STINNER Victor <vstin...@python.org> added the comment:
Ok, I'm able to reproduce the crash using: git clone https://github.com/llvm/llvm-project.git cd llvm-project mkdir _build cd _build cmake3 ../llvm -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra" -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=$PWD/install -DPYTHON_EXECUTABLE=$HOME/sources/cpython/_build/install/bin/python3 make -j4 make check-clang-python The crash occurs in the test_access_specifiers() method defined in tests/cindex/test_access_specifiers.py. This test uses ctypes to call functions of the libclang.so dynamic library. I reduced the test case from 4350 lines of Python code to 131 lines of Python which only depends on the standard library and libclang.so. $ cd llvm-project/clang/bindings/python $ wc -l tests/cindex/test_access_specifiers.py tests/cindex/util.py clang/cindex.py 41 tests/cindex/test_access_specifiers.py 90 tests/cindex/util.py 4219 clang/cindex.py 4350 total $ wc -l bug.py 131 bug.py See attached bug.py script. Python 3.7 is fine, whereas Python 3.8 does crash: $ python3.7 bug.py spelling spelling = None _CXString del: obj id=7f0904a6dcb0 spelling = None --- $ python3.8 bug.py spelling spelling = None _CXString del: obj id=7f4fa6180c40 _CXString del: obj id=7f4fa6180ac0 free(): double free detected in tcache 2 Aborted (core dumped) Notice that _CXString.__del__() is only called once in Python 3.7, but called twice in Python 3.8. ---------- Added file: https://bugs.python.org/file48565/bug.py _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue37140> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
