[libcxx-commits] [libcxx] [libc++][type_traits] Implements "A type trait to detect reference binding to temporary" (PR #128649)

[LLVM Continuous Integration via libcxx-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-ubsan` running on `sanitizer-buildbot10` while building `libcxx` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/85/builds/6282

<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-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/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: 86976 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 
FAIL: LLVM-Unit :: Support/./SupportTests/47/88 (79920 of 86976)
******************** TEST 'LLVM-Unit :: Support/./SupportTests/47/88' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/unittests/Support/./SupportTests-LLVM-Unit-1753793-47-88.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=88 GTEST_SHARD_INDEX=47 /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/unittests/Support/./SupportTests
--

Script:
--
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/unittests/Support/./SupportTests --gtest_filter=Caching.WriteAfterCommit
--
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/unittests/Support/Caching.cpp:110: Failure
Value of: llvm::detail::TakeError(CFS->commit())
Expected: succeeded
  Actual: failed  (Failed to rename temporary file /tmp/lit-tmp-kofqsd1m/llvm_test_cache/LLVMTest-18f67a.tmp.o to /tmp/lit-tmp-kofqsd1m/llvm_test_cache/llvmcache-foo: No such file or directory
)


/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/unittests/Support/Caching.cpp:110
Value of: llvm::detail::TakeError(CFS->commit())
Expected: succeeded
  Actual: failed  (Failed to rename temporary file /tmp/lit-tmp-kofqsd1m/llvm_test_cache/LLVMTest-18f67a.tmp.o to /tmp/lit-tmp-kofqsd1m/llvm_test_cache/llvmcache-foo: No such file or directory
)



********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
121.92s: Clang :: Driver/fsanitize.c
83.58s: Clang :: Driver/arm-cortex-cpus-2.c
82.33s: Clang :: Driver/arm-cortex-cpus-1.c
81.90s: Clang :: Preprocessor/riscv-target-features.c
78.03s: Clang :: OpenMP/target_defaultmap_codegen_01.cpp
75.25s: Clang :: OpenMP/target_update_codegen.cpp
63.91s: Clang :: Preprocessor/aarch64-target-features.c
62.52s: Clang :: Preprocessor/arm-target-features.c
58.06s: Clang :: Driver/clang_f_opts.c
Step 11 (stage2/ubsan check) failure: stage2/ubsan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/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: 86976 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 
FAIL: LLVM-Unit :: Support/./SupportTests/47/88 (79920 of 86976)
******************** TEST 'LLVM-Unit :: Support/./SupportTests/47/88' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/unittests/Support/./SupportTests-LLVM-Unit-1753793-47-88.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=88 GTEST_SHARD_INDEX=47 /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/unittests/Support/./SupportTests
--

Script:
--
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/unittests/Support/./SupportTests --gtest_filter=Caching.WriteAfterCommit
--
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/unittests/Support/Caching.cpp:110: Failure
Value of: llvm::detail::TakeError(CFS->commit())
Expected: succeeded
  Actual: failed  (Failed to rename temporary file /tmp/lit-tmp-kofqsd1m/llvm_test_cache/LLVMTest-18f67a.tmp.o to /tmp/lit-tmp-kofqsd1m/llvm_test_cache/llvmcache-foo: No such file or directory
)


/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/unittests/Support/Caching.cpp:110
Value of: llvm::detail::TakeError(CFS->commit())
Expected: succeeded
  Actual: failed  (Failed to rename temporary file /tmp/lit-tmp-kofqsd1m/llvm_test_cache/LLVMTest-18f67a.tmp.o to /tmp/lit-tmp-kofqsd1m/llvm_test_cache/llvmcache-foo: No such file or directory
)



********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
121.92s: Clang :: Driver/fsanitize.c
83.58s: Clang :: Driver/arm-cortex-cpus-2.c
82.33s: Clang :: Driver/arm-cortex-cpus-1.c
81.90s: Clang :: Preprocessor/riscv-target-features.c
78.03s: Clang :: OpenMP/target_defaultmap_codegen_01.cpp
75.25s: Clang :: OpenMP/target_update_codegen.cpp
63.91s: Clang :: Preprocessor/aarch64-target-features.c
62.52s: Clang :: Preprocessor/arm-target-features.c
58.06s: Clang :: Driver/clang_f_opts.c

```

</details>

https://github.com/llvm/llvm-project/pull/128649