Qt/QML application crashes when using webengine in debug mode

Multi tool use
Multi tool use


Qt/QML application crashes when using webengine in debug mode



When running one of the examples using webengine (quicknanobrowser for instance), the project runs in release mode, but I get a crash when trying to run in debug mode.


webengine



Here is the backtrace, I get within qtcreator.



Starting
D:QtExamplesQt-5.11.0webenginebuild-quicknanobrowser-Desktop_Qt_5_11_0_MSVC2017_64bit-Debugdebugquicknanobrowser.exe...



QML debugging is enabled. Only use this in a safe environment.



[16204:11860:0528/174814.316:WARNING:backend_impl.cc(1832)] Destroying
invalid entry.



[16204:11860:0528/174814.316:WARNING:backend_impl.cc(1832)] Destroying
invalid entry.



[16204:7912:0528/174814.361:FATAL:simple_watcher.cc(137)] Check
failed: task_runner_->RunsTasksInCurrentSequence().



Backtrace:



GetHandleVerifier [0x0000000182B7E3E5+502837]



GetHandleVerifier [0x0000000182B928F8+586056]



QWebEngineUrlSchemeHandler::_q_destroyedUrlSchemeHandler
[0x0000000182A85430+3552]



QtWebEngineCore::BrowserContextAdapter::isOffTheRecord
[0x0000000183BFB280+898992]



QtWebEngineCore::BrowserContextAdapter::isOffTheRecord
[0x0000000183BD9392+760002]



QtWebEngineCore::BrowserContextAdapter::isOffTheRecord
[0x0000000183BD7042+750962]



QtWebEngineCore::BrowserContextAdapter::isOffTheRecord
[0x0000000183BCA29A+698314]



QtWebEngineCore::BrowserContextAdapter::isOffTheRecord
[0x0000000183BC2384+665780]



QtWebEngineCore::JavaScriptDialogController::qt_static_metacall
[0x00000001801D21FC+69644]



QtWebEngineCore::JavaScriptDialogController::qt_static_metacall
[0x00000001801D2963+71539]



QtWebEngineCore::JavaScriptDialogController::qt_static_metacall
[0x00000001801D2946+71510]



QtWebEngineCore::JavaScriptDialogController::qt_static_metacall
[0x00000001801D1D03+68371]



QtWebEngineCore::FaviconManager::qt_static_metacall
[0x0000000181BBCBB3+2910355]



QtWebEngineCore::FaviconManager::qt_static_metacall
[0x0000000181BBE3B8+2916504]



QtWebEngineCore::FilePickerController::mode
[0x000000018340405F+7213039]



QtWebEngineCore::FilePickerController::mode
[0x0000000183404520+7214256]



QtWebEngineCore::FilePickerController::mode
[0x000000018340579D+7218989]



QWebEngineCookieStorePrivate::q_func [0x00000001862E102B+1833963]



IsSandboxedProcess [0x00000001856A4CB3+14681795]



QtWebEngineCore::UserScript::validUserScriptSchemes
[0x0000000183890905+1042949]



QtWebEngineCore::UserScript::validUserScriptSchemes
[0x0000000183893301+1053697]



base::RefCountedThreadSafe



::RefCountedThreadSafe



QtWebEngineCore::FilePickerController::mode
[0x000000018358BB96+8817446]



QtWebEngineCore::FilePickerController::mode
[0x000000018358D654+8824292]



QWebEngineCookieStorePrivate::q_func [0x00000001862E102B+1833963]



IsSandboxedProcess [0x00000001856A4CB3+14681795]



QtWebEngineCore::UserScript::validUserScriptSchemes
[0x0000000183890905+1042949]



QtWebEngineCore::UserScript::validUserScriptSchemes
[0x0000000183893301+1053697]



base::RefCountedThreadSafe



::RefCountedThreadSafe



QtWebEngineCore::FilePickerController::mode
[0x00000001833FEDDB+7191915]



QtWebEngineCore::FilePickerController::mode
[0x00000001833FF2FE+7193230]



QtWebEngineCore::FilePickerController::mode
[0x00000001833FE155+7188709]



QtWebEngineCore::FilePickerController::mode
[0x00000001833FFA57+7195111]



QtWebEngineCore::FilePickerController::mode
[0x00000001833FF6EE+7194238]



QtWebEngineCore::FilePickerController::mode
[0x0000000183378282+6640146]



QtWebEngineCore::FilePickerController::mode
[0x000000018342B12F+7372991]



QtWebEngineCore::FilePickerController::mode
[0x0000000183679172+9789698]



QtWebEngineCore::FilePickerController::mode
[0x000000018367BEFC+9801356]



QtWebEngineCore::FilePickerController::mode
[0x0000000183679ACF+9792095]



QWebEngineCookieStorePrivate::q_func [0x00000001862E102B+1833963]



IsSandboxedProcess [0x00000001856A4CB3+14681795]



QtWebEngineCore::UserScript::validUserScriptSchemes
[0x0000000183890905+1042949]



QtWebEngineCore::UserScript::validUserScriptSchemes
[0x0000000183893301+1053697]



QtWebEngineCore::PdfiumDocumentWrapperQt::pageCount
[0x0000000182A0073A+1516282]



QtWebEngineCore::FilePickerController::mode
[0x0000000183561C25+8645557]



QtWebEngineCore::FilePickerController::mode
[0x000000018356721B+8667563]



CertificateErrorController::overridable [0x0000000180CF922A+7620650]



IsSandboxedProcess [0x0000000184AF8476+2440838]



IsSandboxedProcess [0x0000000184AF8598+2441128]



IsSandboxedProcess [0x0000000184AF92B1+2444481]



base::RefCountedThreadSafe



::RefCountedThreadSafe



QtWebEngineCore::FilePickerController::mode
[0x0000000183662339+9695945]



QtWebEngineCore::FilePickerController::mode
[0x0000000183667484+9716756]



QtWebEngineCore::WebEngineSettings::setUnknownUrlSchemePolicy
[0x00000001815E7947+7732663]



base::RefCountedThreadSafe



::AddRef [0x0000000185839249+966089]



QtWebEngineCore::FilePickerController::mode
[0x0000000183594565+8852725]



QtWebEngineCore::FilePickerController::mode
[0x000000018359F1E1+8896881]



base::RefCountedThreadSafe



::RefCountedThreadSafe



QtWebEngineCore::UserScript::validUserScriptSchemes
[0x000000018387AC99+953753]



CertificateErrorController::overridable [0x0000000180CF922A+7620650]



IsSandboxedProcess [0x0000000184AF8476+2440838]



IsSandboxedProcess [0x0000000184AF8598+2441128]



The program has unexpectedly finished.



The process was ended forcefully.



D:/Qt/Examples/Qt-5.11.0/webengine/build-quicknanobrowser-Desktop_Qt_5_11_0_MSVC2017_64bit-Debug/debug/quicknanobrowser.exe
crashed.



Anyone has a clue of what is going on?





The Line 'QML debugging is enabled' says. when you release any code the Debugging must be disabled. Please do it and it should help.
– MarmiK
Jul 3 at 7:16





I get this crash in debug mode, release is ok. I try to turn off the "Enable QML debugging and profiling" and get the same crash, it doesn't work.
– Liang
Jul 4 at 3:16





Try enabling "safe environment" with debugging enabled.
– MarmiK
Jul 4 at 7:14





I can not find "safe environment" option in Qt Creator. Can you give me a screenshot? Thanks!
– Liang
Jul 4 at 9:38





Use this Source Link that will guide you better, safe environment extension need to be installed to create safe environment. Basically will safe guard the device on this this code will run.
– MarmiK
Jul 4 at 13:29










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