Crash when printing on Mac

Robert Helling helling at lmu.de
Fri Jul 18 00:47:02 PDT 2014


Hi,

I was going to see what you guys have done wrt printing. But I don’t get there as subsurface crashes reliably when opening the print dialog. Just startup subsurface and hit Cmd-P. Relevant part of stack trace:

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   ???                           	0x00007fff7d88fd60 vtable for __cxxabiv1::__si_class_type_info + 16
1   subsurface                    	0x00000001000c8c60 PrintOptions::initSliderWithLabel(QSlider*, QLabel*, int) + 48 (printoptions.cpp:74)
2   subsurface                    	0x00000001000c86e4 PrintOptions::setup(options*) + 84 (printoptions.cpp:27)
3   subsurface                    	0x00000001000c8680 PrintOptions::PrintOptions(QWidget*, options*) + 208 (printoptions.cpp:13)
4   subsurface                    	0x00000001000c85a5 PrintOptions::PrintOptions(QWidget*, options*) + 37 (printoptions.cpp:13)
5   subsurface                    	0x00000001000c212b PrintDialog::PrintDialog(QWidget*, QFlags<Qt::WindowType>) + 379 (printdialog.cpp:25)
6   subsurface                    	0x00000001000c1f9d PrintDialog::PrintDialog(QWidget*, QFlags<Qt::WindowType>) + 29 (printdialog.cpp:66)
7   subsurface                    	0x000000010008f4fa MainWindow::on_actionPrint_triggered() + 74 (mainwindow.cpp:309)
8   subsurface                    	0x00000001001331a4 MainWindow::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) + 260 (moc_mainwindow.cpp:161)
9   subsurface                    	0x00000001001337ee MainWindow::qt_metacall(QMetaObject::Call, int, void**) + 126 (moc_mainwindow.cpp:251)


Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00007fff7d88fd60

VM Regions Near 0x7fff7d88fd60:
    __DATA                 00007fff7d88e000-00007fff7d88f000 [    4K] rw-/rwx SM=COW  /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Print.framework/Versions/A/Print
--> __DATA                 00007fff7d88f000-00007fff7d891000 [    8K] rw-/rwx SM=COW  /usr/lib/libc++abi.dylib
    unused shlib __DATA    00007fff7d891000-00007fff7d8b1000 [  128K] rw-/rwx SM=COW  system shared lib __DATA not used by this process

Application Specific Information:
Performing @selector(qtDispatcherToQAction:) from sender NSMenuItem 0x10fb5ac50


Running in debugger did not point to anything obvious, maybe except the fact that line 3 of the stack trace is actually


	initSliderWithLabel(ui.sliderPHeight, ui.valuePHeight, printOptions->profile_height);

where ui.sliderPHeight happens to be a NULL pointer. But the exception seems to be thrown before that is tried to be accessed.

Confused:
Robert

PS: Will file a bug as well
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Robert C. Helling     Elite Master Course Theoretical and Mathematical Physics
                      Scientific Coordinator
                      Ludwig Maximilians Universitaet Muenchen, Dept. Physik
                      Phone: +49 89 2180-4523  Theresienstr. 39, rm. B339
                      http://www.atdotde.de

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