importthreadingimporttimedefhot_loop():# A hot loop involving function calls (time.time) to trigger# Tier 2 JIT optimization.# We run this long enough to ensure it's active during interpreter shutdown.end=time.time()+5.0whiletime.time()<end:pass# 1. Create a daemon thread (crucial: daemon threads are killed/abandoned at shutdown)t=threading.Thread(target=hot_loop,daemon=True)t.start()# 2. Allow brief time for the thread to start and trigger the JIT (Trace/Optimizer)time.sleep(0.1)# 3. Exit immediately.# The daemon thread is still running. The interpreter shutdown process# appears to fail to free the JIT memory allocated for this thread.

===================================================================181062==ERROR: LeakSanitizer: detected memory leaksDirect leak of 261216 byte(s) in 1 object(s) allocated from:    #0 0x614025821fb4 in malloc (/home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/python+0x385fb4) (BuildId: 066bbf729257aedd916af3db6dae04834cf3a8ba)    #1 0x61402634af9e in _PyJit_TryInitializeTracing /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Python/optimizer.c:1028:58    #2 0x614025deb313 in _PyEval_EvalFrameDefault /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Python/generated_cases.c.h:7705:32    #3 0x614025db9387 in _PyEval_EvalFrame /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Include/internal/pycore_ceval.h:118:16    #4 0x614025db9387 in _PyEval_Vector /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Python/ceval.c:2092:12    #5 0x614025a33e8f in _PyObject_VectorcallTstate /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Include/internal/pycore_call.h:136:11    #6 0x614025a31309 in method_vectorcall /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Objects/classobject.c:73:20    #7 0x614025e76ca2 in _PyObject_VectorcallTstate /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Include/internal/pycore_call.h:136:11    #8 0x614025e76ca2 in context_run /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Python/context.c:727:29    #9 0x614025a5397c in method_vectorcall_FASTCALL_KEYWORDS /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Objects/descrobject.c:421:24    #10 0x614025a2735f in _PyObject_VectorcallTstate /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Include/internal/pycore_call.h:136:11    #11 0x614025dba4ec in _Py_VectorCallInstrumentation_StackRefSteal /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Python/ceval.c:762:11    #12 0x614025df62dd in _PyEval_EvalFrameDefault /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Python/generated_cases.c.h:1788:35    #13 0x614025db9387 in _PyEval_EvalFrame /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Include/internal/pycore_ceval.h:118:16    #14 0x614025db9387 in _PyEval_Vector /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Python/ceval.c:2092:12    #15 0x614025a33e8f in _PyObject_VectorcallTstate /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Include/internal/pycore_call.h:136:11    #16 0x614025a31309 in method_vectorcall /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Objects/classobject.c:73:20    #17 0x614025a29b29 in _PyVectorcall_Call /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Objects/call.c:273:16    #18 0x6140265bca0a in thread_run /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Modules/_threadmodule.c:387:21    #19 0x614026424845 in pythread_wrapper /home/fuzz/WorkSpace/FusionFuzzLoop/projects/cpython/cpython/build/../Python/thread_pthread.h:234:5    #20 0x61402581f896 in asan_thread_start(void*) asan_interceptors.cpp.oSUMMARY: AddressSanitizer: 261216 byte(s) leaked in 1 allocation(s).