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Python 3.9.6 on arm64-darwin (macOS 26.1 Tahoe)
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Exception Type: EXC_BAD_ACCESS (SIGSEGV)
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Exception Subtype: KERN_INVALID_ADDRESS
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ASI Note: "crashed on child side of fork pre-exec"
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Termination: Segmentation fault: 11
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Crashing Thread Stack (Thread 0):
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_os_log_preferences_refresh +56
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os_log_type_enabled +768
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[libnetwork.dylib internal]
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[libnetwork.dylib internal]
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[libnetwork.dylib internal]
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[libnetwork.dylib internal]
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[libnetwork.dylib internal]
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nw_path_access_agent_cache +188
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[libnetwork.dylib internal]
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[libnetwork.dylib internal]
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_nw_path_update_is_viableTm +84
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nw_path_snapshot_path(NWConcrete_nw_path*) +64
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nw_path_evaluator_evaluate(NWConcrete_nw_path_evaluator*, int*) +2308
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nw_path_create_evaluator_for_endpoint +68
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nw_nat64_v4_address_requires_synthesis +240
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_gai_nat64_second_pass +280
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si_addrinfo +1388
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getaddrinfo +168
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_socket.cpython-39-darwin.so (socket.getaddrinfo)
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_PyObject_MakeTpCall +356
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_PyEval_EvalFrameDefault +8728
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_PyFunction_Vectorcall +228
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PyEval_EvalCode +80
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PyRun_SimpleFileExFlags +812
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Py_RunMain +1448
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Py_BytesMain +40
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start +7184
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The crash occurs in Apple's Network framework during NAT64 address synthesis,
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specifically when _os_log_preferences_refresh attempts to access invalid memory
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in a forked child process.
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