[libcxx-commits] [libcxx] [libc++] Introduce a standalone __scope_guard and use it in <string> (PR #114867)

[LLVM Continuous Integration via libcxx-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux-bootstrap-asan` running on `sanitizer-buildbot2` while building `libcxx` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/52/builds/3649

<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-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/main.py:72: 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: 87062 of 87063 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.
FAIL: lld :: COFF/icf-safe.s (84200 of 87062)
******************** TEST 'lld :: COFF/icf-safe.s' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -filetype=obj -triple=x86_64-pc-win32 /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s -o /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp1.obj
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -filetype=obj -triple=x86_64-pc-win32 /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s -o /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp1.obj
RUN: at line 3: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -filetype=obj -triple=x86_64-pc-win32 /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/Inputs/icf-safe.s -o /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp2.obj
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -filetype=obj -triple=x86_64-pc-win32 /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/Inputs/icf-safe.s -o /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp2.obj
RUN: at line 4: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link /dll /noentry /out:/home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp.dll /verbose /opt:noref,icf /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp1.obj /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp2.obj 2>&1 | /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link /dll /noentry /out:/home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp.dll /verbose /opt:noref,icf /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp1.obj /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp2.obj
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s
/home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s:15:14: error: CHECK-NOT: excluded string found in input
# CHECK-NOT: {{.}}
             ^
<stdin>:10:1: note: found here
==1688555==Unable to get registers from thread 1688317.
^

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s

-dump-input=help explains the following input dump.

Input was:
<<<<<<
        .
        .
        .
        5: lld-link: Removed f2 
        6: lld-link: Removed f3 
        7: lld-link: Removed f4 
        8: lld-link: Selected g3 
        9: lld-link: Removed g4 
       10: ==1688555==Unable to get registers from thread 1688317. 
not:15     !                                                        error: no match expected
>>>>>>

Step 10 (stage2/asan check) failure: stage2/asan check (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/llvm/utils/lit/lit/main.py:72: 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: 87062 of 87063 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.
FAIL: lld :: COFF/icf-safe.s (84200 of 87062)
******************** TEST 'lld :: COFF/icf-safe.s' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -filetype=obj -triple=x86_64-pc-win32 /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s -o /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp1.obj
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -filetype=obj -triple=x86_64-pc-win32 /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s -o /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp1.obj
RUN: at line 3: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -filetype=obj -triple=x86_64-pc-win32 /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/Inputs/icf-safe.s -o /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp2.obj
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/llvm-mc -filetype=obj -triple=x86_64-pc-win32 /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/Inputs/icf-safe.s -o /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp2.obj
RUN: at line 4: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link /dll /noentry /out:/home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp.dll /verbose /opt:noref,icf /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp1.obj /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp2.obj 2>&1 | /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/lld-link /dll /noentry /out:/home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp.dll /verbose /opt:noref,icf /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp1.obj /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/tools/lld/test/COFF/Output/icf-safe.s.tmp2.obj
+ /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm_build_asan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s
/home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s:15:14: error: CHECK-NOT: excluded string found in input
# CHECK-NOT: {{.}}
             ^
<stdin>:10:1: note: found here
==1688555==Unable to get registers from thread 1688317.
^

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux-bootstrap-asan/build/llvm-project/lld/test/COFF/icf-safe.s

-dump-input=help explains the following input dump.

Input was:
<<<<<<
        .
        .
        .
        5: lld-link: Removed f2 
        6: lld-link: Removed f3 
        7: lld-link: Removed f4 
        8: lld-link: Selected g3 
        9: lld-link: Removed g4 
       10: ==1688555==Unable to get registers from thread 1688317. 
not:15     !                                                        error: no match expected
>>>>>>


```

</details>

https://github.com/llvm/llvm-project/pull/114867