[clang] [Clang] Honour [[maybe_unused]] on private fields (PR #187940)

Sun Mar 22 15:29:51 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-hwasan` running on `sanitizer-buildbot11` while building `clang` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/55/builds/25769

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/main.py:74: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 96188 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.
FAIL: lld :: ELF/dtlto/timetrace.test (94190 of 96188)
******************** TEST 'lld :: ELF/dtlto/timetrace.test' FAILED ********************
Exit Code: -6

Command Output (stdout):
--
# RUN: at line 6
rm -rf /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp && split-file /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/lld/test/ELF/dtlto/timetrace.test /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp && cd /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp
# executed command: rm -rf /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp
# note: command had no output on stdout or stderr
# executed command: split-file /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/lld/test/ELF/dtlto/timetrace.test /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp
# note: command had no output on stdout or stderr
# executed command: cd /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp
# note: command had no output on stdout or stderr
# RUN: at line 8
sed 's/@t1/@t2/g' t1.ll > t2.ll
# executed command: sed s/@t1/@t2/g t1.ll
# note: command had no output on stdout or stderr
# RUN: at line 11
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -thinlto-bc t1.ll -o t1.bc
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -thinlto-bc t1.ll -o t1.bc
# note: command had no output on stdout or stderr
# RUN: at line 12
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -thinlto-bc t2.ll -o t2.bc
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -thinlto-bc t2.ll -o t2.bc
# note: command had no output on stdout or stderr
# RUN: at line 15
llvm-ar rcs t1.a t1.bc
# executed command: llvm-ar rcs t1.a t1.bc
# note: command had no output on stdout or stderr
# RUN: at line 16
llvm-ar rcsT t2.thin.a t2.bc
# executed command: llvm-ar rcsT t2.thin.a t2.bc
# note: command had no output on stdout or stderr
# RUN: at line 19
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/llc t1.ll --filetype=obj -o t1.o
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/llc t1.ll --filetype=obj -o t1.o
# note: command had no output on stdout or stderr
# RUN: at line 20
Step 11 (stage2/hwasan check) failure: stage2/hwasan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/main.py:74: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 96188 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.
FAIL: lld :: ELF/dtlto/timetrace.test (94190 of 96188)
******************** TEST 'lld :: ELF/dtlto/timetrace.test' FAILED ********************
Exit Code: -6

Command Output (stdout):
--
# RUN: at line 6
rm -rf /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp && split-file /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/lld/test/ELF/dtlto/timetrace.test /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp && cd /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp
# executed command: rm -rf /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp
# note: command had no output on stdout or stderr
# executed command: split-file /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/lld/test/ELF/dtlto/timetrace.test /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp
# note: command had no output on stdout or stderr
# executed command: cd /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/tools/lld/test/ELF/dtlto/Output/timetrace.test.tmp
# note: command had no output on stdout or stderr
# RUN: at line 8
sed 's/@t1/@t2/g' t1.ll > t2.ll
# executed command: sed s/@t1/@t2/g t1.ll
# note: command had no output on stdout or stderr
# RUN: at line 11
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -thinlto-bc t1.ll -o t1.bc
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -thinlto-bc t1.ll -o t1.bc
# note: command had no output on stdout or stderr
# RUN: at line 12
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -thinlto-bc t2.ll -o t2.bc
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -thinlto-bc t2.ll -o t2.bc
# note: command had no output on stdout or stderr
# RUN: at line 15
llvm-ar rcs t1.a t1.bc
# executed command: llvm-ar rcs t1.a t1.bc
# note: command had no output on stdout or stderr
# RUN: at line 16
llvm-ar rcsT t2.thin.a t2.bc
# executed command: llvm-ar rcsT t2.thin.a t2.bc
# note: command had no output on stdout or stderr
# RUN: at line 19
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/llc t1.ll --filetype=obj -o t1.o
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/llc t1.ll --filetype=obj -o t1.o
# note: command had no output on stdout or stderr
# RUN: at line 20

```

</details>

https://github.com/llvm/llvm-project/pull/187940