[Qt4-preview-feedback] Qt 4.5.0/Cocoa occasional crash/freeze with modal progress dialogs

[Martin Dyde]

Hello Trenton & co.,

We circulated a 64-bit/Cocoa OS X version of our application to our 
customers about three weeks ago, built with Qt 4.5.0, and there still 
seems to be a very occasional crash or freeze with progress dialogs or 
similar modal dialogs that call QApplication::processEvents().

I'm afraid I don't yet have a reliable way to reproduce it, but just 
wanted to pass on the crash trace below, in case it means anything 
useful to you.

---

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000020
Crashed Thread:  0

Thread 0 Crashed:
0   QtGui                             0x0000000101dfdf40 
qt_mac_nativeview_for(QWidget const*) + 0
1   com.apple.AppKit                  0x00007fff80d4a286 -[NSApplication 
sendEvent:] + 5089
2   com.apple.AppKit                  0x00007fff80eeb311 -[NSApplication 
_realDoModalLoop:peek:] + 326
3   com.apple.AppKit                  0x00007fff80fdff3e -[NSApplication 
runModalSession:] + 58
4   QtGui                             0x0000000101e16d7e 
QEventDispatcherMac::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) 
+ 942
5   QtCore                            0x00000001029c7324 
QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 68
6   QtCore                            0x00000001029c74a5 
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 165
7   QtGui                             0x00000001022bee98 QDialog::exec() 
+ 232
8   Hauptwerk                         0x0000000100cfb79b 
ComponentInstaller::RunInstaller(QString const&) + 1475

---

Thanks and best regards,
Martin.


Martin Dyde,
Milan Digital Audio LLC.
http://www.crumhorn-labs.com/
http://www.milandigitalaudio.com/