Steve Stagg <stest...@gmail.com> added the comment:
Reproducible on master, but doesn't occur with a debug build. My configure: > ./configure --prefix=$PREFIX --exec-prefix=$EPREFIX > --cache-file=../config.cache --without-ensurepip > /dev/null > PYTHONMALLOC=pymalloc_debug $EPREFIX/bin/python3 ../test.py Crash comes out of the child process, I modified example to invoke lldb for child: ``` import os import time import subprocess def daemon(): pid = os.fork() if pid != 0: subprocess.run(["lldb", '-p', str(pid)]) time.sleep(10) os._exit(0) time.sleep(1) daemon() ``` Attaching to the child gives this backtrace: (lldb) bt * thread #1, name = 'python3', stop reason = signal SIGSEGV: invalid address (fault address: 0x0) frame #0: 0x0000564a5a325f9c python3.10`_PyObject_DebugDumpAddress(p=0x0000564a5aa2c630) at obmalloc.c:2457:12 frame #1: 0x0000564a5a326571 python3.10`_PyMem_DebugCheckAddress(func="_PyMem_DebugRawFree", api=<unavailable>, p=<unavailable>) at obmalloc.c:2375:9 * frame #2: 0x0000564a5a326d29 python3.10`_PyMem_DebugRawFree at obmalloc.c:2208:5 frame #3: 0x0000564a5a326d17 python3.10`_PyMem_DebugRawFree(ctx=0x0000564a5a5d37e0, p=0x0000564a5aa2c630) at obmalloc.c:2197 frame #4: 0x0000564a5a3d4aa3 python3.10`PyInterpreterState_Delete(interp=0x0000564a5aa4e6b0) at pystate.c:396:9 frame #5: 0x0000564a5a3d1921 python3.10`Py_FinalizeEx [inlined] finalize_interp_delete(tstate=<unavailable>) at pylifecycle.c:1633:5 frame #6: 0x0000564a5a3d190b python3.10`Py_FinalizeEx at pylifecycle.c:1782 frame #7: 0x0000564a5a2dab80 python3.10`Py_BytesMain at main.c:679:9 frame #8: 0x0000564a5a2dab69 python3.10`Py_BytesMain at main.c:707 frame #9: 0x0000564a5a2dab4f python3.10`Py_BytesMain(argc=<unavailable>, argv=<unavailable>) at main.c:731 frame #10: 0x00007ff2e6251152 libc.so.6`__libc_start_main + 242 frame #11: 0x0000564a5a2d978e python3.10`_start + 46 The call stack is trying to free an interpreter mutex: PyThread_free_lock(interp->id_mutex); ---------- nosy: +stestagg _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42540> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com