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QFileDialog::getOpenFileName causing program to crash

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #2

    Hi and welcome to devnet,

    Which version of Qt is it ?
    On which OS ?
    Silly test but what happens if you nuke the build folder and rebuild the application ?

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

    B 1 Reply Last reply
    0
    • SGaistS SGaist

      Hi and welcome to devnet,

      Which version of Qt is it ?
      On which OS ?
      Silly test but what happens if you nuke the build folder and rebuild the application ?

      B Offline
      B Offline
      BogdanPopa
      wrote on last edited by
      #3

      @SGaist Im using QT 6.4.2 on Windows 10. I also tried creating another project folder and copy-paste the entire project, and then run the new project. Same problem.

      jsulmJ 1 Reply Last reply
      0
      • B BogdanPopa

        @SGaist Im using QT 6.4.2 on Windows 10. I also tried creating another project folder and copy-paste the entire project, and then run the new project. Same problem.

        jsulmJ Online
        jsulmJ Online
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #4

        @BogdanPopa What about "Silly test but what happens if you nuke the build folder and rebuild the application ?"?

        https://forum.qt.io/topic/113070/qt-code-of-conduct

        B 1 Reply Last reply
        0
        • jsulmJ jsulm

          @BogdanPopa What about "Silly test but what happens if you nuke the build folder and rebuild the application ?"?

          B Offline
          B Offline
          BogdanPopa
          wrote on last edited by
          #5

          @jsulm You mean deleting the "CMakeLists.txt" file and then building the application?

          JonBJ 1 Reply Last reply
          0
          • B BogdanPopa

            @jsulm You mean deleting the "CMakeLists.txt" file and then building the application?

            JonBJ Online
            JonBJ Online
            JonB
            wrote on last edited by
            #6

            @BogdanPopa
            No, they mean delete the build output folder, for whichever debug/release you are building.

            B 1 Reply Last reply
            0
            • JonBJ JonB

              @BogdanPopa
              No, they mean delete the build output folder, for whichever debug/release you are building.

              B Offline
              B Offline
              BogdanPopa
              wrote on last edited by
              #7

              @JonB I tried this now. The same error occurs.

              1 Reply Last reply
              0
              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #8

                Can you show the backtrace of your crash ?

                Interested in AI ? www.idiap.ch
                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                B 1 Reply Last reply
                0
                • SGaistS SGaist

                  Can you show the backtrace of your crash ?

                  B Offline
                  B Offline
                  BogdanPopa
                  wrote on last edited by
                  #9

                  @SGaist

                  1 RaiseException 0x7ffb0837cd29
                  2 on_avast_dll_unload 0x7ffac8365310
                  3 ashShell!DllCanUnloadNow 0x7ffac82ec6d8
                  4 ?? 0x7ffac81d4419
                  5 ashShell!DllCanUnloadNow 0x7ffac81d8971
                  6 on_avast_dll_unload 0x7ffac83132be
                  7 ntdll!RtlActivateActivationContextUnsafeFast 0x7ffb0a949a1d
                  8 ntdll!LdrGetProcedureAddressEx 0x7ffb0a99c2f7
                  9 ntdll!LdrGetProcedureAddressEx 0x7ffb0a99c08a
                  10 ntdll!RtlSwitchedVVI 0x7ffb0a96d987
                  11 ntdll!RtlGetFullPathName_UstrEx 0x7ffb0a94fbae
                  12 ntdll!RtlDosPathNameToNtPathName_U 0x7ffb0a9473e4
                  13 ntdll!LdrLoadDll 0x7ffb0a946af4
                  14 ?? 0x7ffac8a3291c
                  15 LoadLibraryExW 0x7ffb083854c2
                  16 combase!WindowsPreallocateStringBuffer 0x7ffb09c76b4d
                  17 combase!WindowsPreallocateStringBuffer 0x7ffb09c76a96
                  18 combase!WindowsPreallocateStringBuffer 0x7ffb09c76868
                  19 combase!WindowsPreallocateStringBuffer 0x7ffb09c764aa
                  20 combase!SetErrorInfo 0x7ffb09c49660
                  21 combase!CoGetTreatAsClass 0x7ffb09cb5a6d
                  22 combase!CoGetTreatAsClass 0x7ffb09cb53e6
                  23 combase!StringFromGUID2 0x7ffb09c619e0
                  24 combase!CoGetTreatAsClass 0x7ffb09cb5bec
                  25 combase!CoDisableCallCancellation 0x7ffb09cf1e78
                  26 combase!CoRegisterMessageFilter 0x7ffb09cf6d80
                  27 combase!CoTaskMemRealloc 0x7ffb09cef2e1
                  28 combase!CoDisableCallCancellation 0x7ffb09cf20b0
                  29 combase!StringFromGUID2 0x7ffb09c619e0
                  30 combase!StringFromGUID2 0x7ffb09c5dc4f
                  31 combase!StringFromGUID2 0x7ffb09c619e0
                  32 combase!CoCreateInstance 0x7ffb09c4bd2a
                  33 combase!CoCreateInstance 0x7ffb09c4a7d0
                  34 combase!CoCreateInstance 0x7ffb09c4a52c
                  35 ?? 0x7ffac8a33c5a
                  36 SHEvaluateSystemCommandTemplate 0x7ffb089d9457
                  37 SHEvaluateSystemCommandTemplate 0x7ffb089e4870
                  38 SHEvaluateSystemCommandTemplate 0x7ffb089e46e6
                  39 SHELL32!OpenAs_RunDLLA 0x7ffb08a05cd0
                  40 SHELL32!OpenAs_RunDLLA 0x7ffb08a05785
                  41 SHEnableServiceObject 0x7ffb08a04b9d
                  42 SHELL32!SHCreateAssociationRegistration 0x7ffb08a2a3c3
                  43 SHELL32_AddToFrontIconTable 0x7ffb089b3e36
                  44 SHELL32_IconOverlayManagerInit 0x7ffb089b35dd
                  45 Windows.Storage!SHGetFolderPathAndSubDirW 0x7ffb06214711
                  46 Windows.Storage!SHTestTokenMembership 0x7ffb061ca187
                  47 Windows.Storage!SHTestTokenMembership 0x7ffb061ca367
                  48 EXPLORERFRAME!DllGetClassObject 0x7ffacc663581
                  49 EXPLORERFRAME!DllGetClassObject 0x7ffacc6264fb
                  50 EXPLORERFRAME!DllGetClassObject 0x7ffacc65b302
                  51 Windows.Storage!ILCloneFirst 0x7ffb061a481c
                  52 Windows.Storage!ILCloneFirst 0x7ffb061a4461
                  53 Windows.Storage!SHGetFolderPathAndSubDirW 0x7ffb06214ad4
                  54 SHCORE!DllCanUnloadNow 0x7ffb0a363106
                  55 ntdll!TpSetPoolStackInformation 0x7ffb0a99fcd3
                  56 ntdll!TpReleaseCleanupGroupMembers 0x7ffb0a9831aa
                  57 KERNEL32!BaseThreadInitThunk 0x7ffb096a7614
                  58 ntdll!RtlUserThreadStart 0x7ffb0a9826a1
                  59 ??

                  JonBJ 1 Reply Last reply
                  0
                  • B BogdanPopa

                    @SGaist

                    1 RaiseException 0x7ffb0837cd29
                    2 on_avast_dll_unload 0x7ffac8365310
                    3 ashShell!DllCanUnloadNow 0x7ffac82ec6d8
                    4 ?? 0x7ffac81d4419
                    5 ashShell!DllCanUnloadNow 0x7ffac81d8971
                    6 on_avast_dll_unload 0x7ffac83132be
                    7 ntdll!RtlActivateActivationContextUnsafeFast 0x7ffb0a949a1d
                    8 ntdll!LdrGetProcedureAddressEx 0x7ffb0a99c2f7
                    9 ntdll!LdrGetProcedureAddressEx 0x7ffb0a99c08a
                    10 ntdll!RtlSwitchedVVI 0x7ffb0a96d987
                    11 ntdll!RtlGetFullPathName_UstrEx 0x7ffb0a94fbae
                    12 ntdll!RtlDosPathNameToNtPathName_U 0x7ffb0a9473e4
                    13 ntdll!LdrLoadDll 0x7ffb0a946af4
                    14 ?? 0x7ffac8a3291c
                    15 LoadLibraryExW 0x7ffb083854c2
                    16 combase!WindowsPreallocateStringBuffer 0x7ffb09c76b4d
                    17 combase!WindowsPreallocateStringBuffer 0x7ffb09c76a96
                    18 combase!WindowsPreallocateStringBuffer 0x7ffb09c76868
                    19 combase!WindowsPreallocateStringBuffer 0x7ffb09c764aa
                    20 combase!SetErrorInfo 0x7ffb09c49660
                    21 combase!CoGetTreatAsClass 0x7ffb09cb5a6d
                    22 combase!CoGetTreatAsClass 0x7ffb09cb53e6
                    23 combase!StringFromGUID2 0x7ffb09c619e0
                    24 combase!CoGetTreatAsClass 0x7ffb09cb5bec
                    25 combase!CoDisableCallCancellation 0x7ffb09cf1e78
                    26 combase!CoRegisterMessageFilter 0x7ffb09cf6d80
                    27 combase!CoTaskMemRealloc 0x7ffb09cef2e1
                    28 combase!CoDisableCallCancellation 0x7ffb09cf20b0
                    29 combase!StringFromGUID2 0x7ffb09c619e0
                    30 combase!StringFromGUID2 0x7ffb09c5dc4f
                    31 combase!StringFromGUID2 0x7ffb09c619e0
                    32 combase!CoCreateInstance 0x7ffb09c4bd2a
                    33 combase!CoCreateInstance 0x7ffb09c4a7d0
                    34 combase!CoCreateInstance 0x7ffb09c4a52c
                    35 ?? 0x7ffac8a33c5a
                    36 SHEvaluateSystemCommandTemplate 0x7ffb089d9457
                    37 SHEvaluateSystemCommandTemplate 0x7ffb089e4870
                    38 SHEvaluateSystemCommandTemplate 0x7ffb089e46e6
                    39 SHELL32!OpenAs_RunDLLA 0x7ffb08a05cd0
                    40 SHELL32!OpenAs_RunDLLA 0x7ffb08a05785
                    41 SHEnableServiceObject 0x7ffb08a04b9d
                    42 SHELL32!SHCreateAssociationRegistration 0x7ffb08a2a3c3
                    43 SHELL32_AddToFrontIconTable 0x7ffb089b3e36
                    44 SHELL32_IconOverlayManagerInit 0x7ffb089b35dd
                    45 Windows.Storage!SHGetFolderPathAndSubDirW 0x7ffb06214711
                    46 Windows.Storage!SHTestTokenMembership 0x7ffb061ca187
                    47 Windows.Storage!SHTestTokenMembership 0x7ffb061ca367
                    48 EXPLORERFRAME!DllGetClassObject 0x7ffacc663581
                    49 EXPLORERFRAME!DllGetClassObject 0x7ffacc6264fb
                    50 EXPLORERFRAME!DllGetClassObject 0x7ffacc65b302
                    51 Windows.Storage!ILCloneFirst 0x7ffb061a481c
                    52 Windows.Storage!ILCloneFirst 0x7ffb061a4461
                    53 Windows.Storage!SHGetFolderPathAndSubDirW 0x7ffb06214ad4
                    54 SHCORE!DllCanUnloadNow 0x7ffb0a363106
                    55 ntdll!TpSetPoolStackInformation 0x7ffb0a99fcd3
                    56 ntdll!TpReleaseCleanupGroupMembers 0x7ffb0a9831aa
                    57 KERNEL32!BaseThreadInitThunk 0x7ffb096a7614
                    58 ntdll!RtlUserThreadStart 0x7ffb0a9826a1
                    59 ??

                    JonBJ Online
                    JonBJ Online
                    JonB
                    wrote on last edited by
                    #10

                    @BogdanPopa said in QFileDialog::getOpenFileName causing program to crash:

                    2 on_avast_dll_unload 0x7ffac8365310

                    Try disabling your Avast virus protector and see if it goes away?

                    B 1 Reply Last reply
                    2
                    • JonBJ JonB

                      @BogdanPopa said in QFileDialog::getOpenFileName causing program to crash:

                      2 on_avast_dll_unload 0x7ffac8365310

                      Try disabling your Avast virus protector and see if it goes away?

                      B Offline
                      B Offline
                      BogdanPopa
                      wrote on last edited by
                      #11

                      @JonB I have also tried this and still no result

                      JonBJ 1 Reply Last reply
                      0
                      • B BogdanPopa

                        @JonB I have also tried this and still no result

                        JonBJ Online
                        JonBJ Online
                        JonB
                        wrote on last edited by
                        #12

                        @BogdanPopa
                        Then I would expect you to be able to post a stack trace which does not show it dying in on_avast_dll_unload?

                        C 1 Reply Last reply
                        2
                        • JonBJ JonB

                          @BogdanPopa
                          Then I would expect you to be able to post a stack trace which does not show it dying in on_avast_dll_unload?

                          C Offline
                          C Offline
                          crackysk
                          wrote on last edited by
                          #13

                          I'm having similar issue as @BogdanPopa mentioned above.
                          Using QFileDialog::getSaveFileName instead of Open, but same concept...
                          Also, initial backtrace looked similar and contained avast detail, but managed to get past it and get a complete backtrace that has more sense...

                          1  ntdll!RtlCompareMemoryUlong                                                                   0x7ff8dab71aa0 
                          2  ntdll!RtlAllocateHeap                                                                         0x7ff8daafdd00 
                          3  ntdll!RtlAllocateHeap                                                                         0x7ff8daafb44d 
                          4  ntdll!RtlRegisterSecureMemoryCacheCallback                                                    0x7ff8dabc8c38 
                          5  ntdll!RtlAllocateHeap                                                                         0x7ff8daafd255 
                          6  ntdll!RtlAllocateHeap                                                                         0x7ff8daafb44d 
                          7  Windows.Storage!CFreeThreadedItemContainer_CreateInstance                                     0x7ff8d635ba26 
                          8  Windows.Storage!CFreeThreadedItemContainer_CreateInstance                                     0x7ff8d635b4be 
                          9  Windows.Storage!CCachedShellItem_CreateInstance                                               0x7ff8d635a3d2 
                          10 Windows.Storage!ILFindLastID                                                                  0x7ff8d636fc65 
                          11 Windows.Storage!SHCreateShellItemArrayFromIDLists                                             0x7ff8d640323f 
                          12 Windows.Storage!SHChangeNotification_Lock                                                     0x7ff8d6414537 
                          13 EXPLORERFRAME!DllGetClassObject                                                               0x7ff8a4a08a46 
                          14 EXPLORERFRAME!DllCanUnloadNow                                                                 0x7ff8a4a7d52a 
                          15 ??                                                                                            0x7ff8a4a01603 
                          16 ??                                                                                            0x7ff8a49ffa15 
                          17 EXPLORERFRAME!DllGetClassObject                                                               0x7ff8a4a3d680 
                          18 ??                                                                                            0x7ff8a49f873d 
                          19 ??                                                                                            0x7ff8a49f8551 
                          20 DefSubclassProc                                                                               0x7ff8bc959aba 
                          21 DSA_Create                                                                                    0x7ff8bc9598b7 
                          22 USER32!CallWindowProcW                                                                        0x7ff8d979e7e8 
                          23 USER32!DispatchMessageW                                                                       0x7ff8d979e229 
                          24 USER32!IsDialogMessageW                                                                       0x7ff8d979bfe0 
                          25 USER32!DialogBoxIndirectParamAorW                                                             0x7ff8d97bd8f6 
                          26 USER32!DialogBoxIndirectParamAorW                                                             0x7ff8d97bd5a1 
                          27 USER32!DialogBoxIndirectParamAorW                                                             0x7ff8d97bd452 
                          28 USER32!DialogBoxIndirectParamW                                                                0x7ff8d97bd3e8 
                          29 DllCanUnloadNow                                                                               0x7ff8d8c4617e 
                          30 GetFileTitleW                                                                                 0x7ff8d8c23064 
                          31 QWindowsNativeFileDialogBase::doExec                      qwindowsdialoghelpers.cpp      962  0x1e8480d9     
                          32 QWindowsNativeDialogBase::exec                            qwindowsdialoghelpers.cpp      183  0x1e937a97     
                          33 QWindowsDialogHelperBase<QPlatformFileDialogHelper>::exec qwindowsdialoghelpers.cpp      394  0x1e937a97     
                          34 QDialog::exec                                             qdialog.cpp                    553  0x67e6c699     
                          35 QFileDialog::getSaveFileUrl                               qfiledialog.cpp                2434 0x67e7efa6     
                          36 QFileDialog::getSaveFileName                              qfiledialog.cpp                2381 0x67e7f16b     
                          37 MainWindow::getDestination                                mainwindow.cpp                 288  0x4048ef       
                          38 MainWindow::qt_static_metacall                            moc_mainwindow.cpp             100  0x407be7       
                          39 QMetaObject::activate                                     qobject.cpp                    3778 0x1480c86      
                          40 QMetaObject::activate                                     qobject.cpp                    3631 0x1480fa4      
                          41 QAbstractButton::clicked                                  moc_qabstractbutton.cpp        312  0x67d70117     
                          42 QAbstractButtonPrivate::emitClicked                       qabstractbutton.cpp            414  0x67d70332     
                          43 QAbstractButtonPrivate::click                             qabstractbutton.cpp            407  0x67d718d0     
                          44 QAbstractButton::mouseReleaseEvent                        qabstractbutton.cpp            1011 0x67d71b71     
                          45 QWidget::event                                            qwidget.cpp                    8888 0x67cc9f42     
                          46 QAbstractButton::event                                    qabstractbutton.cpp            968  0x67d72d2c     
                          47 QPushButton::event                                        qpushbutton.cpp                684  0x67e013ec     
                          48 QApplicationPrivate::notify_helper                        qapplication.cpp               3752 0x67c8818e     
                          49 QApplication::notify                                      qapplication.cpp               3213 0x67c8f532     
                          50 QCoreApplication::notifyInternal2                         qcoreapplication.cpp           1061 0x14570a6      
                          51 QCoreApplication::sendSpontaneousEvent                    qcoreapplication.cpp           1463 0x14572ec      
                          52 QApplicationPrivate::sendMouseEvent                       qapplication.cpp               2699 0x67c8e8d6     
                          53 QWidgetWindow::handleMouseEvent                           qwidgetwindow.cpp              661  0x67cdf5f2     
                          54 QWidgetWindow::event                                      qwidgetwindow.cpp              281  0x67ce1a69     
                          55 QApplicationPrivate::notify_helper                        qapplication.cpp               3752 0x67c8818e     
                          56 QApplication::notify                                      qapplication.cpp               3109 0x67c8f253     
                          57 QCoreApplication::notifyInternal2                         qcoreapplication.cpp           1061 0x14570a6      
                          58 QCoreApplication::sendSpontaneousEvent                    qcoreapplication.cpp           1463 0x14572ec      
                          59 QGuiApplicationPrivate::processMouseEvent                 qguiapplication.cpp            2102 0xb31ed65      
                          60 QGuiApplicationPrivate::processWindowSystemEvent          qguiapplication.cpp            1837 0xb3201da      
                          61 QWindowSystemInterface::sendWindowSystemEvents            qwindowsysteminterface.cpp     1068 0xb303959      
                          62 QWindowsGuiEventDispatcher::sendPostedEvents              qwindowsguieventdispatcher.cpp 82   0x1e886ff9     
                          63 qt_internal_proc                                          qeventdispatcher_win.cpp       245  0x14abb5f      
                          64 USER32!CallWindowProcW                                                                        0x7ff8d979e7e8 
                          65 USER32!DispatchMessageW                                                                       0x7ff8d979e229 
                          66 QEventDispatcherWin32::processEvents                      qeventdispatcher_win.cpp       639  0x14ab2b9      
                          67 QWindowsGuiEventDispatcher::processEvents                 qwindowsguieventdispatcher.cpp 74   0x1e886fd7     
                          68 QEventLoop::processEvents                                 qeventloop.cpp                 138  0x14557c7      
                          69 QEventLoop::exec                                          qeventloop.cpp                 225  0x1455be5      
                          70 QCoreApplication::exec                                    qcoreapplication.cpp           1364 0x145e86e      
                          71 QGuiApplication::exec                                     qguiapplication.cpp            1779 0xb315d9d      
                          72 QApplication::exec                                        qapplication.cpp               2909 0x67c88070     
                          73 qMain                                                     main.cpp                       10   0x4015c3       
                          74 WinMain                                                   qtmain_win.cpp                 104  0x409cd2       
                          75 __tmainCRTStartup                                                                             0x4013c7       
                          76 WinMainCRTStartup                                                                             0x4014cb
                          

                          Sorry if formatting of backtrace is not ideal...

                          Also, maybe relevant note, this issue happened on multiple machines (a friend of mine is using application that I provided via installer and reported me an issue and it fails in same manner on both of our machines).
                          Since application has been working for years (3 more precisely) before this without any issues, my guess would be that some kind of Windows (also using Win10) update messed something up, but can't be sure about it.

                          I'm currently trying to use newer version of Qt (one I was using is fairly old, 5.12.0) hoping that one with more recent date would include some kind of fix for this, but according to this problem report I don't feel so confident about it. :)

                          Posting this in case it helps someone else.

                          JonBJ 1 Reply Last reply
                          0
                          • C crackysk

                            I'm having similar issue as @BogdanPopa mentioned above.
                            Using QFileDialog::getSaveFileName instead of Open, but same concept...
                            Also, initial backtrace looked similar and contained avast detail, but managed to get past it and get a complete backtrace that has more sense...

                            1  ntdll!RtlCompareMemoryUlong                                                                   0x7ff8dab71aa0 
                            2  ntdll!RtlAllocateHeap                                                                         0x7ff8daafdd00 
                            3  ntdll!RtlAllocateHeap                                                                         0x7ff8daafb44d 
                            4  ntdll!RtlRegisterSecureMemoryCacheCallback                                                    0x7ff8dabc8c38 
                            5  ntdll!RtlAllocateHeap                                                                         0x7ff8daafd255 
                            6  ntdll!RtlAllocateHeap                                                                         0x7ff8daafb44d 
                            7  Windows.Storage!CFreeThreadedItemContainer_CreateInstance                                     0x7ff8d635ba26 
                            8  Windows.Storage!CFreeThreadedItemContainer_CreateInstance                                     0x7ff8d635b4be 
                            9  Windows.Storage!CCachedShellItem_CreateInstance                                               0x7ff8d635a3d2 
                            10 Windows.Storage!ILFindLastID                                                                  0x7ff8d636fc65 
                            11 Windows.Storage!SHCreateShellItemArrayFromIDLists                                             0x7ff8d640323f 
                            12 Windows.Storage!SHChangeNotification_Lock                                                     0x7ff8d6414537 
                            13 EXPLORERFRAME!DllGetClassObject                                                               0x7ff8a4a08a46 
                            14 EXPLORERFRAME!DllCanUnloadNow                                                                 0x7ff8a4a7d52a 
                            15 ??                                                                                            0x7ff8a4a01603 
                            16 ??                                                                                            0x7ff8a49ffa15 
                            17 EXPLORERFRAME!DllGetClassObject                                                               0x7ff8a4a3d680 
                            18 ??                                                                                            0x7ff8a49f873d 
                            19 ??                                                                                            0x7ff8a49f8551 
                            20 DefSubclassProc                                                                               0x7ff8bc959aba 
                            21 DSA_Create                                                                                    0x7ff8bc9598b7 
                            22 USER32!CallWindowProcW                                                                        0x7ff8d979e7e8 
                            23 USER32!DispatchMessageW                                                                       0x7ff8d979e229 
                            24 USER32!IsDialogMessageW                                                                       0x7ff8d979bfe0 
                            25 USER32!DialogBoxIndirectParamAorW                                                             0x7ff8d97bd8f6 
                            26 USER32!DialogBoxIndirectParamAorW                                                             0x7ff8d97bd5a1 
                            27 USER32!DialogBoxIndirectParamAorW                                                             0x7ff8d97bd452 
                            28 USER32!DialogBoxIndirectParamW                                                                0x7ff8d97bd3e8 
                            29 DllCanUnloadNow                                                                               0x7ff8d8c4617e 
                            30 GetFileTitleW                                                                                 0x7ff8d8c23064 
                            31 QWindowsNativeFileDialogBase::doExec                      qwindowsdialoghelpers.cpp      962  0x1e8480d9     
                            32 QWindowsNativeDialogBase::exec                            qwindowsdialoghelpers.cpp      183  0x1e937a97     
                            33 QWindowsDialogHelperBase<QPlatformFileDialogHelper>::exec qwindowsdialoghelpers.cpp      394  0x1e937a97     
                            34 QDialog::exec                                             qdialog.cpp                    553  0x67e6c699     
                            35 QFileDialog::getSaveFileUrl                               qfiledialog.cpp                2434 0x67e7efa6     
                            36 QFileDialog::getSaveFileName                              qfiledialog.cpp                2381 0x67e7f16b     
                            37 MainWindow::getDestination                                mainwindow.cpp                 288  0x4048ef       
                            38 MainWindow::qt_static_metacall                            moc_mainwindow.cpp             100  0x407be7       
                            39 QMetaObject::activate                                     qobject.cpp                    3778 0x1480c86      
                            40 QMetaObject::activate                                     qobject.cpp                    3631 0x1480fa4      
                            41 QAbstractButton::clicked                                  moc_qabstractbutton.cpp        312  0x67d70117     
                            42 QAbstractButtonPrivate::emitClicked                       qabstractbutton.cpp            414  0x67d70332     
                            43 QAbstractButtonPrivate::click                             qabstractbutton.cpp            407  0x67d718d0     
                            44 QAbstractButton::mouseReleaseEvent                        qabstractbutton.cpp            1011 0x67d71b71     
                            45 QWidget::event                                            qwidget.cpp                    8888 0x67cc9f42     
                            46 QAbstractButton::event                                    qabstractbutton.cpp            968  0x67d72d2c     
                            47 QPushButton::event                                        qpushbutton.cpp                684  0x67e013ec     
                            48 QApplicationPrivate::notify_helper                        qapplication.cpp               3752 0x67c8818e     
                            49 QApplication::notify                                      qapplication.cpp               3213 0x67c8f532     
                            50 QCoreApplication::notifyInternal2                         qcoreapplication.cpp           1061 0x14570a6      
                            51 QCoreApplication::sendSpontaneousEvent                    qcoreapplication.cpp           1463 0x14572ec      
                            52 QApplicationPrivate::sendMouseEvent                       qapplication.cpp               2699 0x67c8e8d6     
                            53 QWidgetWindow::handleMouseEvent                           qwidgetwindow.cpp              661  0x67cdf5f2     
                            54 QWidgetWindow::event                                      qwidgetwindow.cpp              281  0x67ce1a69     
                            55 QApplicationPrivate::notify_helper                        qapplication.cpp               3752 0x67c8818e     
                            56 QApplication::notify                                      qapplication.cpp               3109 0x67c8f253     
                            57 QCoreApplication::notifyInternal2                         qcoreapplication.cpp           1061 0x14570a6      
                            58 QCoreApplication::sendSpontaneousEvent                    qcoreapplication.cpp           1463 0x14572ec      
                            59 QGuiApplicationPrivate::processMouseEvent                 qguiapplication.cpp            2102 0xb31ed65      
                            60 QGuiApplicationPrivate::processWindowSystemEvent          qguiapplication.cpp            1837 0xb3201da      
                            61 QWindowSystemInterface::sendWindowSystemEvents            qwindowsysteminterface.cpp     1068 0xb303959      
                            62 QWindowsGuiEventDispatcher::sendPostedEvents              qwindowsguieventdispatcher.cpp 82   0x1e886ff9     
                            63 qt_internal_proc                                          qeventdispatcher_win.cpp       245  0x14abb5f      
                            64 USER32!CallWindowProcW                                                                        0x7ff8d979e7e8 
                            65 USER32!DispatchMessageW                                                                       0x7ff8d979e229 
                            66 QEventDispatcherWin32::processEvents                      qeventdispatcher_win.cpp       639  0x14ab2b9      
                            67 QWindowsGuiEventDispatcher::processEvents                 qwindowsguieventdispatcher.cpp 74   0x1e886fd7     
                            68 QEventLoop::processEvents                                 qeventloop.cpp                 138  0x14557c7      
                            69 QEventLoop::exec                                          qeventloop.cpp                 225  0x1455be5      
                            70 QCoreApplication::exec                                    qcoreapplication.cpp           1364 0x145e86e      
                            71 QGuiApplication::exec                                     qguiapplication.cpp            1779 0xb315d9d      
                            72 QApplication::exec                                        qapplication.cpp               2909 0x67c88070     
                            73 qMain                                                     main.cpp                       10   0x4015c3       
                            74 WinMain                                                   qtmain_win.cpp                 104  0x409cd2       
                            75 __tmainCRTStartup                                                                             0x4013c7       
                            76 WinMainCRTStartup                                                                             0x4014cb
                            

                            Sorry if formatting of backtrace is not ideal...

                            Also, maybe relevant note, this issue happened on multiple machines (a friend of mine is using application that I provided via installer and reported me an issue and it fails in same manner on both of our machines).
                            Since application has been working for years (3 more precisely) before this without any issues, my guess would be that some kind of Windows (also using Win10) update messed something up, but can't be sure about it.

                            I'm currently trying to use newer version of Qt (one I was using is fairly old, 5.12.0) hoping that one with more recent date would include some kind of fix for this, but according to this problem report I don't feel so confident about it. :)

                            Posting this in case it helps someone else.

                            JonBJ Online
                            JonBJ Online
                            JonB
                            wrote on last edited by
                            #14

                            @crackysk said in QFileDialog::getOpenFileName causing program to crash:

                            Since application has been working for years (3 more precisely) before this without any issues, my guess would be that some kind of Windows (also using Win10) update messed something up, but can't be sure about it.

                            It is highly likely this is the case, sadly. I don't know what you can do about it (sometimes it's possible the next patch/update corrects an issue), but you might verify:

                            • I think it's clear the error comes when using the native Windows Save File dialog. Try passing QFileDialog::DontUseNativeDialog? But I'm not sure that works with getSaveFileName(), you may also have to try...
                            • ... Use a QFileDialog instance and setAcceptMode(QFileDialog::AcceptSave) to try your own code instead of the inbuilt static QFileDialog::getSaveFileName().

                            At least you will know what is required to reproduce the issue.

                            C 1 Reply Last reply
                            0
                            • JonBJ JonB

                              @crackysk said in QFileDialog::getOpenFileName causing program to crash:

                              Since application has been working for years (3 more precisely) before this without any issues, my guess would be that some kind of Windows (also using Win10) update messed something up, but can't be sure about it.

                              It is highly likely this is the case, sadly. I don't know what you can do about it (sometimes it's possible the next patch/update corrects an issue), but you might verify:

                              • I think it's clear the error comes when using the native Windows Save File dialog. Try passing QFileDialog::DontUseNativeDialog? But I'm not sure that works with getSaveFileName(), you may also have to try...
                              • ... Use a QFileDialog instance and setAcceptMode(QFileDialog::AcceptSave) to try your own code instead of the inbuilt static QFileDialog::getSaveFileName().

                              At least you will know what is required to reproduce the issue.

                              C Offline
                              C Offline
                              crackysk
                              wrote on last edited by
                              #15

                              @JonB
                              I've tried first option before posting yesterday, but forgot to mention it (knew I would forget something).
                              Today I tried the approach with using QFileDialog instance and still have same issue.

                              One interesting thing is that with QFileDialog::DontUseNativeDialog set to false application works "slightly better". Let me try to elaborate:

                              • When set to false, Windows dialog opens fully, shows a content of starting location folder, but then freezes and runs send problem report mechanism
                              • When set to true, something I believe should be Qt dialog opens, but dialog is fully white without any useful information and instantly runs send problem report mechanism

                              Will try to play further with it and see if I can make it work somehow.
                              Thank you for your replies and time.

                              1 Reply Last reply
                              0
                              • L Offline
                                L Offline
                                LaCucaracha
                                wrote on last edited by
                                #16

                                I've had the same issue in the last few days and managed to get around it.

                                I've had the same backtrace as shown above. On an app that worked for years. Qt 5.9 and now 5.15. Windows 10.

                                I don't use a QFileDialog but a QFileSystemModel set into a QTreeView.
                                When there is nothing to display, there is no crash (TreeView hidden, Model not set or Rootpath and Filters set to display an empty location).

                                My solution was to remove the icons from the display by overriding the function data() of QFileSystemModel to ignore the Qt::DecorationRole :

                                QVariant MyCustomFileModel::data(const QModelIndex& index, int role) const
                                {
                                    if (role == Qt::DecorationRole)
                                        return QVariant();
                                    else
                                        return QFileSystemModel::data(index, role);
                                }
                                

                                No icons. But it works.

                                Digging further, i made my own QFileIconProvider to give to the model.
                                The function icon is the issue.

                                QIcon QFileIconProvider::icon(const QFileInfo &info) const
                                

                                If i override it to return QIcon() it works fine, with icons. They might be different from what they were before and there might be some missing ones but i'm not sure. Probably has to do with the style of the application. (No custom style applied here)

                                For the next step, looking into QFileIconProviderPrivate, QGuiApplicationPrivate and QPlatformTheme might be a bit too much for my skills.

                                Also, the options QFileIconProvider::DontUseCustomDirectoryIcons and all of the QFileSystemModel options (DontWatchForChanges, DontResolveSymlinks, DontUseCustomDirectoryIcons) do not change anything.

                                C 1 Reply Last reply
                                1
                                • L LaCucaracha

                                  I've had the same issue in the last few days and managed to get around it.

                                  I've had the same backtrace as shown above. On an app that worked for years. Qt 5.9 and now 5.15. Windows 10.

                                  I don't use a QFileDialog but a QFileSystemModel set into a QTreeView.
                                  When there is nothing to display, there is no crash (TreeView hidden, Model not set or Rootpath and Filters set to display an empty location).

                                  My solution was to remove the icons from the display by overriding the function data() of QFileSystemModel to ignore the Qt::DecorationRole :

                                  QVariant MyCustomFileModel::data(const QModelIndex& index, int role) const
                                  {
                                      if (role == Qt::DecorationRole)
                                          return QVariant();
                                      else
                                          return QFileSystemModel::data(index, role);
                                  }
                                  

                                  No icons. But it works.

                                  Digging further, i made my own QFileIconProvider to give to the model.
                                  The function icon is the issue.

                                  QIcon QFileIconProvider::icon(const QFileInfo &info) const
                                  

                                  If i override it to return QIcon() it works fine, with icons. They might be different from what they were before and there might be some missing ones but i'm not sure. Probably has to do with the style of the application. (No custom style applied here)

                                  For the next step, looking into QFileIconProviderPrivate, QGuiApplicationPrivate and QPlatformTheme might be a bit too much for my skills.

                                  Also, the options QFileIconProvider::DontUseCustomDirectoryIcons and all of the QFileSystemModel options (DontWatchForChanges, DontResolveSymlinks, DontUseCustomDirectoryIcons) do not change anything.

                                  C Offline
                                  C Offline
                                  crackysk
                                  wrote on last edited by
                                  #17

                                  @LaCucaracha

                                  Thank you for reply. I even tried QFileIconProvider::DontUseCustomDirectoryIcons at some point, but didn't cross my mind that's not doing anything useful.

                                  I tried providing icon provider directly to static QFileDialog for save/open file that I was using, but it made no difference. Also, creating custom FileIconProvider and providing it to instance of QFileDialog created in app made no difference (also creating custom QFileDialog class).
                                  So, I basically moved to same thing as you did. I've written my own dialog that's doing same thing as static one I was using before.
                                  Now, I have treeView and listView next to each other, both of them provided with different QFileSystemModel (different when it comes to filter) and provided custom QFileIconProvider class that has icon() overridden. And really, crashes are gone!

                                  Honestly, I don't even mind having same file icon for each file type. For purposes I need it for, this is more than enough. But, if someone needs it, probably can even do similar thing like you did for a role and look for a specific QFileInfo that makes a mess and for all others use just default constructor for QIcon as you did.

                                  All that's left to do is handling cosmetics in order to make this new QDialog as close as possible to the one.

                                  1 Reply Last reply
                                  0
                                  • V Offline
                                    V Offline
                                    Vsevolod7
                                    wrote on last edited by
                                    #18

                                    Same problem.

                                    1 Reply Last reply
                                    0
                                    • ? Offline
                                      ? Offline
                                      A Former User
                                      wrote on last edited by
                                      #19

                                      I copy your codes and run it on win11 successfully. I used Qt5.13 and the compiler 'MingGW 64bit'. Add I tried the compiler 'MSVC2015', it is all right too. I think our developing environment are similar to each other.

                                      1 Reply Last reply
                                      0
                                      • A Offline
                                        A Offline
                                        az1699
                                        wrote on last edited by az1699
                                        #20

                                        Same issue here. I've a test application made few months ago that always worked. I fixed by working around using DontUseNativeDialog.

                                        If I run the same application, same build, on windows sand box it works perfectlly. Dont know why, windows sand box should have the same windows system update as my system

                                        1 Reply Last reply
                                        0
                                        • A Offline
                                          A Offline
                                          az1699
                                          wrote on last edited by
                                          #21

                                          I also tried this, don't why but after istancing QFileDialog with QFileDialog::DontUseNativeDialog I can start using QFileDialog in the previous way. I tested this simple example and works.

                                              static bool first_run = true;
                                              if (first_run) {
                                                  CmdOpenFile(QFileDialog::getOpenFileName(0, "Open some file", QString(), QObject::tr("All files (*.*)"), nullptr, QFileDialog::DontUseNativeDialog));
                                                  first_run = false;
                                              } else {
                                                  CmdOpenFile(QFileDialog::getOpenFileName(0, "Open some file", QString(), QObject::tr("All files (*.*)")));
                                              }
                                          
                                          1 Reply Last reply
                                          0

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