ilya-biryukov wrote:
@ChuanqiXu9 the added test fails under ASAN that reports memory leaks:
```
$ cmake -G Ninja -DLLVM_USE_SANITIZER=Address -DCMAKE_CXX_COMPILER=clang
-DCMAKE_C_COMPILER=clang ../
$ ninja SerializationTests
$ ./tools/clang/unittests/Serialization/SerializationTests
```
produces
```
==4100640==ERROR: LeakSanitizer: detected memory leaks
Indirect leak of 32776 byte(s) in 1 object(s) allocated from:
#0 0x559f90ba330c in calloc
(/usr/local/google/home/ibiryukov/code/llvm-project/build-asan/tools/clang/unittests/Serialization/SerializationTests+0x174d30c)
(BuildId: 4baf7bfc387b0be3)
#1 0x559f910585eb in safe_calloc
/usr/local/google/home/ibiryukov/code/llvm-project/llvm/include/llvm/Support/MemAlloc.h:40:18
#2 0x559f910585eb in AllocateBuckets
/usr/local/google/home/ibiryukov/code/llvm-project/llvm/lib/Support/FoldingSet.cpp:173:40
#3 0x559f910585eb in llvm::FoldingSetBase::FoldingSetBase(unsigned int)
/usr/local/google/home/ibiryukov/code/llvm-project/llvm/lib/Support/FoldingSet.cpp:187:13
#4 0x559f90f34503 in FoldingSetImpl
/usr/local/google/home/ibiryukov/code/llvm-project/llvm/include/llvm/ADT/FoldingSet.h:454:9
#5 0x559f90f34503 in ContextualFoldingSet
/usr/local/google/home/ibiryukov/code/llvm-project/llvm/include/llvm/ADT/FoldingSet.h:636:9
#6 0x559f90f34503 in clang::ASTContext::ASTContext(clang::LangOptions&,
clang::SourceManager&, clang::IdentifierTable&, clang::SelectorTable&,
clang::Builtin::Context&, clang::TranslationUnitKind)
/usr/local/google/home/ibiryukov/code/llvm-project/clang/lib/AST/ASTContext.cpp:920:7
#7 0x559f92667204 in clang::CompilerInstance::createASTContext()
/usr/local/google/home/ibiryukov/code/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:553:23
#8 0x559f928ad79a in
clang::FrontendAction::BeginSourceFile(clang::CompilerInstance&,
clang::FrontendInputFile const&)
/usr/local/google/home/ibiryukov/code/llvm-project/clang/lib/Frontend/FrontendAction.cpp:948:10
#9 0x559f9266fb7d in
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
/usr/local/google/home/ibiryukov/code/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1061:13
#10 0x559f90c13901 in (anonymous
namespace)::LoadSpecLazilyTest::GenerateModuleInterface[abi:cxx11](llvm::StringRef,
llvm::StringRef)
/usr/local/google/home/ibiryukov/code/llvm-project/clang/unittests/Serialization/LoadSpecLazilyTest.cpp:86:5
#11 0x559f90c18b8b in (anonymous
namespace)::LoadSpecLazilyTest_ChainedTest2_Test::TestBody()
/usr/local/google/home/ibiryukov/code/llvm-project/clang/unittests/Serialization/LoadSpecLazilyTest.cpp:227:3
#12 0x559f90e46395 in HandleExceptionsInMethodIfSupported
/usr/local/google/home/ibiryukov/code/llvm-project/third-party/unittest/googletest/src/gtest.cc
#13 0x559f90e46395 in testing::Test::Run()
/usr/local/google/home/ibiryukov/code/llvm-project/third-party/unittest/googletest/src/gtest.cc:2687:5
#14 0x559f90e48ae2 in testing::TestInfo::Run()
/usr/local/google/home/ibiryukov/code/llvm-project/third-party/unittest/googletest/src/gtest.cc:2836:11
#15 0x559f90e4ad74 in testing::TestSuite::Run()
/usr/local/google/home/ibiryukov/code/llvm-project/third-party/unittest/googletest/src/gtest.cc:3015:30
#16 0x559f90e82ee8 in testing::internal::UnitTestImpl::RunAllTests()
/usr/local/google/home/ibiryukov/code/llvm-project/third-party/unittest/googletest/src/gtest.cc:5920:44
#17 0x559f90e811c7 in
HandleExceptionsInMethodIfSupported
/usr/local/google/home/ibiryukov/code/llvm-project/third-party/unittest/googletest/src/gtest.cc
#18 0x559f90e811c7 in testing::UnitTest::Run()
/usr/local/google/home/ibiryukov/code/llvm-project/third-party/unittest/googletest/src/gtest.cc:5484:10
#19 0x559f90e08bfa in RUN_ALL_TESTS
/usr/local/google/home/ibiryukov/code/llvm-project/third-party/unittest/googletest/include/gtest/gtest.h:2317:73
#20 0x559f90e08bfa in main
/usr/local/google/home/ibiryukov/code/llvm-project/third-party/unittest/UnitTestMain/TestMain.cpp:55:10
#21 0x7f0546213c89 in __libc_start_call_main
csu/../sysdeps/nptl/libc_start_call_main.h:58:16
...
SUMMARY: AddressSanitizer: 488922 byte(s) leaked in 529 allocation(s).
```
Maybe revert the change or is there a simple fix forward?
https://github.com/llvm/llvm-project/pull/119333
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