Crash on QApplication::exec()

**Nivek** · 4th April 2011, 21:46

Ah, the line numbers don't match up exactly as I removed some commented out lines from my post. Line 56 refers to the closing brace of the method, line 46 in the code I posted above.

**wysota** · 4th April 2011, 21:51

In that case the crash occurs when destructors are called (most probably the destructor of your vmfdebuger class). Could you post a full debugger backtrace with the binary built in debug mode?

**Nivek** · 4th April 2011, 22:39

Here is the application output for debug mode. Apparently QT wasn't installed correctly, but I don't know how it even compiles if it can't find QtCore, etc? I have no idea where that world clock stuff is coming from. Sorry for my ignorance, but how do I do a proper back trace?

Qt Code:

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Unable to read symbols for QtSql.framework/Versions/4/QtSql (file not found).
Unable to read symbols from "QtSql" (not yet mapped into memory).
Unable to read symbols for QtXml.framework/Versions/4/QtXml (file not found).
Unable to read symbols from "QtXml" (not yet mapped into memory).
Unable to read symbols for QtGui.framework/Versions/4/QtGui (file not found).
Unable to read symbols from "QtGui" (not yet mapped into memory).
Unable to read symbols for QtNetwork.framework/Versions/4/QtNetwork (file not found).
Unable to read symbols from "QtNetwork" (not yet mapped into memory).
Unable to read symbols for QtCore.framework/Versions/4/QtCore (file not found).
Unable to read symbols from "QtCore" (not yet mapped into memory).
Could not find object file "/private/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/examples/designer/customwidgetplugin/.obj/debug-shared/analogclock.o" - no debug information available for "analogclock.cpp".
Could not find object file "/private/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/examples/designer/customwidgetplugin/.obj/debug-shared/customwidgetplugin.o" - no debug information available for "customwidgetplugin.cpp".
Could not find object file "/private/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/examples/designer/customwidgetplugin/.obj/debug-shared/moc_analogclock.o" - no debug information available for ".moc/debug-shared/moc_analogclock.cpp".
Could not find object file "/private/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/examples/designer/customwidgetplugin/.obj/debug-shared/moc_customwidgetplugin.o" - no debug information available for ".moc/debug-shared/moc_customwidgetplugin.cpp".
Could not find object file "/private/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/examples/designer/worldtimeclockplugin/.obj/debug-shared/worldtimeclock.o" - no debug information available for "worldtimeclock.cpp".
Could not find object file "/private/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/examples/designer/worldtimeclockplugin/.obj/debug-shared/worldtimeclockplugin.o" - no debug information available for "worldtimeclockplugin.cpp".
Could not find object file "/private/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/examples/designer/worldtimeclockplugin/.obj/debug-shared/moc_worldtimeclock.o" - no debug information available for ".moc/debug-shared/moc_worldtimeclock.cpp".
Could not find object file "/private/tmp/qt-stuff-6474/source/qt-everywhere-opensource-src-4.7.0/examples/designer/worldtimeclockplugin/.obj/debug-shared/moc_worldtimeclockplugin.o" - no debug information available for ".moc/debug-shared/moc_worldtimeclockplugin.cpp".
2011-04-04 17:05:25.579 vmfdebuger[6072:a0f] -[NSCFArray name]: unrecognized selector sent to instance 0x102ea6650
Qt has caught an exception thrown from an event handler. Throwing
exceptions from an event handler is not supported in Qt. You must
reimplement QApplication::notify() and catch all exceptions there.

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**wysota** · 4th April 2011, 23:53

It seems you have no debugging symbols for the libraries installed.

**Nivek** · 6th April 2011, 20:07

Hi sorry about the delay but I've finally been able to get back to this. I have the QtCore, QtGui, etc frameworks installed in /Library/Frameworks/. How to I get the symbols to load properly?

**wysota** · 6th April 2011, 21:09

Do you have the debugging symbols for those libraries? Did you build Qt in both release and debug mode?

**Nivek** · 6th April 2011, 21:40

Yes, I built Qt as frameworks, and the debug symbols are contained in the frameworks. I can't seem to change where it is looking for them from for example QtGui.framework/Versions/4/QtGui, where it is trying to find them, to /Library/Frameworks/QtGui.framework/Versions/4/QtGui where they are located.