[clang] [clang][modules] Prevent deadlock in module cache (PR #182722)
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Sat Feb 21 21:35:32 PST 2026
github-actions[bot] wrote:
<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results
* 52668 tests passed
* 970 tests skipped
* 2 tests failed
## Failed Tests
(click on a test name to see its output)
### Clang
<details>
<summary>Clang.ClangScanDeps/modules-context-hash-from-named-module.cpp</summary>
```
Exit Code: 1
Command Output (stdout):
--
# RUN: at line 5
rm -rf C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp
# executed command: rm -rf 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp'
# note: command had no output on stdout or stderr
# RUN: at line 6
split-file C:\_work\llvm-project\llvm-project\clang\test\ClangScanDeps\modules-context-hash-from-named-module.cpp C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp
# executed command: split-file 'C:\_work\llvm-project\llvm-project\clang\test\ClangScanDeps\modules-context-hash-from-named-module.cpp' 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp'
# note: command had no output on stdout or stderr
# RUN: at line 31
c:\_work\llvm-project\llvm-project\build\bin\clang.exe -std=c++23 -fmodules -fmodules-cache-path=C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/modules-cache C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/main.cpp C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/A.cppm C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/B.cppm -fsyntax-only -fdriver-only -MJ C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/deps.json
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\clang.exe' -std=c++23 -fmodules '-fmodules-cache-path=C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/modules-cache' 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/main.cpp' 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/A.cppm' 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/B.cppm' -fsyntax-only -fdriver-only -MJ 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/deps.json'
# note: command had no output on stdout or stderr
# RUN: at line 36
sed -e '1s/^/[/' -e '$s/,$/]/' -e 's:\\\\\?:/:g' C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/deps.json > C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/compile_commands.json
# executed command: sed -e '1s/^/[/' -e '$s/,$/]/' -e 's:\\\\\?:/:g' 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/deps.json'
# note: command had no output on stdout or stderr
# RUN: at line 39
c:\_work\llvm-project\llvm-project\build\bin\clang-scan-deps.exe -compilation-database=C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/compile_commands.json -format experimental-full | sed 's:\\\\\?:/:g' | c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\clang\test\ClangScanDeps\modules-context-hash-from-named-module.cpp -DPREFIX=C:/_work/llvm-project/llvm-project/build/tools/clang/test/ClangScanDeps/Output/modules-context-hash-from-named-module.cpp.tmp
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\clang-scan-deps.exe' '-compilation-database=C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\modules-context-hash-from-named-module.cpp.tmp/compile_commands.json' -format experimental-full
# .---command stderr------------
# | Diagnostics while scanning dependencies for 'C:/_work/llvm-project/llvm-project/build/tools/clang/test/ClangScanDeps/Output/modules-context-hash-from-named-module.cpp.tmp/B.cppm':
# | C:/_work/llvm-project/llvm-project/build/tools/clang/test/ClangScanDeps/Output/modules-context-hash-from-named-module.cpp.tmp/B.cppm:2:10: fatal error: could not build module 'root'
# `-----------------------------
# error: command failed with exit status: 1
# executed command: sed 's:\\\\\?:/:g'
# note: command had no output on stdout or stderr
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe' 'C:\_work\llvm-project\llvm-project\clang\test\ClangScanDeps\modules-context-hash-from-named-module.cpp' -DPREFIX=C:/_work/llvm-project/llvm-project/build/tools/clang/test/ClangScanDeps/Output/modules-context-hash-from-named-module.cpp.tmp
# .---command stderr------------
# | C:\_work\llvm-project\llvm-project\clang\test\ClangScanDeps\modules-context-hash-from-named-module.cpp:100:16: error: CHECK-NEXT: expected string not found in input
# | // CHECK-NEXT: {
# | ^
# | <stdin>:272:15: note: scanning from here
# | "commands": []
# | ^
# |
# | Input file: <stdin>
# | Check file: C:\_work\llvm-project\llvm-project\clang\test\ClangScanDeps\modules-context-hash-from-named-module.cpp
# |
# | -dump-input=help explains the following input dump.
# |
# | Input was:
# | <<<<<<
# | .
# | .
# | .
# | 267: "input-file": "C:/_work/llvm-project/llvm-project/build/tools/clang/test/ClangScanDeps/Output/modules-context-hash-from-named-module.cpp.tmp/A.cppm"
# | 268: }
# | 269: ]
# | 270: },
# | 271: {
# | 272: "commands": []
# | next:100 X~ error: no match found
# | 273: }
# | next:100 ~~~
# | 274: ]
# | next:100 ~~~
# | 275: }
# | next:100 ~
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1
--
```
</details>
<details>
<summary>Clang.ClangScanDeps/strip-visibility.c</summary>
```
Exit Code: 1
Command Output (stdout):
--
# RUN: at line 1
rm -rf C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp
# executed command: rm -rf 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp'
# note: command had no output on stdout or stderr
# RUN: at line 2
split-file C:\_work\llvm-project\llvm-project\clang\test\ClangScanDeps\strip-visibility.c C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp
# executed command: split-file 'C:\_work\llvm-project\llvm-project\clang\test\ClangScanDeps\strip-visibility.c' 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp'
# note: command had no output on stdout or stderr
# RUN: at line 3
sed -e "s|DIR|C:/_work/llvm-project/llvm-project/build/tools/clang/test/ClangScanDeps/Output/strip-visibility.c.tmp|g" C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp/cdb.json.template > C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp/cdb.json
# executed command: sed -e 's|DIR|C:/_work/llvm-project/llvm-project/build/tools/clang/test/ClangScanDeps/Output/strip-visibility.c.tmp|g' 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp/cdb.json.template'
# note: command had no output on stdout or stderr
# RUN: at line 5
c:\_work\llvm-project\llvm-project\build\bin\clang-scan-deps.exe -compilation-database C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp/cdb.json -format experimental-full -mode preprocess-dependency-directives > C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp/result.txt
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\clang-scan-deps.exe' -compilation-database 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp/cdb.json' -format experimental-full -mode preprocess-dependency-directives
# .---redirected output from 'C:\_work\llvm-project\llvm-project\build\tools\clang\test\ClangScanDeps\Output\strip-visibility.c.tmp/result.txt'
# | {
# | "modules": [
# | {
# | "clang-module-deps": [],
# | "clang-modulemap-file": "C:\\_work\\llvm-project\\llvm-project\\build\\tools\\clang\\test\\ClangScanDeps\\Output\\strip-visibility.c.tmp\\modules\\A\\module.modulemap",
# | "command-line": [
# | "-cc1",
# | "-ferror-limit",
# | "19",
# | "-o",
# | "C:/_work/llvm-project/llvm-project/build/tools/clang/test/ClangScanDeps/Output/strip-visibility.c.tmp/module-cache\\9ID0R5PJZEUYR89RVBLLZ7C6O\\A-9ID0R5PJZEUYR89RVBLLZ7C6O.pcm",
# | "-disable-free",
# | "-emit-module",
# | "-x",
# | "c",
# | "C:\\_work\\llvm-project\\llvm-project\\build\\tools\\clang\\test\\ClangScanDeps\\Output\\strip-visibility.c.tmp\\modules\\A\\module.modulemap",
# | "-tune-cpu",
# | "generic",
# | "-target-cpu",
# | "x86-64",
# | "-triple",
# | "x86_64-pc-windows-msvc19.29.30159",
# | "-fmodules-validate-system-headers",
# | "-fno-modules-prune-non-affecting-module-map-files",
# | "-resource-dir",
# | "c:
# | ...
# `---data was truncated--------
# .---command stderr------------
# | Diagnostics while scanning dependencies for 'C:/_work/llvm-project/llvm-project/build/tools/clang/test/ClangScanDeps/Output/strip-visibility.c.tmp/t3.c':
# | C:/_work/llvm-project/llvm-project/build/tools/clang/test/ClangScanDeps/Output/strip-visibility.c.tmp/t3.c:1:10: fatal error: could not build module 'A'
# `-----------------------------
# error: command failed with exit status: 1
--
```
</details>
If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.
https://github.com/llvm/llvm-project/pull/182722
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