Application which developed by Qt Creator2.8 on MAC OS X exit unexpectly.

[holly.deng]

When I close myapp(tap the "Quit myapp(⌘Q)" button from tool bar), it always pop up the below error message. And every time it crashes in different thread.
Why this happened? Anyone encountered the same problem?

error message:
Process: myapp [6437]
Path: /Users/jerryrao/Desktop/myapp.app/Contents/MacOS/myapp
Identifier: com.yourcompany.myapp
Version: ??? (???)
Code Type: X86-64 (Native)
Parent Process: launchd [98]

Date/Time: 2013-07-25 17:48:55.566 +0800
OS Version: Mac OS X 10.6.8 (10K549)
Report Version: 6

Interval Since Last Report: 162019 sec
Crashes Since Last Report: 40
Per-App Interval Since Last Report: 67953 sec
Per-App Crashes Since Last Report: 33
Anonymous UUID: 7C4F1A93-C8EC-4926-8FAF-B981440077B6

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000080
Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0 com.yourcompany.myapp 0x000000010029d9e2 QSubThread::StopThread() + 12
1 com.yourcompany.myapp 0x000000010028e8e6 NavMySubscription::U_NavIsClosing() + 28
2 com.yourcompany.myapp 0x000000010029d703 NavMySubscriptionFrame::~NavMySubscriptionFrame() + 79
3 com.yourcompany.myapp 0x0000000100189156 U_Nav::~U_Nav() + 548
4 com.yourcompany.myapp 0x00000001001761e9 main + 2631
5 com.yourcompany.myapp 0x000000010014833c start + 52

[holly.deng]

I have solved the problem.Rewriting closeEvent and processing relavent tasks in it will help to improve this issue.