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Description of problem: PyQwt segfaults when attempting to do a plot Version-Release number of selected component (if applicable): PyQwt-5.2.0-30.fc24.x86_64 How reproducible: Always Steps to Reproduce: 1. $ gdb python 2. (gdb) run 3. import numpy as np from PyQt4.Qt import * from PyQt4.Qwt5 import * from PyQt4.Qwt5.qplt import * x = np.arange(-2*np.pi, 2*np.pi, 0.01) p = Plot( Curve(x, np.cos(x), Pen(Magenta, 2), "cos(x)"), Curve(x, np.exp(x), Pen(Red), "exp(x)", Y2), Axis(Y2, Log), "PyQwt using Qwt-%s -- http://qwt.sf.net" % QWT_VERSION_STR) Actual results: [jennings@weimar Desktop]$ gdb python GNU gdb (GDB) Fedora 7.11.1-86.fc24 Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-redhat-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from python...Reading symbols from /home/jennings/Desktop/python...(no debugging symbols found)...done. (no debugging symbols found)...done. Missing separate debuginfos, use: dnf debuginfo-install python-2.7.12-6.fc24.x86_64 (gdb) run Starting program: /usr/bin/python [Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib64/libthread_db.so.1". Python 2.7.12 (default, Sep 29 2016, 13:30:34) [GCC 6.2.1 20160916 (Red Hat 6.2.1-2)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import numpy as np >>> from PyQt4.Qt import * >>> from PyQt4.Qwt5 import * >>> from PyQt4.Qwt5.qplt import * >>> application = QApplication([]) >>> x = np.arange(-2*np.pi, 2*np.pi, 0.01) >>> p = Plot( ... Curve(x, np.cos(x), Pen(Magenta, 2), "cos(x)"), ... Curve(x, np.exp(x), Pen(Red), "exp(x)", Y2), ... Axis(Y2, Log), ... "PyQwt using Qwt-%s -- http://qwt.sf.net" % QWT_VERSION_STR) Program received signal SIGSEGV, Segmentation fault. 0x0000000000000000 in ?? () (gdb) bt #0 0x0000000000000000 in () #1 0x00007fffd82d139d in cast_QwtPicker () at /usr/lib64/python2.7/site-packages/PyQt4/Qwt5/Qwt.so #2 0x00007fffecf08ee1 in add_aliases () at /usr/lib64/python2.7/site-packages/sip.so #3 0x00007fffecf08ea2 in add_aliases () at /usr/lib64/python2.7/site-packages/sip.so #4 0x00007fffecf08ea2 in add_aliases () at /usr/lib64/python2.7/site-packages/sip.so #5 0x00007fffecefd732 in sipSimpleWrapper_init () at /usr/lib64/python2.7/site-packages/sip.so #6 0x00007ffff7a9adbe in type_call () at /usr/lib64/libpython2.7.so.1.0 #7 0x00007ffff7a44fd3 in PyObject_Call () at /usr/lib64/libpython2.7.so.1.0 #8 0x00007ffff7adce36 in PyEval_EvalFrameEx () at /usr/lib64/libpython2.7.so.1.0 #9 0x00007ffff7ae102c in PyEval_EvalCodeEx () at /usr/lib64/libpython2.7.so.1.0 #10 0x00007ffff7a69d3c in function_call () at /usr/lib64/libpython2.7.so.1.0 #11 0x00007ffff7a44fd3 in PyObject_Call () at /usr/lib64/libpython2.7.so.1.0 #12 0x00007ffff7a53e2c in instancemethod_call () at /usr/lib64/libpython2.7.so.1.0 #13 0x00007ffff7a44fd3 in PyObject_Call () at /usr/lib64/libpython2.7.so.1.0 #14 0x00007ffff7a9c0f7 in slot_tp_init () at /usr/lib64/libpython2.7.so.1.0 #15 0x00007ffff7a9adbe in type_call () at /usr/lib64/libpython2.7.so.1.0 #16 0x00007ffff7a44fd3 in PyObject_Call () at /usr/lib64/libpython2.7.so.1.0 #17 0x00007ffff7adce36 in PyEval_EvalFrameEx () at /usr/lib64/libpython2.7.so.1.0 #18 0x00007ffff7ae102c in PyEval_EvalCodeEx () at /usr/lib64/libpython2.7.so.1.0 #19 0x00007ffff7ae1119 in PyEval_EvalCode () at /usr/lib64/libpython2.7.so.1.0 #20 0x00007ffff7afa4ff in run_mod () at /usr/lib64/libpython2.7.so.1.0 #21 0x00007ffff7afc5ba in PyRun_InteractiveOneFlags () at /usr/lib64/libpython2.7.so.1.0 #22 0x00007ffff7afc79e in PyRun_InteractiveLoopFlags () at /usr/lib64/libpython2.7.so.1.0 #23 0x00007ffff7afce1e in PyRun_AnyFileExFlags () at /usr/lib64/libpython2.7.so.1.0 #24 0x00007ffff7b0e930 in Py_Main () at /usr/lib64/libpython2.7.so.1.0 #25 0x00007ffff6d2d731 in __libc_start_main (main= 0x5555555547b0 <main>, argc=1, argv=0x7fffffffd268, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffd258) at ../csu/libc-start.c:289 #26 0x00005555555547e9 in _start () (gdb) q Expected results: No segfault! Additional info: I saw this originally when trying to run pymca, but I think the problem is in PyQwt
Oops - I missed a line in the steps to reproduce - should be import numpy as np from PyQt4.Qt import * from PyQt4.Qwt5 import * from PyQt4.Qwt5.qplt import * application = QApplication([]) x = np.arange(-2*np.pi, 2*np.pi, 0.01) p = Plot( Curve(x, np.cos(x), Pen(Magenta, 2), "cos(x)"), Curve(x, np.exp(x), Pen(Red), "exp(x)", Y2), Axis(Y2, Log), "PyQwt using Qwt-%s -- http://qwt.sf.net" % QWT_VERSION_STR)
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