> pass (J0)
[ui (polonius)] tests/ui/move-expr/move-initializer-local-bindings.rs: [missing] -> pass (J0)
[ui (polonius)] tests/ui/move-expr/name-resolution.rs: ignore (ignored always ((Tracking Issue for move expressions (move(expr)) #155050): currently ICEs instead of reporting a name-resolution error)) -> pass (J0)
[ui (polonius)] tests/ui/target-feature/implicit-features-cli.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J0)
[ui (polonius)] tests/ui/target-feature/implicit-features.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J0)
[ui (polonius)] tests/ui/target-feature/wasm-disable-simd.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J0)
[ui (polonius)] tests/ui/target-feature/wasm-relaxed-simd.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J0)
[ui (polonius)] tests/ui/traits/next-solver/assoc-item-own-bound-diagnostics.rs: [missing] -> pass (J0)
[ui (polonius)] tests/ui/traits/next-solver/assoc-item-own-bound.rs#current: [missing] -> pass (J0)
[ui (polonius)] tests/ui/traits/next-solver/assoc-item-own-bound.rs#next: [missing] -> pass (J0)
[ui] tests/ui/const-generics/function_arg_const_generics/const-param-variadic.rs: [missing] -> pass (J2)
[ui] tests/ui/internal/internal-unstable-asm-experimental-arch.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J2)
[ui] tests/ui/move-expr/closure-local-bindings.rs: [missing] -> pass (J2)
[ui] tests/ui/move-expr/closure-local-uninitialized.rs: [missing] -> pass (J2)
[ui] tests/ui/move-expr/move-initializer-local-bindings.rs: [missing] -> pass (J2)
[ui] tests/ui/move-expr/name-resolution.rs: ignore (ignored always ((Tracking Issue for move expressions (move(expr)) #155050): currently ICEs instead of reporting a name-resolution error)) -> pass (J2)
[ui] tests/ui/target-feature/implicit-features-cli.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J2)
[ui] tests/ui/target-feature/implicit-features.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J2)
[ui] tests/ui/target-feature/wasm-disable-simd.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J2)
[ui] tests/ui/target-feature/wasm-relaxed-simd.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J2)
[ui] tests/ui/traits/next-solver/assoc-item-own-bound-diagnostics.rs: [missing] -> pass (J2)
[ui] tests/ui/traits/next-solver/assoc-item-own-bound.rs#current: [missing] -> pass (J2)
[ui] tests/ui/traits/next-solver/assoc-item-own-bound.rs#next: [missing] -> pass (J2)
[assembly] tests/assembly-llvm/targets/targets-elf.rs#aarch64_unknown_qtee: [missing] -> pass (J3)
[run-make] tests/run-make/wasm-custom-section: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J3)
[run-make] tests/run-make/wasm-custom-sections-opt: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J3)
[run-make] tests/run-make/wasm-export-all-symbols: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J3)
[run-make] tests/run-make/wasm-import-module: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J3)
[run-make] tests/run-make/wasm-panic-small: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J3)
[run-make] tests/run-make/wasm-spurious-import: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J3)
[run-make] tests/run-make/wasm-stringify-ints-small: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J3)
[run-make] tests/run-make/wasm-symbols-different-module: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J3)
[run-make] tests/run-make/wasm-symbols-not-exported: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J3)
[run-make] tests/run-make/wasm-symbols-not-imported: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J3)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/debuginfo.rs: [missing] -> pass (J3)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/diag.rs: [missing] -> pass (J3)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/doc.rs: [missing] -> pass (J3)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/object.rs: [missing] -> pass (J3)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/remap-path-prefix.rs: [missing] -> pass (J3)
spec::tests::aarch64_unknown_qtee: [missing] -> pass (J8)

Stage 2

[run-make] tests/run-make/wasm-custom-section: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J1)
[run-make] tests/run-make/wasm-custom-sections-opt: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J1)
[run-make] tests/run-make/wasm-export-all-symbols: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J1)
[run-make] tests/run-make/wasm-import-module: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J1)
[run-make] tests/run-make/wasm-panic-small: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J1)
[run-make] tests/run-make/wasm-spurious-import: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J1)
[run-make] tests/run-make/wasm-stringify-ints-small: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J1)
[run-make] tests/run-make/wasm-symbols-different-module: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J1)
[run-make] tests/run-make/wasm-symbols-not-exported: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J1)
[run-make] tests/run-make/wasm-symbols-not-imported: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J1)
[ui] tests/ui/const-generics/function_arg_const_generics/const-param-variadic.rs: [missing] -> pass (J4)
[ui] tests/ui/internal/internal-unstable-asm-experimental-arch.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J4)
[ui] tests/ui/move-expr/closure-local-bindings.rs: [missing] -> pass (J4)
[ui] tests/ui/move-expr/closure-local-uninitialized.rs: [missing] -> pass (J4)
[ui] tests/ui/move-expr/move-initializer-local-bindings.rs: [missing] -> pass (J4)
[ui] tests/ui/move-expr/name-resolution.rs: ignore (ignored always ((Tracking Issue for move expressions (move(expr)) #155050): currently ICEs instead of reporting a name-resolution error)) -> pass (J4)
[ui] tests/ui/target-feature/implicit-features-cli.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J4)
[ui] tests/ui/target-feature/implicit-features.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J4)
[ui] tests/ui/target-feature/wasm-disable-simd.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J4)
[ui] tests/ui/target-feature/wasm-relaxed-simd.rs: ignore (only executed when the target is wasm32-wasip1) -> ignore (only executed when the architecture is wasm32) (J4)
[ui] tests/ui/traits/next-solver/assoc-item-own-bound-diagnostics.rs: [missing] -> pass (J4)
[ui] tests/ui/traits/next-solver/assoc-item-own-bound.rs#current: [missing] -> pass (J4)
[ui] tests/ui/traits/next-solver/assoc-item-own-bound.rs#next: [missing] -> pass (J4)
[assembly] tests/assembly-llvm/targets/targets-elf.rs#aarch64_unknown_qtee: [missing] -> pass (J5)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/doc.rs: [missing] -> pass (J6)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/remap-path-prefix.rs: [missing] -> pass (J6)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/debuginfo.rs: [missing] -> pass (J7)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/diag.rs: [missing] -> pass (J7)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/object.rs: [missing] -> pass (J7)
io::cursor::vec_seek_and_write_past_usize_max: [missing] -> pass (J9)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/doc.rs: [missing] -> ignore (ignored when the operating system is windows) (J10)
[rustdoc-json] tests/rustdoc-json/remap-path-prefix/remap-path-prefix.rs: [missing] -> ignore (ignored when the operating system is windows) (J10)

Additionally, 48 doctest diffs were found. These are ignored, as they are noisy.

Job group index

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard 3b13d3fd58d21a6ffd3aa6dec7ae6b299405acd1 --output-dir test-dashboard

And then open test-dashboard/index.html in your browser to see an overview of all executed tests.

Job duration changes

test-x86_64-gnu-gcc-core-tests: 8m 31s -> 18m 12s (+113.7%)
test-pr-check-1: 20m 10s -> 40m 6s (+98.8%)
test-x86_64-msvc-2: 1h 35m -> 2h 41m (+68.9%)
test-x86_64-gnu-aux: 1h 36m -> 2h 38m (+64.8%)
test-x86_64-gnu-stdlib-semver-check: 11m 29s -> 18m 13s (+58.6%)
optional-test-x86_64-gnu-autodiff: 39m 34s -> 1h (+52.2%)
dist-powerpc64le-linux-gnu: 1h 7m -> 1h 38m (+47.4%)
dist-ohos-x86_64: 57m 43s -> 1h 23m (+45.2%)
test-i686-gnu-nopt-2: 1h 21m -> 1h 53m (+39.1%)
test-x86_64-gnu-nopt: 2h 35m -> 1h 37m (-37.7%)

How to interpret the job duration changes?

Job durations can vary a lot, based on the actual runner instance
that executed the job, system noise, invalidated caches, etc. The table above is provided
mostly for t-infra members, for simpler debugging of potential CI slow-downs.

rust-bors · 2026-10-15T15:31:53Z

☀️ Try build successful (CI)
Build commit: d7bc29f (d7bc29fb7f8df9827cbd5f2a90de9462e7970d3e)
Base parent: 8a9dd7a (8a9dd7abdf013ec10cfeaaa3685feba18ef1c90c)

rust-timer · 2026-10-15T16:21:19Z

Finished benchmarking commit (3b13d3f): comparison URL.

Overall result: ❌ regressions - please read:

Our benchmarks found a performance regression caused by this PR.
This might be an actual regression, but it can also be just noise.

Next Steps:

If the regression was expected or you think it can be justified,
please write a comment with sufficient written justification, and add
@rustbot label: +perf-regression-triaged to it, to mark the regression as triaged.
If you think that you know of a way to resolve the regression, try to create
a new PR with a fix for the regression.
If you do not understand the regression or you think that it is just noise,
you can ask the @rust-lang/wg-compiler-performance working group for help (members of this group
were already notified of this PR).

@rustbot label: +perf-regression
cc @rust-lang/wg-compiler-performance

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	0.3%	[0.1%, 0.8%]	15
Regressions ❌ (secondary)	0.4%	[0.2%, 0.9%]	7
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.3%	[0.1%, 0.8%]	15

Max RSS (memory usage)

Results (primary -1.5%, secondary -0.9%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	1.0%	[1.0%, 1.0%]	1
Regressions ❌ (secondary)	3.3%	[3.3%, 3.3%]	1
Improvements ✅ (primary)	-2.8%	[-4.5%, -1.0%]	2
Improvements ✅ (secondary)	-3.0%	[-3.0%, -2.9%]	2
All ❌✅ (primary)	-1.5%	[-4.5%, 1.0%]	3

Cycles

Results (primary 2.0%, secondary -0.7%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	2.0%	[1.4%, 2.5%]	2
Regressions ❌ (secondary)	2.9%	[1.7%, 4.4%]	3
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-11.3%	[-11.3%, -11.3%]	1
All ❌✅ (primary)	2.0%	[1.4%, 2.5%]	2

Binary size

Results (primary 0.4%, secondary 0.2%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	0.4%	[0.1%, 0.4%]	4
Regressions ❌ (secondary)	0.2%	[0.0%, 0.6%]	11
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.4%	[0.1%, 0.4%]	4

Bootstrap: 490.736s -> 492.307s (0.32%)
Artifact size: 407.05 MiB -> 407.14 MiB (0.02%)

rust-bors · 2026-10-15T16:41:46Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#163132	Test panics and wasm32-wasip3 in CI, not wasip1	`5f68626245595b5c886400745389fee745d92383` (link)
#164314	Abby: use a smallvec for `And`/`Or` constraints	`b54a26983f7c569d772854bc3d7959f78e54721e` (link)
#148413	Mangle personality symbol	`7cb32fd90a28f8d06e0a55976798e5584de773a7` (link)
#163688	Add aarch64-unknown-qtee as a tier 3 target	`ce6240587606ed32436143512004ad3cf9cb22a3` (link)
#164076	Fix ICE when move expressions reference out-of-scope local …	`3c1804f118dfac256591c3652e2773d3e2415856` (link)
#164327	[coff] Symbol renaming stored the original name, not the un…	`71ccfd878fe1aa00305330294e8d4310178352cc` (link)
#162432	Improve diagnostics for non-well-formed associated items	`a4af3b4ba22b1d74333e0a93ef9766b2282196d6` (link)
#164138	cg_llvm: Use a callback to enforce scoped lifetimes in Modu…	`902ee3fc5d3c58ff91d5304a3fbbf675f2ffacb0` (link)
#164210	`incomplete` -> `unstable` for delegation feature	`cbc814de3440eda443332cf5cdce2d65e6402e34` (link)
#164225	Point at assoc item for trait that needs to be implemented	`5238fe608cecf143f686376a5512643a2c3b7342` (link)
#164278	Output remapped paths in rustdoc JSON with the `documentati…	`0189fb44a3fde041998da63eb4fc457989d76204` (link)
#164308	format abby dsl errors better	`4d32f229c038ed60a80992d3c0b84673c3968060` (link)
#164335	expand and document tool attribute shadowing test	`fb8bb353ce1af61ede8a6a85fba2e7349d3b7ffd` (link)
#164342	Use regular type parsing for argument-position const parame…	`71382d47c84483501621404c441cbc3a3b4aeb0e` (link)

parent commit: 8a9dd7abdf

In the case of a perf regression, run the following command with the SHAs of each PR you suspect might be the cause: @rust-timer triage $SHA $SHA $SHA..., or run @rust-timer triage all to benchmark all rollup members.

JonathanBrouwer · 2026-10-15T17:16:48Z

@rust-timer triage all

rust-timer · 2026-10-15T17:16:54Z

Running triage with 19 benchmarks

Triage only executes the benchmarks on rollup members, that were changed significantly on the rollup.
For this rollup, these benchmarks are:

bitmaps-3.2.1-new-solver
cargo-0.87.1
cranelift-codegen-0.119.0
derive
eza-0.21.2
image-0.25.6
include-blob
libc-0.2.172
many-assoc-items
match-stress
regex-automata-0.4.8
ripgrep-14.1.1
ripgrep-14.1.1-nll
ripgrep-14.1.1-tiny
serde-1.0.219
stm32f4-0.15.1
syn-2.0.101
tokio-1.53.1
typenum-1.18.0

#163132 `5f68626` Test panics and wasm32-wasip3 in CI, not wasip1

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -4.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-4.3%	[-4.3%, -4.3%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-4.3%	[-4.3%, -4.3%]	1

Cycles

Results (primary 3.0%, secondary -3.8%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	3.0%	[3.0%, 3.0%]	1
Regressions ❌ (secondary)	4.3%	[4.3%, 4.3%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-11.8%	[-11.8%, -11.8%]	1
All ❌✅ (primary)	3.0%	[3.0%, 3.0%]	1

Binary size

This perf run didn't have relevant results for this metric.

#164314 `b54a269` Abby: use a smallvec for `And`/`Or` constraints

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	0.1%	[0.1%, 0.1%]	1
Regressions ❌ (secondary)	0.3%	[0.2%, 0.4%]	7
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.1%	[0.1%, 0.1%]	1

Max RSS (memory usage)

Results (primary -4.4%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-4.4%	[-4.4%, -4.4%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-4.4%	[-4.4%, -4.4%]	1

Cycles

Results (secondary 4.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.3%	[4.3%, 4.3%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Binary size

This perf run didn't have relevant results for this metric.

#148413 `7cb32fd` Mangle personality symbol

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -4.2%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-4.2%	[-4.2%, -4.2%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-4.2%	[-4.2%, -4.2%]	1

Cycles

Results (secondary -3.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.5%	[4.5%, 4.5%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-11.8%	[-11.8%, -11.8%]	1
All ❌✅ (primary)	-	-	0

Binary size

Results (primary -0.2%, secondary -0.1%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.1%	[0.1%, 0.1%]	1
Improvements ✅ (primary)	-0.2%	[-0.2%, -0.1%]	28
Improvements ✅ (secondary)	-0.2%	[-0.2%, -0.1%]	6
All ❌✅ (primary)	-0.2%	[-0.2%, -0.1%]	28

#163688 `ce62405` Add aarch64-unknown-qtee as a tier 3 target

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

This perf run didn't have relevant results for this metric.

Cycles

Results (primary 2.0%, secondary -3.9%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	2.0%	[2.0%, 2.0%]	1
Regressions ❌ (secondary)	3.6%	[3.6%, 3.6%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-11.5%	[-11.5%, -11.5%]	1
All ❌✅ (primary)	2.0%	[2.0%, 2.0%]	1

Binary size

This perf run didn't have relevant results for this metric.

#164076 `3c1804f` Fix ICE when move expressions reference out-of-scope local bindings

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -4.4%, secondary -3.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-4.4%	[-4.4%, -4.4%]	1
Improvements ✅ (secondary)	-3.3%	[-3.3%, -3.3%]	1
All ❌✅ (primary)	-4.4%	[-4.4%, -4.4%]	1

Cycles

Results (secondary -3.7%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.4%	[4.4%, 4.4%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-11.8%	[-11.8%, -11.8%]	1
All ❌✅ (primary)	-	-	0

Binary size

This perf run didn't have relevant results for this metric.

#164327 `71ccfd8` [coff] Symbol renaming stored the original name, not the undecorated name

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

This perf run didn't have relevant results for this metric.

Cycles

Results (secondary -3.8%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.1%	[4.1%, 4.1%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-11.8%	[-11.8%, -11.8%]	1
All ❌✅ (primary)	-	-	0

Binary size

This perf run didn't have relevant results for this metric.

#162432 `a4af3b4` Improve diagnostics for non-well-formed associated items

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -4.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-4.6%	[-4.6%, -4.6%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-4.6%	[-4.6%, -4.6%]	1

Cycles

Results (primary 2.7%, secondary -3.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	2.7%	[2.7%, 2.7%]	1
Regressions ❌ (secondary)	4.4%	[4.4%, 4.4%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-11.5%	[-11.5%, -11.5%]	1
All ❌✅ (primary)	2.7%	[2.7%, 2.7%]	1

Binary size

This perf run didn't have relevant results for this metric.

#164138 `902ee3f` cg_llvm: Use a callback to enforce scoped lifetimes in ModuleLlvm

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -1.7%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	0.9%	[0.9%, 0.9%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-4.3%	[-4.3%, -4.3%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-1.7%	[-4.3%, 0.9%]	2

Cycles

Results (secondary -3.2%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	5.5%	[5.5%, 5.5%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-12.0%	[-12.0%, -12.0%]	1
All ❌✅ (primary)	-	-	0

Binary size

This perf run didn't have relevant results for this metric.

#164210 `cbc814d` `incomplete` -> `unstable` for delegation feature

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -2.9%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-2.9%	[-4.2%, -1.7%]	2
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-2.9%	[-4.2%, -1.7%]	2

Cycles

Results (secondary -3.2%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.3%	[4.3%, 4.3%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-6.9%	[-11.6%, -2.2%]	2
All ❌✅ (primary)	-	-	0

Binary size

This perf run didn't have relevant results for this metric.

#164225 `5238fe6` Point at assoc item for trait that needs to be implemented

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -5.5%, secondary -3.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-5.5%	[-6.8%, -4.3%]	2
Improvements ✅ (secondary)	-3.6%	[-3.6%, -3.6%]	1
All ❌✅ (primary)	-5.5%	[-6.8%, -4.3%]	2

Cycles

Results (secondary -3.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	5.1%	[5.1%, 5.1%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-7.6%	[-11.9%, -3.2%]	2
All ❌✅ (primary)	-	-	0

Binary size

This perf run didn't have relevant results for this metric.

#164278 `0189fb4` Output remapped paths in rustdoc JSON with the `documentation` scope

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	0.4%	[0.2%, 0.8%]	10
Regressions ❌ (secondary)	0.4%	[0.1%, 0.8%]	6
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.4%	[0.2%, 0.8%]	10

Max RSS (memory usage)

Results (primary -4.1%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-4.1%	[-4.1%, -4.1%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-4.1%	[-4.1%, -4.1%]	1

Cycles

Results (secondary -1.7%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.7%	[2.8%, 4.7%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-7.1%	[-11.8%, -2.5%]	2
All ❌✅ (primary)	-	-	0

Binary size

This perf run didn't have relevant results for this metric.

#164308 `4d32f22` format abby dsl errors better

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -4.4%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-4.4%	[-4.4%, -4.4%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-4.4%	[-4.4%, -4.4%]	1

Cycles

Results (secondary -3.8%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.2%	[4.2%, 4.2%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-11.9%	[-11.9%, -11.9%]	1
All ❌✅ (primary)	-	-	0

Binary size

This perf run didn't have relevant results for this metric.

#164335 `fb8bb35` expand and document tool attribute shadowing test

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -2.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-2.6%	[-4.2%, -0.9%]	2
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-2.6%	[-4.2%, -0.9%]	2

Cycles

Results (primary 2.2%, secondary -3.4%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	2.2%	[1.8%, 2.5%]	2
Regressions ❌ (secondary)	4.5%	[4.5%, 4.5%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-7.4%	[-11.6%, -3.2%]	2
All ❌✅ (primary)	2.2%	[1.8%, 2.5%]	2

Binary size

This perf run didn't have relevant results for this metric.

#164342 `71382d4` Use regular type parsing for argument-position const parameters

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.2%	[0.1%, 0.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -3.1%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-3.1%	[-4.6%, -1.6%]	2
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-3.1%	[-4.6%, -1.6%]	2

Cycles

Results (secondary -3.7%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.7%	[4.7%, 4.7%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-12.1%	[-12.1%, -12.1%]	1
All ❌✅ (primary)	-	-	0

Binary size

This perf run didn't have relevant results for this metric.

Noratrieb and others added 30 commits October 4, 2026 17:43

Improve diagnostics for non-well-formed associated items

2e2cd54

incomplete -> unstable for delegation feature

24171c0

Point at assoc item for trait that needs to be implemented

35b8ebc

Simplify associated type bound checks

bee7ba8

Document associated type guard

192d095

Output remapped paths in rustdoc JSON with the DOCUMENTATION scope

f8d4856

Add README.md and descriptions for the remap-path-prefix JSON tests

0d0f404

Use a callback to enforce scoped lifetimes in ModuleLlvm

d3f7014

Codegen code that needs any of `llcx`/`llmod`/`tm` must now access them through a callback, to ensure that the `'ll` lifetimes are coherent and non-static, and don't accidentally escape.

Avoid &'static mut references to an owned llvm::Context

d005c65

add tests for local binding resolution in move expressions

86d1817

reject out-of-scope local bindings in move expressions

1346617

Add aarch64-unknown-qtee as a tier 3 target

533c8d7

Ignore the remap rustdoc-json tests on windows

7fec32e

disallow invalid const parameter types in function signatures

e60c62f

add test with invalid param argument

a85352d

format abby dsl errors better

3f1d1cb

expand and document tool attribute shadowing test

8c2fbbc

no weird Option<AbbyConstraint>

8c2dd05

Rollup merge of rust-lang#164314 - BoxyUwU:abby_allocless_true, r=khy…

c6f3c9d

…peria Abby: use a smallvec for `And`/`Or` constraints r? khyperia Having option everywhere is kinda annoying and makes logic more involved and distracting 😅 Need to perf this and blocked on rust-lang#164313

rust-bors Bot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Oct 15, 2026

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rust-bors Bot added merged-by-bors This PR was explicitly merged by bors. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Oct 15, 2026

rust-bors Bot merged commit 3b13d3f into rust-lang:main Oct 15, 2026
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rustbot added this to the 1.101.0 milestone Oct 15, 2026

rustbot added the perf-regression Performance regression. label Oct 15, 2026

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Rollup of 14 pull requests - #164355

Rollup of 14 pull requests#164355
rust-bors[bot] merged 37 commits into
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rust-timer commented Oct 15, 2026

Overall result: ❌ regressions - please read:

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#163132 5f68626 Test panics and wasm32-wasip3 in CI, not wasip1

#164314 b54a269 Abby: use a smallvec for And/Or constraints

#148413 7cb32fd Mangle personality symbol

#163688 ce62405 Add aarch64-unknown-qtee as a tier 3 target

#164076 3c1804f Fix ICE when move expressions reference out-of-scope local bindings

#164327 71ccfd8 [coff] Symbol renaming stored the original name, not the undecorated name

#162432 a4af3b4 Improve diagnostics for non-well-formed associated items

#164138 902ee3f cg_llvm: Use a callback to enforce scoped lifetimes in ModuleLlvm

#164210 cbc814d incomplete -> unstable for delegation feature

#164225 5238fe6 Point at assoc item for trait that needs to be implemented

#164278 0189fb4 Output remapped paths in rustdoc JSON with the documentation scope

#164308 4d32f22 format abby dsl errors better

#164335 fb8bb35 expand and document tool attribute shadowing test

#164342 71382d4 Use regular type parsing for argument-position const parameters

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#163132 `5f68626` Test panics and wasm32-wasip3 in CI, not wasip1

#164314 `b54a269` Abby: use a smallvec for `And`/`Or` constraints

#148413 `7cb32fd` Mangle personality symbol

#163688 `ce62405` Add aarch64-unknown-qtee as a tier 3 target

#164076 `3c1804f` Fix ICE when move expressions reference out-of-scope local bindings

#164327 `71ccfd8` [coff] Symbol renaming stored the original name, not the undecorated name

#162432 `a4af3b4` Improve diagnostics for non-well-formed associated items

#164138 `902ee3f` cg_llvm: Use a callback to enforce scoped lifetimes in ModuleLlvm

#164210 `cbc814d` `incomplete` -> `unstable` for delegation feature

#164225 `5238fe6` Point at assoc item for trait that needs to be implemented

#164278 `0189fb4` Output remapped paths in rustdoc JSON with the `documentation` scope

#164308 `4d32f22` format abby dsl errors better

#164335 `fb8bb35` expand and document tool attribute shadowing test

#164342 `71382d4` Use regular type parsing for argument-position const parameters