Details
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Bug
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Resolution: Done
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P2: Important
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4.7.0, 4.8.x
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None
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Qt 4.7.0, Windows XP, MSVC9, Qt Creator 2.0.1
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7388fcb83592a90aace054314e0c3e7e7a94fdae 44373d71dde16c4899377703e724d46d803ade9e
Description
Test case is included as an attachment buildable by qmake && make.
Build it, run it and close the appearing window and it crashes.
Here's the contents briefly described:
- Loop with two rounds containing this:
- Create QMainApplication
- Create QMainWindow
- Create QWebView and set it as QMainWindow's central widget
- Load URL to QWebView (e.g. http://www.google.com/)
- Show the QWebView
- Execute the QMainApplication
So after closing the window and destroying the objects on the
first loop it crashes. I know the Qt documentation says that
there is precisely one QApplication per program but does that
mean also that you can't have only one QApplication object
at a time but different ones consequently in a program (as
is the case in the test case)?
--- Stack trace from Qt Creator 2.0.1 with MSVC debugger: --- Stopped at qmutex.cpp:151 in thread 0. Exception at 0x6705e44b, code: 0xc0000005: read access violation at: 0xc, flags=0x0 Level Function File Line Address 0 QMutex::lock qmutex.cpp 151 0x6705e44b 1 QMutexLocker::QMutexLocker qmutex.h 103 0x6703b1cd 2 QNetworkConfigurationManagerPrivate::enablePolling qnetworkconfigmanager_p.cpp 502 0x640828e8 3 QNetworkConfigurationManager::QNetworkConfigurationManager qnetworkconfigmanager.cpp 216 0x6407cada 4 QNetworkAccessManager::createRequest qnetworkaccessmanager.cpp 966 0x64044a87 5 QNetworkAccessManager::get qnetworkaccessmanager.cpp 688 0x64043fec 6 WebCore::QNetworkReplyHandler::start QNetworkReplyHandler.cpp 442 0x109cef56 7 WebCore::QNetworkReplyHandler::QNetworkReplyHandler QNetworkReplyHandler.cpp 178 0x109cd45d 8 WebCore::ResourceHandle::start ResourceHandleQt.cpp 141 0x109cbaeb 9 WebCore::ResourceHandle::create ResourceHandle.cpp 64 0x1083d13c 10 WebCore::MainResourceLoader::loadNow MainResourceLoader.cpp 524 0x10748428 11 WebCore::MainResourceLoader::load MainResourceLoader.cpp 548 0x1074855f 12 WebCore::DocumentLoader::startLoadingMainResource DocumentLoader.cpp 727 0x107100c6 13 WebCore::FrameLoader::continueLoadAfterWillSubmitForm FrameLoader.cpp 3057 0x107244be 14 WebCore::FrameLoader::continueLoadAfterNavigationPolicy FrameLoader.cpp 3538 0x10725e11 15 WebCore::FrameLoader::callContinueLoadAfterNavigationPolicy FrameLoader.cpp 3469 0x10725b15 16 WebCore::PolicyCallback::call PolicyCallback.cpp 101 0x1074c170 17 WebCore::PolicyChecker::continueAfterNavigationPolicy PolicyChecker.cpp 161 0x1074cf1e 18 WebCore::FrameLoaderClientQt::callPolicyFunction FrameLoaderClientQt.cpp 193 0x109f9422 19 WebCore::FrameLoaderClientQt::dispatchDecidePolicyForNavigationAction FrameLoaderClientQt.cpp 1036 0x109fcd72 20 WebCore::PolicyChecker::checkNavigationPolicy PolicyChecker.cpp 89 0x1074ca1e 21 WebCore::FrameLoader::loadWithDocumentLoader FrameLoader.cpp 2104 0x107217f0 22 WebCore::FrameLoader::load FrameLoader.cpp 2057 0x10721464 23 WebCore::FrameLoader::load FrameLoader.cpp 1998 0x10720f6e 24 WebCore::FrameLoader::load FrameLoader.cpp 1984 0x10720d9b 25 QWebFrame::load qwebframe.cpp 952 0x10a0627f 26 QWebFrame::load qwebframe.cpp 894 0x10a05e2a 27 QWebView::load qwebview.cpp 433 0x10a229f1 28 main main.cpp 13 0x401160 29 WinMain qtmain_win.cpp 131 0x4023ca 30 __tmainCRTStartup crtexe.c 578 0x4018a8 31 WinMainCRTStartup crtexe.c 403 0x40160f 32 RegisterWaitForInputIdle kernel32 0 0x7c816fe7
Qt\4.7.0\src\corelib\thread\qmutex.cpp:
void QMutex::lock()
{
Qt::HANDLE self;
if (d->recursive) { // <---- debugger points here at level 0
self = QThread::currentThreadId();
...
Attachments
Issue Links
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- Closed
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