llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-sie-win` 
running on `sie-win-worker` while building `clang` at step 7 
"test-build-unified-tree-check-all".

Full details are available at: 
https://lab.llvm.org/buildbot/#/builders/46/builds/21949

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

```
Step 7 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'Clang :: SemaCXX/cxx17-compat.cpp' FAILED 
********************
Exit Code: 3221225477

Command Output (stdout):
--
# RUN: at line 1
z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe -cc1 -internal-isystem 
Z:\b\llvm-clang-x86_64-sie-win\build\lib\clang\22\include -nostdsysteminc 
-fsyntax-only -std=c++17 -pedantic -verify 
Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang\test\SemaCXX\cxx17-compat.cpp
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe' -cc1 
-internal-isystem 'Z:\b\llvm-clang-x86_64-sie-win\build\lib\clang\22\include' 
-nostdsysteminc -fsyntax-only -std=c++17 -pedantic -verify 
'Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang\test\SemaCXX\cxx17-compat.cpp'
# note: command had no output on stdout or stderr
# RUN: at line 2
z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe -cc1 -internal-isystem 
Z:\b\llvm-clang-x86_64-sie-win\build\lib\clang\22\include -nostdsysteminc 
-fsyntax-only -std=c++20 -Wc++17-compat-pedantic -verify 
Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang\test\SemaCXX\cxx17-compat.cpp 
-Wno-defaulted-function-deleted
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe' -cc1 
-internal-isystem 'Z:\b\llvm-clang-x86_64-sie-win\build\lib\clang\22\include' 
-nostdsysteminc -fsyntax-only -std=c++20 -Wc++17-compat-pedantic -verify 
'Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang\test\SemaCXX\cxx17-compat.cpp'
 -Wno-defaulted-function-deleted
# .---command stderr------------
# | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ 
and include the crash backtrace, preprocessed source, and associated run script.
# | Stack dump:
# | 0.  Program arguments: 
z:\\b\\llvm-clang-x86_64-sie-win\\build\\bin\\clang.exe -cc1 -internal-isystem 
Z:\\b\\llvm-clang-x86_64-sie-win\\build\\lib\\clang\\22\\include 
-nostdsysteminc -fsyntax-only -std=c++20 -Wc++17-compat-pedantic -verify 
Z:\\b\\llvm-clang-x86_64-sie-win\\llvm-project\\clang\\test\\SemaCXX\\cxx17-compat.cpp
 -Wno-defaulted-function-deleted
# | 1.  
Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang\test\SemaCXX\cxx17-compat.cpp:15:24:
 current parser token ';'
# | 2.  
Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang\test\SemaCXX\cxx17-compat.cpp:13:1:
 parsing struct/union/class body 'B'
# | 3.  
Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang\test\SemaCXX\cxx17-compat.cpp:14:12:
 parsing function body 'B::b'
# | 4.  
Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang\test\SemaCXX\cxx17-compat.cpp:14:12:
 in compound statement ('{}')
# | 5.  
Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang\test\SemaCXX\cxx17-compat.cpp:15:12:
 lambda expression parsing
# | Exception Code: 0xC0000005
# |  #0 0x00007ff6fd7640c0 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2ed40c0)
# |  #1 0x00007ff6fdb7baf9 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x32ebaf9)
# |  #2 0x00007ff6fdb77b80 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x32e7b80)
# |  #3 0x00007ff6fd45d61a 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2bcd61a)
# |  #4 0x00007ff6fd45b9bb 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2bcb9bb)
# |  #5 0x00007ff6fd44a2a6 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2bba2a6)
# |  #6 0x00007ff6fd44d781 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2bbd781)
# |  #7 0x00007ff6fd448672 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2bb8672)
# |  #8 0x00007ff6fd44a875 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2bba875)
# |  #9 0x00007ff6fd445fb8 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2bb5fb8)
# | #10 0x00007ff6fd44b8da 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2bbb8da)
# | #11 0x00007ff6fd4b5a95 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2c25a95)
# | #12 0x00007ff6fd4bc10c 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2c2c10c)
# | #13 0x00007ff6fd4bacd0 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2c2acd0)
# | #14 0x00007ff6fd4b49ee 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2c249ee)
# | #15 0x00007ff6fd4b7874 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2c27874)
# | #16 0x00007ff6fd4002b7 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2b702b7)
# | #17 0x00007ff6fd400529 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2b70529)
# | #18 0x00007ff6fd4360f7 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2ba60f7)
# | #19 0x00007ff6fd438297 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2ba8297)
# | #20 0x00007ff6fd40eebf 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2b7eebf)
# | #21 0x00007ff6fd3ef587 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2b5f587)
# | #22 0x00007ff6fd3efd7d 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2b5fd7d)
# | #23 0x00007ff6fd3f09b0 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2b609b0)
# | #24 0x00007ff6fd3f4f70 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2b64f70)
# | #25 0x00007ff6fd3eb3c1 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x2b5b3c1)
# | #26 0x00007ff6fc7dd40f 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x1f4d40f)
# | #27 0x00007ff6fc7dd206 
(z:\b\llvm-clang-x86_64-sie-win\build\bin\clang.exe+0x1f4d206)
...

```

</details>

https://github.com/llvm/llvm-project/pull/154341
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