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Aborted when debugging python plugin with pdb #27201

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qgib opened this issue Jul 9, 2018 · 2 comments
Closed

Aborted when debugging python plugin with pdb #27201

qgib opened this issue Jul 9, 2018 · 2 comments
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Bug Either a bug report, or a bug fix. Let's hope for the latter! Crash/Data Corruption Feedback Waiting on the submitter for answers Plugins

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@qgib
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qgib commented Jul 9, 2018 •
edited by PeterPetrik
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Author Name: Zhan Li (Zhan Li)
Original Redmine Issue: 19373
Affected QGIS version: 3.2
Redmine category:python_plugins

Hi, I'm not sure if this is the right place to submit this issue for help. But I can't find a solution on google and failed to find a place to submit questions for help. I'm trying to debug a python plugin with pdb, without using IDE following the instruction here: https://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/ide_debugging.html#debugging-using-pdb

The plugin "Value Tool" works well but I just tried to add something I need. I haven't changed anything in the .py files of the plugin except adding the following lines inside the script to test debugging a python plugin in QGIS with pdb.

1. Use pdb for debugging
import pdb
1. These lines allow you to set a breakpoint in the app
pyqtRemoveInputHook()
pdb.set_trace()

I started QGIS from the command line. The plugin was added and activated successfully. However, when I started using it which was supposed to hit the set_trace and enter pdb, the QGIS crashed with the following messages in the terminal.

<QgsPointXY: POINT(-744271.37212066457141191 7997088.80733166635036469)>
1 active rasters, 1 canvas layers
QGIS died on signal 11[New LWP 10462]
[New LWP 10463]
[New LWP 10464]
[New LWP 10465]
[New LWP 10466]
[New LWP 10467]
[New LWP 10470]
[New LWP 10471]
[New LWP 10473]
[New LWP 10480]
[New LWP 10482]
[New LWP 10486]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f26fd0656c2 in __GI___waitpid (pid=10487, stat_loc=0x7ffeb01d406c, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:30
30	../sysdeps/unix/sysv/linux/waitpid.c: No such file or directory.
[Current thread is 1 (Thread 0x7f2700c28380 (LWP 10459))]
#_0  0x00007f26fd0656c2 in __GI___waitpid (pid=10487, stat_loc=0x7ffeb01d406c, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:30
        resultvar = 18446744073709551104
        sc_cancel_oldtype = 0
#_1  0x0000556b04823fde in  ()
#_2  0x00007f26fcfbff20 in <signal handler called> () at /lib/x86_64-linux-gnu/libc.so.6
#_3  0x00007f26a6c13b5b in PyModule_GetState () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_4  0x00007f26500ad3b2 in  () at /usr/lib/python3.6/lib-dynload/readline.cpython-36m-x86_64-linux-gnu.so
#_5  0x00007f26c8b7b441 in rl_initialize () at /usr/lib/x86_64-linux-gnu/libedit.so.2
#_6  0x00007f26500ada79 in PyInit_readline () at /usr/lib/python3.6/lib-dynload/readline.cpython-36m-x86_64-linux-gnu.so
#_7  0x00007f26a6cc4bf3 in _PyImport_LoadDynamicModuleWithSpec () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_8  0x00007f26a6cc2ec7 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_9  0x00007f26a6c129a5 in PyCFunction_Call () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_10 0x00007f26a6ca78c0 in _PyEval_EvalFrameDefault () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_11 0x00007f26a6ca09fa in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_12 0x00007f26a6ca0c92 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_13 0x00007f26a6ca5eb1 in _PyEval_EvalFrameDefault () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_14 0x00007f26a6ca0ff9 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_15 0x00007f26a6ca5eb1 in _PyEval_EvalFrameDefault () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_16 0x00007f26a6ca0ff9 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_17 0x00007f26a6ca5eb1 in _PyEval_EvalFrameDefault () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_18 0x00007f26a6ca0ff9 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_19 0x00007f26a6ca5eb1 in _PyEval_EvalFrameDefault () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_20 0x00007f26a6ca0ff9 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_21 0x00007f26a6ca5eb1 in _PyEval_EvalFrameDefault () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_22 0x00007f26a6ca9747 in _PyFunction_FastCallDict () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_23 0x00007f26a6ba83ae in _PyObject_FastCallDict () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_24 0x00007f26a6ba95f4 in _PyObject_CallMethodIdObjArgs () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_25 0x00007f26a6cc3ddc in PyImport_ImportModuleLevelObject () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_26 0x00007f26a6c9c7e4 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_27 0x00007f26a6c1288a in _PyCFunction_FastCallDict () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_28 0x00007f26a6ca0dff in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_29 0x00007f26a6ca5eb1 in _PyEval_EvalFrameDefault () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_30 0x00007f26a6ca09fa in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_31 0x00007f26a6ca95a9 in _PyFunction_FastCallDict () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_32 0x00007f26a6ba83ae in _PyObject_FastCallDict () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_33 0x00007f26a6ca3230 in _PyEval_EvalFrameDefault () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_34 0x00007f26a6ca09fa in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_35 0x00007f26a6ca95a9 in _PyFunction_FastCallDict () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_36 0x00007f26a6ba83ae in _PyObject_FastCallDict () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_37 0x00007f26a6ba84ac in _PyObject_Call_Prepend () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_38 0x00007f26a6ba8178 in PyObject_Call () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_39 0x00007f26a6c30439 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_40 0x00007f26a6c2b6e2 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_41 0x00007f26a6ba82e9 in _PyObject_FastCallDict () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_42 0x00007f26a6ca0b59 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_43 0x00007f26a6ca5eb1 in _PyEval_EvalFrameDefault () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_44 0x00007f26a6ca0ff9 in  () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_45 0x00007f26a6ca5eb1 in _PyEval_EvalFrameDefault () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_46 0x00007f26a6ca9747 in _PyFunction_FastCallDict () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_47 0x00007f26a6ba83ae in _PyObject_FastCallDict () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_48 0x00007f26a6ba84ac in _PyObject_Call_Prepend () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_49 0x00007f26a6ba8178 in PyObject_Call () at /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0
#_50 0x00007f26a6421c30 in  () at /usr/lib/python3/dist-packages/PyQt5/QtCore.cpython-36m-x86_64-linux-gnu.so
#_51 0x00007f26a6422108 in  () at /usr/lib/python3/dist-packages/PyQt5/QtCore.cpython-36m-x86_64-linux-gnu.so
#_52 0x00007f26a6422390 in  () at /usr/lib/python3/dist-packages/PyQt5/QtCore.cpython-36m-x86_64-linux-gnu.so
#_53 0x00007f26a6422d07 in  () at /usr/lib/python3/dist-packages/PyQt5/QtCore.cpython-36m-x86_64-linux-gnu.so
#_54 0x00007f26fdbd1679 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_55 0x00007f26fb515122 in QgsMapCanvas::xyCoordinates(QgsPointXY const&) () at /usr/lib/libqgis_gui.so.3.2.0
#_56 0x00007f26fb3c3975 in QgsMapCanvas::mouseMoveEvent(QMouseEvent*) () at /usr/lib/libqgis_gui.so.3.2.0
#_57 0x00007f26fe95f038 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_58 0x00007f26fea004be in QFrame::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_59 0x00007f26fec4dbfb in QGraphicsView::viewportEvent(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_60 0x00007f26fdba268c in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_61 0x00007f26fe920805 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_62 0x00007f26fe92864f in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_63 0x00007f26ff47bf3b in QgsApplication::notify(QObject*, QEvent*) () at /usr/lib/libqgis_core.so.3.2.0
#_64 0x00007f26fdba29a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_65 0x00007f26fe927622 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_66 0x00007f26fe97a14b in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_67 0x00007f26fe97c7ba in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_68 0x00007f26fe92082c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_69 0x00007f26fe9280f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#_70 0x00007f26ff47bf3b in QgsApplication::notify(QObject*, QEvent*) () at /usr/lib/libqgis_core.so.3.2.0
#_71 0x00007f26fdba29a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_72 0x00007f26fe164523 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#_73 0x00007f26fe165ff5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#_74 0x00007f26fe13d2eb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#_75 0x00007f26d8bc81c0 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#_76 0x00007f26f1b0a287 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#_77 0x00007f26f1b0a4c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#_78 0x00007f26f1b0a54c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#_79 0x00007f26fdbfb8ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_80 0x00007f26fdba09ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_81 0x00007f26fdba9a84 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#_82 0x0000556b048208a6 in  ()
#_83 0x00007f26fcfa2b97 in __libc_start_main (main=0x556b0481e5a0, argc=1, argv=0x7ffeb01d7d08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffeb01d7cf8) at ../csu/libc-start.c:310
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 8404711572231051399, 93918125504960, 140731853143296, 0, 0, 2416429254252320903, 2321737910928038023}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7f2700a82733 <_dl_init+259>, 0x7f2700a44638}, data = {prev = 0x0, cleanup = 0x0, canceltype = 11020083}}}
        not_first_call = <optimized out>
#_84 0x0000556b048239ea in _start ()
gdb returned 0
Aborted
@qgib qgib added Bug Either a bug report, or a bug fix. Let's hope for the latter! Plugins Crash/Data Corruption labels May 25, 2019
@PeterPetrik
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link to docs changed to https://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/plugins/ide_debugging.html#debugging-using-pdb

@PeterPetrik
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I suggest to use FirstAid Plugin as suggested in the help https://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/plugins/ide_debugging.html#useful-plugins-for-writing-python-plugins

@gioman I suggest to close this issue from redmine as it is hardly possible to replicate and definitely not worth since the FirstAid plugin debugging is recommended.

@PeterPetrik PeterPetrik added the Feedback Waiting on the submitter for answers label Oct 2, 2020
@gioman gioman closed this as completed Oct 2, 2020
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