[JonathanBrouwer]

Successful merges:

• require a consistent codegen backend when -Zllvm-target-feature is present #160618 (require a consistent codegen backend when -Zllvm-target-feature is present)
• alloc: Unstably add Vec::repeat and Vec::repeat_in #164043 (alloc: Unstably add Vec::repeat and Vec::repeat_in)
• Use DerefMut and IndexMut before &raw mut autoborrow #164823 (Use DerefMut and IndexMut before &raw mut autoborrow)
• rustdoc: Suggest corrections for reference label typos #165568 (rustdoc: Suggest corrections for reference label typos)
• rustc_codegen_gcc subtree update 2026-11-13 #165924 (rustc_codegen_gcc subtree update 2026-11-13)
• Remove const_struct from rustc_codegen_ssa #165927 (Remove const_struct from rustc_codegen_ssa)
• Replace most uses of type_array with type_byte_array in rustc_codegen_llvm #165928 (Replace most uses of type_array with type_byte_array in rustc_codegen_llvm)
• Emit note for non_exhaustive within defining crate for unreachable_patterns #164362 (Emit note for non_exhaustive within defining crate for unreachable_patterns)
• Fix as str suggestion in subpattern #164997 (Fix as str suggestion in subpattern)
• Small changes to dyn compatibility #165868 (Small changes to dyn compatibility)
• Add #[rustc_test_entrypoint_marker] back ! #165879 (Add #[rustc_test_entrypoint_marker] back !)
• Fix borrowck ICE when a borrow outlives a local in a const block #165903 (Fix borrowck ICE when a borrow outlives a local in a const block)
• Use trim_prefix in bootstrap #165914 (Use trim_prefix in bootstrap)
• tests: accept better behavior on underaligned accesses #165919 (tests: accept better behavior on underaligned accesses)

r? @ghost

Create a similar rollup

[JonathanBrouwer]

@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,test-aarch64-msvc-2

[rust-bors]

📌 Commit 9f072b3 has been approved by JonathanBrouwer

It is now in the queue for this repository.

[rust-log-analyzer]

The job test-aarch64-apple-macos-26-1 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

Caused by:
  unable to update registry `crates-io`

Caused by:
  download of wa/si/wasip1 failed

Caused by:
  [6] Couldn't resolve host name (Could not resolve host: index.crates.io)
Bootstrap failed while executing `--stage 2 test --host=aarch64-apple-darwin --target=aarch64-apple-darwin --skip compiler --skip src`
Currently active steps:

Important

For more information how to resolve CI failures of this job, visit this link.

[rust-bors]

💔 Test for 684dd6e failed: CI. Failed job:

• auto - test-aarch64-apple-macos-26-1 (web logs, enhanced plaintext logs)

[rust-log-analyzer]

The job test-aarch64-msvc-2 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

[RUSTC-TIMING] find_msvc_tools test:false 1.149
[RUSTC-TIMING] cc test:false 1.392
   Compiling compiler_builtins v0.1.160 (C:\a\rust\rust\library\compiler-builtins\compiler-builtins)
[RUSTC-TIMING] build_script_build test:false 0.869
Assertion failed: E <= end() && "Trying to erase past the end.", file C:\a\rust\rust\src\llvm-project\llvm\include\llvm/ADT/TinyPtrVector.h, line 270
[RUSTC-TIMING] core test:false 28.307
error: could not compile `core` (lib)

Caused by:
  process didn't exit successfully: `C:\a\rust\rust\build\bootstrap\debug\rustc 'C:\a\rust\rust\build\bootstrap\debug\rustc' --crate-name core --edition=2024 'library\core\src\lib.rs' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat,unused-externs-silent --crate-type lib --emit=dep-info,metadata,link -Z embed-metadata=no -C opt-level=3 -C embed-bitcode=no -C codegen-units=1 --warn=unexpected_cfgs --check-cfg 'cfg(no_fp_fmt_parse)' --check-cfg 'cfg(feature, values(any()))' --check-cfg 'cfg(target_has_reliable_f16)' --check-cfg 'cfg(target_has_reliable_f16_math)' --check-cfg 'cfg(target_has_reliable_f16b)' --check-cfg 'cfg(target_has_reliable_f128)' --check-cfg 'cfg(target_has_reliable_f128_math)' --check-cfg 'cfg(no_io_statics)' -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf -C debug-assertions=on --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("debug_refcell", "optimize_for_size", "panic_immediate_abort"))' -C metadata=be032579fe0883de -C extra-filename=-4b1355948afd9fb6 --out-dir 'C:\a\rust\rust\build\aarch64-pc-windows-msvc\stage1-std\aarch64-pc-windows-msvc\dist\build\core/4b1355948afd9fb6\out' --target aarch64-pc-windows-msvc -L 'dependency=C:\a\rust\rust\build\aarch64-pc-windows-msvc\stage1-std\dist\build\core/4b1355948afd9fb6\out' -Zannotate-moves '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=packed -Ctarget-feature=+crt-static -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Alinker-messages '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/")' -Z binary-dep-depinfo --force-warn=unused_crate_dependencies` (exit code: 0xc000001d, STATUS_ILLEGAL_INSTRUCTION)
warning: build failed, waiting for other jobs to finish...
Assertion failed: E <= end() && "Trying to erase past the end.", file C:\a\rust\rust\src\llvm-project\llvm\include\llvm/ADT/TinyPtrVector.h, line 270
[RUSTC-TIMING] compiler_builtins test:false 8.531
error: could not compile `compiler_builtins` (lib)

Caused by:
  process didn't exit successfully: `C:\a\rust\rust\build\bootstrap\debug\rustc 'C:\a\rust\rust\build\bootstrap\debug\rustc' --crate-name compiler_builtins --edition=2024 'library\compiler-builtins\compiler-builtins\src\lib.rs' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat,unused-externs-silent --crate-type lib --emit=dep-info,metadata,link -Z embed-metadata=no -C opt-level=3 -C embed-bitcode=no -C codegen-units=10000 -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf -C debug-assertions=on --cfg 'feature="arch"' --cfg 'feature="c"' --cfg 'feature="compiler-builtins"' --cfg 'feature="default"' --cfg 'feature="unmangled-names"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("arch", "c", "compiler-builtins", "default", "mem", "unmangled-names", "unstable-public-internals"))' -C metadata=844a2a35e6b22282 -C extra-filename=-6ae01e573b57cacb --out-dir 'C:\a\rust\rust\build\aarch64-pc-windows-msvc\stage1-std\aarch64-pc-windows-msvc\dist\build\compiler_builtins/6ae01e573b57cacb\out' --target aarch64-pc-windows-msvc -L 'dependency=C:\a\rust\rust\build\aarch64-pc-windows-msvc\stage1-std\dist\build\compiler_builtins/6ae01e573b57cacb\out' --extern 'core=C:\a\rust\rust\build\aarch64-pc-windows-msvc\stage1-std\aarch64-pc-windows-msvc\dist\build\core/4b1355948afd9fb6\out\libcore-4b1355948afd9fb6.rmeta' -Zannotate-moves '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=packed -Ctarget-feature=+crt-static -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Alinker-messages '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/")' -Z binary-dep-depinfo --force-warn=unused_crate_dependencies -L 'native=C:\a\rust\rust\build\aarch64-pc-windows-msvc\stage1-std\aarch64-pc-windows-msvc\dist\build\compiler_builtins/c929816aef3eae97\out' -L 'native=C:\Program Files\Microsoft Visual Studio\18\Enterprise\VC\Tools\MSVC\14.52.37025\atlmfc\lib\arm64' -l static=compiler-rt --cfg intrinsics_enabled --cfg optimizations_enabled --cfg f16_enabled --cfg f128_enabled --cfg mem_unaligned --cfg '__absvdi2="optimized-c"' --cfg '__absvsi2="optimized-c"' --cfg '__absvti2="optimized-c"' --cfg '__addvdi3="optimized-c"' --cfg '__addvsi3="optimized-c"' --cfg '__addvti3="optimized-c"' --cfg '__cmpdi2="optimized-c"' --cfg '__cmpti2="optimized-c"' --cfg '__fe_getround="optimized-c"' --cfg '__fe_raise_inexact="optimized-c"' --cfg '__ffsti2="optimized-c"' --cfg '__int_util="optimized-c"' --cfg '__mulvdi3="optimized-c"' --cfg '__mulvsi3="optimized-c"' --cfg '__mulvti3="optimized-c"' --cfg '__negdf2="optimized-c"' --cfg '__negdi2="optimized-c"' --cfg '__negsf2="optimized-c"' --cfg '__negti2="optimized-c"' --cfg '__negvdi2="optimized-c"' --cfg '__negvsi2="optimized-c"' --cfg '__negvti2="optimized-c"' --cfg '__paritydi2="optimized-c"' --cfg '__paritysi2="optimized-c"' --cfg '__parityti2="optimized-c"' --cfg '__popcountdi2="optimized-c"' --cfg '__popcountsi2="optimized-c"' --cfg '__popcountti2="optimized-c"' --cfg '__subvdi3="optimized-c"' --cfg '__subvsi3="optimized-c"' --cfg '__subvti3="optimized-c"' --cfg '__ucmpdi2="optimized-c"' --cfg '__ucmpti2="optimized-c"' --check-cfg 'cfg(thumb)' --check-cfg 'cfg(thumb1_only)' --check-cfg 'cfg(target_abi_eabihf)' --check-cfg 'cfg(x86_no_sse2)' --check-cfg 'cfg(target_feature, values("vfp2sp", "vfp2"))' --check-cfg 'cfg(assert_no_panic)' --check-cfg 'cfg(intrinsics_enabled)' --check-cfg 'cfg(optimizations_enabled)' --check-cfg 'cfg(f16_enabled)' --check-cfg 'cfg(f128_enabled)' --check-cfg 'cfg(__ashldi3, values("optimized-c"))' --check-cfg 'cfg(__ashlsi3, values("optimized-c"))' --check-cfg 'cfg(__ashrdi3, values("optimized-c"))' --check-cfg 'cfg(__ashrsi3, values("optimized-c"))' --check-cfg 'cfg(__bswapsi2, values("optimized-c"))' --check-cfg 'cfg(__bswapdi2, values("optimized-c"))' --check-cfg 'cfg(__bswapti2, values("optimized-c"))' --check-cfg 'cfg(__divdi3, values("optimized-c"))' --check-cfg 'cfg(__divsi3, values("optimized-c"))' --check-cfg 'cfg(__divmoddi4, values("optimized-c"))' --check-cfg 'cfg(__divmodsi4, values("optimized-c"))' --check-cfg 'cfg(__divmodsi4, values("optimized-c"))' --check-cfg 'cfg(__divmodti4, values("optimized-c"))' --check-cfg 'cfg(__lshrdi3, values("optimized-c"))' --check-cfg 'cfg(__lshrsi3, values("optimized-c"))' --check-cfg 'cfg(__moddi3, values("optimized-c"))' --check-cfg 'cfg(__modsi3, values("optimized-c"))' --check-cfg 'cfg(__muldi3, values("optimized-c"))' --check-cfg 'cfg(__udivdi3, values("optimized-c"))' --check-cfg 'cfg(__udivmoddi4, values("optimized-c"))' --check-cfg 'cfg(__udivmodsi4, values("optimized-c"))' --check-cfg 'cfg(__udivsi3, values("optimized-c"))' --check-cfg 'cfg(__umoddi3, values("optimized-c"))' --check-cfg 'cfg(__umodsi3, values("optimized-c"))' --check-cfg 'cfg(target_feature, values("vis3"))' --check-cfg 'cfg(mem_unaligned)' --check-cfg 'cfg(kernel_user_helpers)'` (exit code: 0xc000001d, STATUS_ILLEGAL_INSTRUCTION)
Bootstrap failed while executing `test --stage 2 --skip=tests --skip=library --skip=tidyselftest`
Currently active steps:
compile::Assemble { target_compiler: Compiler { stage: 2, host: aarch64-pc-windows-msvc, forced_compiler: false } } at src\bootstrap\src\core\build_steps\tool.rs:1385
compile::Rustc { target: aarch64-pc-windows-msvc, build_compiler: Compiler { stage: 1, host: aarch64-pc-windows-msvc, forced_compiler: false }, crates: [] } at src\bootstrap\src\core\build_steps\compile.rs:2343
compile::Std { target: aarch64-pc-windows-msvc, build_compiler: Compiler { stage: 1, host: aarch64-pc-windows-msvc, forced_compiler: false }, crates: [], force_recompile: false, extra_rust_args: [], is_for_mir_opt_tests: false } at src\bootstrap\src\core\build_steps\compile.rs:1064
Build completed unsuccessfully in 1:19:01
make: *** [Makefile:110: ci-msvc-ps1] Error 1
  local time: Fri Nov 13 15:27:58 PST 2026
  network time: Fri, 13 Nov 2026 23:27:58 GMT
##[error]Process completed with exit code 2.
##[group]Run echo "disk usage:"
echo "disk usage:"

[Zalathar]

macOS failure looks bogus, but the MSVC failure in try looks real.

[rust-bors]

PR #165928, which is a member of this rollup, was unapproved.

[rust-bors]

💔 Test for 07d5246 failed: CI. Failed job:

• try - test-aarch64-msvc-2 (web logs, enhanced plaintext logs)