Qupzilla CRASH when download starts

[M4dGun]

Hi,
I'm using latest QupZilla version 1.4.4 on ArchLinux (kernel 3.10.9-1) with KDE 4.11.
QZ crash when I start any downloads on any web site, everytime.
Why??

I like QupZIlla but this bug makes me crazy... -_-
Please help me!!! :)
This is my last crash-log:

Time: ven set 6 22:20:14 2013
Qt version: 4.8.5 (compiled with 4.8.5)
QupZilla version: 1.4.4
WebKit version: 537.21

============== BACKTRACE ==============
#0: qupzilla() [0x402dac]
#1: /usr/lib/libc.so.6(+0x35450) [0x7f8885624450]
#2: /usr/lib/mozilla/plugins/libflashplayer.so(+0x5cce98) [0x7f8809d23e98]
#3: /usr/lib/mozilla/plugins/libflashplayer.so(+0x5d289a) [0x7f8809d2989a]
#4: /usr/lib/mozilla/plugins/libflashplayer.so(NP_Shutdown+0x9) [0x7f8809d24e29]
#5: /usr/lib/libQtWebKit.so.4(+0xb434e7) [0x7f8887b814e7]
#6: /usr/lib/libQtWebKit.so.4(+0xb44015) [0x7f8887b82015]
#7: /usr/lib/libQtWebKit.so.4(+0xb4244d) [0x7f8887b8044d]
#8: /usr/lib/libQtWebKit.so.4(+0xb43020) [0x7f8887b81020]
#9: /usr/lib/libQtWebKit.so.4(+0x4402dc) [0x7f888747e2dc]
#10: /usr/lib/libQtWebKit.so.4(+0x44004c) [0x7f888747e04c]
#11: /usr/lib/libQtWebKit.so.4(+0x9f1fb3) [0x7f8887a2ffb3]
#12: /usr/lib/libQtWebKit.so.4(+0x9ea325) [0x7f8887a28325]
#13: /usr/lib/libQtWebKit.so.4(+0xd3d8e2) [0x7f8887d7b8e2]
#14: /usr/lib/libQtWebKit.so.4(+0xd3b51f) [0x7f8887d7951f]
#15: /usr/lib/libQtWebKit.so.4(+0xd3bb17) [0x7f8887d79b17]
#16: /usr/lib/libQtWebKit.so.4(+0xd3bbf0) [0x7f8887d79bf0]
#17: /usr/lib/libQtWebKit.so.4(+0xd3be0b) [0x7f8887d79e0b]
#18: /usr/lib/libQtCore.so.4(_ZN11QMetaObject8activateEP7QObjectPKS_iPPv+0x2d8) [0x7f8886041b48]
#19: /usr/lib/libQtNetwork.so.4(+0x8002f) [0x7f888443a02f]
#20: /usr/lib/libQtNetwork.so.4(+0x6ea09) [0x7f8884428a09]
#21: /usr/lib/libQtNetwork.so.4(+0xee9f7) [0x7f88844a89f7]
#22: /usr/lib/libQtCore.so.4(_ZN7QObject5eventEP6QEvent+0x24e) [0x7f8886045efe]
#23: /usr/lib/libQtGui.so.4(_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent+0x8c) [0x7f888655d12c]
#24: /usr/lib/libQtGui.so.4(_ZN12QApplication6notifyEP7QObjectP6QEvent+0x270) [0x7f88865636f0]
#25: /usr/lib/libQtCore.so.4(_ZN16QCoreApplication14notifyInternalEP7QObjectP6QEvent+0x6d) [0x7f888602debd]
#26: /usr/lib/libQtCore.so.4(_ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData+0x1ef) [0x7f8886030f0f]
#27: /usr/lib/libQtCore.so.4(+0x1a8263) [0x7f888605b263]
#28: /usr/lib/libglib-2.0.so.0(g_main_context_dispatch+0x146) [0x7f888243fd96]
#29: /usr/lib/libglib-2.0.so.0(+0x480e8) [0x7f88824400e8]
#30: /usr/lib/libglib-2.0.so.0(g_main_context_iteration+0x2c) [0x7f888244018c]
#31: /usr/lib/libQtCore.so.4(_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE+0x65) [0x7f888605ab25]
#32: /usr/lib/libQtGui.so.4(+0x266266) [0x7f88865fa266]
#33: /usr/lib/libQtCore.so.4(_ZN10QEventLoop13processEventsE6QFlagsINS_17ProcessEventsFlagEE+0x2f) [0x7f888602cb1f]
#34: /usr/lib/libQtCore.so.4(_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE+0x175) [0x7f888602ce15]
#35: /usr/lib/libQtCore.so.4(_ZN16QCoreApplication4execEv+0x8b) [0x7f8886031f4b]
#36: qupzilla() [0x402833]
#37: /usr/lib/libc.so.6(__libc_start_main+0xf5) [0x7f8885610bc5]
#38: qupzilla() [0x402ad5]

[genodeftest]

I can't reproduce this. What are your settings in Preferences Downloads ?
I have:

1. Always download to /home/user/Downloads
2. ✔ close download manager when finished downloads
3. ✔ use native system dialog
4. ✘ use external download manager

Can you reproduce this while debugging qupzilla (see https://github.com/QupZilla/qupzilla/wiki/FAQ#how-will-i-be-able-to-debug-qupzilla-in-case-of-a-crash )?

[JHooverman]

If you take a look at the backtrace you will see, that libQupZilla.so.* is not involved. I assume, there might be rather a problem in/ with some other libraries. Unfortunately it is always quite difficult to find the root cause.

In order to exclude FlashPlayer you might try to uncheck

Preferences -> Browsing -> Allow Netscape Plugins

Downloading works for me.

Application version: 1.5.0 (a130c51)
Qt version: 4.8.5
WebKit version: 537.21
Build time: Sep 8 2013 13:23:55
Platform: Linux (openSUSE 12.2)

[nowrep]

@JHooverman is right. This is QtWebKit & Flash crash.