[bug #23189] Failure of the relax GUI tests with a segmentation fault - a wxPython 2.8 bug. -- January 15, 2015 - 15:04

URL:
  <http://gna.org/bugs/?23189>

                 Summary: Failure of the relax GUI tests with a segmentation
fault - a wxPython 2.8 bug.
                 Project: relax
            Submitted by: bugman
            Submitted on: Thu 15 Jan 2015 02:04:19 PM UTC
                Category: Test suite
Specific analysis category: All analyses
                Priority: 1 - Later
                Severity: 2 - Minor
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 3.3.4
         Discussion Lock: Any
        Operating System: All systems

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Details:

Due to a bug in wxPython 2.8, triggered by code for the spin viewer GUI
window, the GUI tests will sometimes terminate with a 'Segmentation fault'. 
This only happens when using wxPython 2.8, using 2.9 or higher does not result
in segfaults.  The following bash command will show the problem:

$ rm -f gui_tests.log; for i in {1..10}; do echo Round $i; relax --gui-tests
--time -d >> gui_tests.log 2>&1 || echo -e "\n\nCrash with" $? "\n\n\n" >>
gui_tests.log; done

With wxPython 2.9, I see:

Round 1
Round 2
Round 3
Round 4
Round 5
Round 6
Round 7
Round 8
Round 9
Round 10


With wxPython 2.8, I see:

Round 1
Round 2
Segmentation fault
Round 3
Round 4
Segmentation fault
Round 5
Segmentation fault
Round 6
Round 7
Segmentation fault
Round 8
Segmentation fault
Round 9
Segmentation fault
Round 10


This can be isolated to a few GUI tests with:

$ rm -f gui_tests.log; for i in {1..10}; do echo Round $i; ./relax --gui-tests
--time -d General Noe >> gui_tests.log 2>&1 || echo -e "\n\nCrash with" $?
"\n\n\n" >> gui_tests.log; done
Round 1
Segmentation fault
Round 2
Segmentation fault
Round 3
Segmentation fault
Round 4
Segmentation fault
Round 5
Segmentation fault
Round 6
Segmentation fault
Round 7
Segmentation fault
Round 8
Segmentation fault
Round 9
Round 10
Segmentation fault


After deleting the contents of the update() method in
gui/spin_viewer/tree.py:

$ rm -f gui_tests.log; for i in {1..10}; do echo Round $i; ./relax --gui-tests
--time -d General Noe >> gui_tests.log 2>&1 || echo -e "\n\nCrash with" $?
"\n\n\n" >> gui_tests.log; done
Round 1
Round 2
Round 3
Round 4
Round 5
Round 6
Round 7
Round 8
Round 9
Round 10




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