New submission from STINNER Victor <vstin...@python.org>:
Running tokenize.py in Valgrind emits 2 warnings: $ ./configure --with-valgrind $ make $ echo|PYTHONMALLOC=malloc valgrind ./python Lib/tokenize.py (A) ==30746== Conditional jump or move depends on uninitialised value(s) ==30746== at 0x4A01F7: PyUnicode_Decode (unicodeobject.c:3395) ==30746== by 0x4A01F7: PyUnicode_Decode (unicodeobject.c:3350) ==30746== by 0x4A062E: PyUnicode_FromEncodedObject (unicodeobject.c:3268) ==30746== by 0x4A090D: unicode_new (unicodeobject.c:15125) ==30746== by 0x46F515: type_call (typeobject.c:969) ==30746== by 0x435F82: _PyObject_MakeTpCall (call.c:167) ==30746== by 0x422B3A: _PyObject_Vectorcall (abstract.h:104) ==30746== by 0x422B3A: _PyObject_Vectorcall (abstract.h:96) ==30746== by 0x422B3A: call_function (ceval.c:4984) ==30746== by 0x423C26: _PyEval_EvalFrameDefault (ceval.c:3496) ==30746== by 0x4217D2: function_code_fastcall (call.c:292) ==30746== by 0x4360FC: _PyObject_FastCallDict (call.c:109) ==30746== by 0x436309: _PyObject_Call_Prepend (call.c:447) ==30746== by 0x4731F0: slot_tp_init (typeobject.c:6767) ==30746== by 0x46F562: type_call (typeobject.c:989) (B) ==30746== Conditional jump or move depends on uninitialised value(s) ==30746== at 0x4DC8FF: PyState_AddModule (pystate.c:707) ==30746== by 0x485A5E1: PyInit_zlib (zlibmodule.c:1472) ==30746== by 0x4CA49C: _PyImport_LoadDynamicModuleWithSpec (importdl.c:164) ==30746== by 0x4C8462: _imp_create_dynamic_impl (import.c:2292) ==30746== by 0x4C8462: _imp_create_dynamic (import.c.h:330) ==30746== by 0x570783: cfunction_vectorcall_FASTCALL (methodobject.c:382) ==30746== by 0x435ACD: PyVectorcall_Call (call.c:203) ==30746== by 0x42424F: do_call_core (ceval.c:5031) ==30746== by 0x42424F: _PyEval_EvalFrameDefault (ceval.c:3557) ==30746== by 0x4AF4CF: _PyEval_EvalCodeWithName (ceval.c:4296) ==30746== by 0x435D3F: _PyFunction_Vectorcall (call.c:355) ==30746== by 0x422AA8: _PyObject_Vectorcall (abstract.h:106) ==30746== by 0x422AA8: call_function (ceval.c:4984) ==30746== by 0x428E51: _PyEval_EvalFrameDefault (ceval.c:3465) ==30746== by 0x4217D2: function_code_fastcall (call.c:292) Warning (A) goes away when Python is compiled with gcc -O1. Warning (B) is still present when Python is compiled with gcc -O0. It's unclear to me if it's a false alarm or a real issue. On Fedora, the issue can be seen with: echo|valgrind python3 /usr/lib64/python3.7/tokenize.py On Fedora 30, python3 is Python 3.7.4. Downstream Fedora issue: https://bugzilla.redhat.com/show_bug.cgi?id=1751208 ---------- components: Interpreter Core messages: 351939 nosy: vstinner priority: normal severity: normal status: open title: Valgrind warnings when running tokenize.py versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38118> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
