Hi António: Thanks for your recent replies concerning my Qt5 education and also your successful tests of the previous commit.
With commit plplot-5.14.0-16-g02652c9a4 I am virtually positive from valgrind results that I have solved these qt_example memory management issues while still being able to properly delete the PLplot library and the PlotWindow instance. See that commit message for details. The comprehensive test for that commit did not turn up any segfaults for the first time ever! However, that test did turn up an intermittent hang for qt_example on exit similar to what I found in December for pyqt5_example (but no hang for pyqt5_example this time although that example is unchanged). But in this case, I could prove the hang was because the exec method for the qApp never returned control to the main routine of qt_example. See the commit message for documentation I discovered with a google search of the recommended signals and slots procedure for making the current problematic cleanup procedure completely robust and possibly solving these intermittent hang on exit problems I suspect this recommended and documented change is a matter of 15 minutes or so for someone who is expert in Qt5. But that is not me. (For example, I am just learned about Qt signals and slots today.) Of course, I am retired so I have much more time than the rest of the PLplot developers here to work on PLplot. So if you (or someone else here with Qt5 expertise) don't have time/inclination to fix this according to the web prescription I have documented, I do plan to do it myself after a substantial break to work on PLplot components that are a lot easier for me! Alan __________________________ Alan W. Irwin Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); the Time Ephemerides project (timeephem.sf.net); PLplot scientific plotting software package (plplot.sf.net); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
