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Description
Crash report
Doing apip install PyQt6 and then running the following script:
fromPyQt6.QtCoreimportQUrl,QTimer,QCoreApplicationapp=QCoreApplication([])timer=QTimer()timer.setInterval(10)timer.timeout.connect(lambda:None)timer.start()print("Running")app.exec()
and then pressing Ctrl-C (or runningsignal 2 in gdb) would normally produce:
Running^CTraceback (most recent call last): File "/home/florian/tmp/repro.py", line 6, in <lambda> timer.timeout.connect(lambda: None)KeyboardInterrupt(in my case, it seems to crash with a SIGIOT after that, but let's ignore that for now...).
However, with Python 3.11.0b1 configured with--with-pydebug, this happens instead:
Running^Cpython: Objects/codeobject.c:814: retreat: Assertion `bounds->ar_start > 0' failed.referring to this line:
Line 814 in5185956
| assert(bounds->ar_start>0); |
I was able to bisect this to944fffe ("GH-88116: Use a compact format to represent end line and column offsets. (GH-91666)",@markshannon).
Error messages
Backtrace:
Details
#0 0x00007ffff7d1636c in ?? () from /usr/lib/libc.so.6#1 0x00007ffff7cc6838 in raise () from /usr/lib/libc.so.6#2 0x00007ffff7cb0535 in abort () from /usr/lib/libc.so.6#3 0x00007ffff7cb045c in ?? () from /usr/lib/libc.so.6#4 0x00007ffff7cbf366 in __assert_fail () from /usr/lib/libc.so.6#5 0x00005555556d6b61 in retreat (bounds=bounds@entry=0x7fffffffbab0) at Objects/codeobject.c:799#6 0x00005555556d9992 in PyCode_Addr2Location (co=<optimized out>, addrq=0, start_line=start_line@entry=0x7fffffffbb40, start_column=start_column@entry=0x7fffffffbb48, end_line=end_line@entry=0x7fffffffbb44, end_column=end_column@entry=0x7fffffffbb4c) at Objects/codeobject.c:902#7 0x000055555581f36e in tb_displayline (tb=tb@entry=0x7ffff44aa7b0, f=f@entry=<_io.StringIO at remote 0x7ffff762b9d0>, filename='/home/florian/tmp/repro.py', lineno=6, frame=Frame 0x7ffff4498600, for file /home/florian/tmp/repro.py, line 6, in <lambda> (), name=<optimized out>, margin_indent=0, margin=0x5555558cc7df "") at Python/traceback.c:799#8 0x000055555581f6e9 in tb_printinternal (tb=tb@entry=0x7ffff44aa7b0, f=f@entry=<_io.StringIO at remote 0x7ffff762b9d0>, limit=limit@entry=1000, indent=indent@entry=0, margin=margin@entry=0x5555558cc7df "") at Python/traceback.c:944#9 0x000055555581f7f9 in _PyTraceBack_Print_Indented (v=v@entry=<traceback at remote 0x7ffff44aa7b0>, indent=0, margin=0x5555558cc7df "", header_margin=header_margin@entry=0x5555558cc7df "", header=0x555555930270 "Traceback (most recent call last):\n", f=f@entry=<_io.StringIO at remote 0x7ffff762b9d0>) at Python/traceback.c:1002#10 0x000055555580b624 in print_exception_traceback (ctx=ctx@entry=0x7fffffffbd20, value=KeyboardInterrupt()) at Python/pythonrun.c:941#11 0x000055555580c499 in print_exception (ctx=ctx@entry=0x7fffffffbd20, value=value@entry=KeyboardInterrupt()) at Python/pythonrun.c:1223#12 0x000055555580c9d7 in print_exception_recursive (ctx=ctx@entry=0x7fffffffbd20, value=value@entry=KeyboardInterrupt()) at Python/pythonrun.c:1508#13 0x000055555580cee9 in _PyErr_Display (file=file@entry=<_io.StringIO at remote 0x7ffff762b9d0>, exception=exception@entry=<type at remote 0x555555a18160>, value=value@entry=KeyboardInterrupt(), tb=tb@entry=<traceback at remote 0x7ffff44aa7b0>) at Python/pythonrun.c:1551#14 0x000055555580d054 in PyErr_Display (exception=<type at remote 0x555555a18160>, value=KeyboardInterrupt(), tb=<traceback at remote 0x7ffff44aa7b0>) at Python/pythonrun.c:1583#15 0x00005555558193ba in sys_excepthook_impl (module=module@entry=<module at remote 0x7ffff78d3770>, exctype=<optimized out>, value=<optimized out>, traceback=<optimized out>) at ./Python/sysmodule.c:738#16 0x0000555555819422 in sys_excepthook (module=<module at remote 0x7ffff78d3770>, args=0x7fffffffbe70, nargs=<optimized out>) at ./Python/clinic/sysmodule.c.h:73#17 0x0000555555719d74 in cfunction_vectorcall_FASTCALL (func=<built-in method excepthook of module object at remote 0x7ffff78d3770>, args=0x7fffffffbe70, nargsf=<optimized out>, kwnames=<optimized out>) at Objects/methodobject.c:427#18 0x00005555556d3231 in _PyObject_VectorcallTstate (tstate=0x555555b378b0 <_PyRuntime+166000>, callable=callable@entry=<built-in method excepthook of module object at remote 0x7ffff78d3770>, args=0x7fffffffbe70, args@entry=0x7fffffffbdf0, nargsf=nargsf@entry=3, kwnames=kwnames@entry=0x0) at ./Include/internal/pycore_call.h:92#19 0x00005555556d332f in _PyObject_FastCallTstate (nargs=3, args=0x7fffffffbdf0, func=<built-in method excepthook of module object at remote 0x7ffff78d3770>, tstate=<optimized out>) at ./Include/internal/pycore_call.h:114#20 _PyObject_FastCall (func=func@entry=<built-in method excepthook of module object at remote 0x7ffff78d3770>, args=args@entry=0x7fffffffbe70, nargs=nargs@entry=3) at Objects/call.c:308#21 0x000055555580d1b5 in _PyErr_PrintEx (tstate=0x555555b378b0 <_PyRuntime+166000>, set_sys_last_vars=set_sys_last_vars@entry=1) at Python/pythonrun.c:825#22 0x000055555580d453 in PyErr_PrintEx (set_sys_last_vars=set_sys_last_vars@entry=1) at Python/pythonrun.c:875#23 0x000055555580d466 in PyErr_Print () at Python/pythonrun.c:881#24 0x00007ffff75170ff in pyqt6_err_print() () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/QtCore.abi3.so#25 0x00007ffff7520c2d in PyQtSlotProxy::unislot(void**) () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/QtCore.abi3.so#26 0x00007ffff7522857 in PyQtSlotProxy::qt_metacall(QMetaObject::Call, int, void**) () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/QtCore.abi3.so#27 0x00007ffff6e1f89d in ?? () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/Qt6/lib/libQt6Core.so.6#28 0x00007ffff6e2e16a in QTimer::timeout(QTimer::QPrivateSignal) () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/Qt6/lib/libQt6Core.so.6#29 0x00007ffff74bd103 in sipQTimer::timerEvent(QTimerEvent*) () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/QtCore.abi3.so#30 0x00007ffff6e1099f in QObject::event(QEvent*) () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/Qt6/lib/libQt6Core.so.6#31 0x00007ffff749acf3 in sipQTimer::event(QEvent*) () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/QtCore.abi3.so#32 0x00007ffff74d75be in sipQCoreApplication::notify(QObject*, QEvent*) () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/QtCore.abi3.so#33 0x00007ffff6dbffba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/Qt6/lib/libQt6Core.so.6#34 0x00007ffff6f4d1db in QTimerInfoList::activateTimers() () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/Qt6/lib/libQt6Core.so.6#35 0x00007ffff7062b3c in ?? () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/Qt6/lib/libQt6Core.so.6#36 0x00007ffff6937163 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0#37 0x00007ffff698d9e9 in ?? () from /usr/lib/libglib-2.0.so.0#38 0x00007ffff69346c5 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0#39 0x00007ffff7062e4a in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/Qt6/lib/libQt6Core.so.6#40 0x00007ffff6dcc1eb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/Qt6/lib/libQt6Core.so.6#41 0x00007ffff6dc7dae in QCoreApplication::exec() () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/Qt6/lib/libQt6Core.so.6#42 0x00007ffff745187f in meth_QCoreApplication_exec () from /home/florian/tmp/.venv-retreat/lib/python3.11/site-packages/PyQt6/QtCore.abi3.so#43 0x000055555571a557 in cfunction_call (func=<built-in method exec of QCoreApplication object at remote 0x7ffff7935f40>, args=(), kwargs=0x0) at Objects/methodobject.c:553#44 0x00005555556d316e in _PyObject_MakeTpCall (tstate=tstate@entry=0x555555b378b0 <_PyRuntime+166000>, callable=callable@entry=<built-in method exec of QCoreApplication object at remote 0x7ffff7935f40>, args=args@entry=0x7ffff781e078, nargs=<optimized out>, keywords=keywords@entry=0x0) at Objects/call.c:214#45 0x00005555556d32b1 in _PyObject_VectorcallTstate (tstate=0x555555b378b0 <_PyRuntime+166000>, callable=callable@entry=<built-in method exec of QCoreApplication object at remote 0x7ffff7935f40>, args=args@entry=0x7ffff781e078, nargsf=<optimized out>, kwnames=kwnames@entry=0x0) at ./Include/internal/pycore_call.h:90#46 0x00005555556d3308 in PyObject_Vectorcall (callable=callable@entry=<built-in method exec of QCoreApplication object at remote 0x7ffff7935f40>, args=args@entry=0x7ffff781e078, nargsf=<optimized out>, kwnames=kwnames@entry=0x0) at Objects/call.c:299#47 0x00005555557c14d2 in _PyEval_EvalFrameDefault (tstate=0x555555b378b0 <_PyRuntime+166000>, frame=0x7ffff781e020, throwflag=<optimized out>) at Python/ceval.c:4776#48 0x00005555557c5c81 in _PyEval_EvalFrame (tstate=tstate@entry=0x555555b378b0 <_PyRuntime+166000>, frame=frame@entry=0x7ffff781e020, throwflag=throwflag@entry=0) at ./Include/internal/pycore_ceval.h:66#49 0x00005555557c5d92 in _PyEval_Vector (tstate=tstate@entry=0x555555b378b0 <_PyRuntime+166000>, func=func@entry=0x7ffff789be30, locals=locals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/home/florian/tmp/repro.py') at remote 0x7ffff773f030>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7ffff78e2ed0>, '__file__': '/home/florian/tmp/repro.py', '__cached__': None, 'QUrl': <PyQt6.sip.wrappertype at remote 0x555555cfee50>, 'QTimer': <PyQt6.sip.wrappertype at remote 0x555555cfd520>, 'QCoreApplication': <PyQt6.sip.wrappertype at remote 0x555555cdd680>, 'app': <QCoreApplication() at remote 0x7ffff7935f40>, 'timer': <QTimer() at remote 0x7ffff4498520>}, args=args@entry=0x0, argcount=argcount@entry=0, kwnames=kwnames@entry=0x0) at Python/ceval.c:6396#50 0x00005555557c5e9d in PyEval_EvalCode (co=co@entry=<code at remote 0x7ffff7778040>, globals=globals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/home/florian/tmp/repro.py') at remote 0x7ffff773f030>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7ffff78e2ed0>, '__file__': '/home/florian/tmp/repro.py', '__cached__': None, 'QUrl': <PyQt6.sip.wrappertype at remote 0x555555cfee50>, 'QTimer': <PyQt6.sip.wrappertype at remote 0x555555cfd520>, 'QCoreApplication': <PyQt6.sip.wrappertype at remote 0x555555cdd680>, 'app': <QCoreApplication() at remote 0x7ffff7935f40>, 'timer': <QTimer() at remote 0x7ffff4498520>}, locals=locals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/home/florian/tmp/repro.py') at remote 0x7ffff773f030>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7ffff78e2ed0>, '__file__': '/home/florian/tmp/repro.py', '__cached__': None, 'QUrl': <PyQt6.sip.wrappertype at remote 0x555555cfee50>, 'QTimer': <PyQt6.sip.wrappertype at remote 0x555555cfd520>, 'QCoreApplication': <PyQt6.sip.wrappertype at remote 0x555555cdd680>, 'app': <QCoreApplication() at remote 0x7ffff7935f40>, 'timer': <QTimer() at remote 0x7ffff4498520>}) at Python/ceval.c:1157#51 0x000055555580aaf4 in run_eval_code_obj (tstate=tstate@entry=0x555555b378b0 <_PyRuntime+166000>, co=co@entry=0x7ffff7778040, globals=globals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/home/florian/tmp/repro.py') at remote 0x7ffff773f030>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7ffff78e2ed0>, '__file__': '/home/florian/tmp/repro.py', '__cached__': None, 'QUrl': <PyQt6.sip.wrappertype at remote 0x555555cfee50>, 'QTimer': <PyQt6.sip.wrappertype at remote 0x555555cfd520>, 'QCoreApplication': <PyQt6.sip.wrappertype at remote 0x555555cdd680>, 'app': <QCoreApplication() at remote 0x7ffff7935f40>, 'timer': <QTimer() at remote 0x7ffff4498520>}, locals=locals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/home/florian/tmp/repro.py') at remote 0x7ffff773f030>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7ffff78e2ed0>, '__file__': '/home/florian/tmp/repro.py', '__cached__': None, 'QUrl': <PyQt6.sip.wrappertype at remote 0x555555cfee50>, 'QTimer': <PyQt6.sip.wrappertype at remote 0x555555cfd520>, 'QCoreApplication': <PyQt6.sip.wrappertype at remote 0x555555cdd680>, 'app': <QCoreApplication() at remote 0x7ffff7935f40>, 'timer': <QTimer() at remote 0x7ffff4498520>}) at Python/pythonrun.c:1713#52 0x000055555580abb1 in run_mod (mod=mod@entry=0x555555c1fd30, filename=filename@entry='/home/florian/tmp/repro.py', globals=globals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/home/florian/tmp/repro.py') at remote 0x7ffff773f030>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7ffff78e2ed0>, '__file__': '/home/florian/tmp/repro.py', '__cached__': None, 'QUrl': <PyQt6.sip.wrappertype at remote 0x555555cfee50>, 'QTimer': <PyQt6.sip.wrappertype at remote 0x555555cfd520>, 'QCoreApplication': <PyQt6.sip.wrappertype at remote 0x555555cdd680>, 'app': <QCoreApplication() at remote 0x7ffff7935f40>, 'timer': <QTimer() at remote 0x7ffff4498520>}, locals=locals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/home/florian/tmp/repro.py') at remote 0x7ffff773f030>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7ffff78e2ed0>, '__file__': '/home/florian/tmp/repro.py', '__cached__': None, 'QUrl': <PyQt6.sip.wrappertype at remote 0x555555cfee50>, 'QTimer': <PyQt6.sip.wrappertype at remote 0x555555cfd520>, 'QCoreApplication': <PyQt6.sip.wrappertype at remote 0x555555cdd680>, 'app': <QCoreApplication() at remote 0x7ffff7935f40>, 'timer': <QTimer() at remote 0x7ffff4498520>}, flags=flags@entry=0x7fffffffc9d8, arena=arena@entry=0x7ffff776c640) at Python/pythonrun.c:1734#53 0x000055555580ac79 in pyrun_file (fp=fp@entry=0x555555b804f0, filename=filename@entry='/home/florian/tmp/repro.py', start=start@entry=257, globals=globals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/home/florian/tmp/repro.py') at remote 0x7ffff773f030>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7ffff78e2ed0>, '__file__': '/home/florian/tmp/repro.py', '__cached__': None, 'QUrl': <PyQt6.sip.wrappertype at remote 0x555555cfee50>, 'QTimer': <PyQt6.sip.wrappertype at remote 0x555555cfd520>, 'QCoreApplication': <PyQt6.sip.wrappertype at remote 0x555555cdd680>, 'app': <QCoreApplication() at remote 0x7ffff7935f40>, 'timer': <QTimer() at remote 0x7ffff4498520>}, locals=locals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/home/florian/tmp/repro.py') at remote 0x7ffff773f030>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7ffff78e2ed0>, '__file__': '/home/florian/tmp/repro.py', '__cached__': None, 'QUrl': <PyQt6.sip.wrappertype at remote 0x555555cfee50>, 'QTimer': <PyQt6.sip.wrappertype at remote 0x555555cfd520>, 'QCoreApplication': <PyQt6.sip.wrappertype at remote 0x555555cdd680>, 'app': <QCoreApplication() at remote 0x7ffff7935f40>, 'timer': <QTimer() at remote 0x7ffff4498520>}, closeit=closeit@entry=1, flags=0x7fffffffc9d8) at Python/pythonrun.c:1629#54 0x000055555580d8cc in _PyRun_SimpleFileObject (fp=fp@entry=0x555555b804f0, filename=filename@entry='/home/florian/tmp/repro.py', closeit=closeit@entry=1, flags=flags@entry=0x7fffffffc9d8) at Python/pythonrun.c:439#55 0x000055555580da80 in _PyRun_AnyFileObject (fp=fp@entry=0x555555b804f0, filename=filename@entry='/home/florian/tmp/repro.py', closeit=closeit@entry=1, flags=flags@entry=0x7fffffffc9d8) at Python/pythonrun.c:78#56 0x000055555582b904 in pymain_run_file_obj (program_name=program_name@entry='/home/florian/tmp/.venv-retreat/bin/python3', filename=filename@entry='/home/florian/tmp/repro.py', skip_source_first_line=0) at Modules/main.c:353#57 0x000055555582ba22 in pymain_run_file (config=config@entry=0x555555b1d910 <_PyRuntime+59600>) at Modules/main.c:372#58 0x000055555582c191 in pymain_run_python (exitcode=exitcode@entry=0x7fffffffcb34) at Modules/main.c:592#59 0x000055555582c3e6 in Py_RunMain () at Modules/main.c:671#60 0x000055555582c460 in pymain_main (args=args@entry=0x7fffffffcb90) at Modules/main.c:701#61 0x000055555582c52f in Py_BytesMain (argc=<optimized out>, argv=<optimized out>) at Modules/main.c:725#62 0x0000555555643722 in main (argc=<optimized out>, argv=<optimized out>) at ./Programs/python.c:15Thebounds values inretreat:
(gdb) pp boundsbounds = autoderefcount="1",[ ar_start = <int> = {"0"} ar_end = <int> = {"2"} ar_line = <int> = {"6"} opaque = <struct _opaque> = {"{...}"} ],<PyCodeAddressRange> = {"{...}"}Args and locals fortb_displayline:
Details
(gdb) info argstb = 0x7ffff44aa7b0f = <_io.StringIO at remote 0x7ffff762b9d0>filename = '/home/florian/tmp/repro.py'lineno = 6frame = Frame 0x7ffff4498600, for file /home/florian/tmp/repro.py, line 6, in <lambda> ()name = <optimized out>margin_indent = 0margin = 0x5555558cc7df ""(gdb) info localsline = <optimized out>res = 0err = 0truncation = -4source_line = 'timer.timeout.connect(lambda: None)'rc = 0code_offset = <optimized out>code = <optimized out>start_line = 1435344176end_line = 21845start_col_byte_offset = 1436689024end_col_byte_offset = 21845__PRETTY_FUNCTION__ = "tb_displayline"start_offset = <optimized out>end_offset = <optimized out>left_end_offset = 93824994118249right_start_offset = -9223372036854775807primary_error_char = 0x7ffff44ad900 ""secondary_error_char = 0x10 <error: Cannot access memory at address 0x10>Your environment
- CPython versions tested on: 3.11.0b1, current 3.11 branch
- Operating system and architecture: Arch Linux x86_64