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Code running in 5.12, but not in 5.15 or higher



  • Hello

    I generate code in Qt Creator 4.14.2
    My code did run in all older Versions up to 5.12.4
    But when I use it in 5.15.2 or 6.0.1, it does compile but crashes with the following message:

    ---------------------------
    Signal erhalten
    ---------------------------
    <p>Der Prozess wurde wegen eines Signals vom Betriebssystem angehalten.<p><table><tr><td>Name des Signals : </td><td>SIGSEGV</td></tr><tr><td>Bedeutung : </td><td>Segmentation fault</td></tr></table>
    ---------------------------
    OK   
    ---------------------------
    

    It crashes in the line

    ui->setupUi(this);
    

    In mainwindow.cpp
    What can i do to avoid this?

    Thanks,

    Thomas


  • Lifetime Qt Champion

    @Thomas-63 said in Code running in 5.12, but not in 5.15 or higher:

    What can i do to avoid this?

    Please post the stack trace after crash.

    Also, did you completely rebuild your project after switching to other Qt version?



  • Is this the stack trace?

    0x4014b0                  48 83 ec 28                    sub    $0x28,%rsp
    0x4014b4  <+    4>        48 8b 05 05 af 53 00           mov    0x53af05(%rip),%rax        # 0x93c3c0 <.refptr.mingw_app_type>
    0x4014bb  <+   11>        c7 00 01 00 00 00              movl   $0x1,(%rax)
    0x4014c1  <+   17>        e8 aa aa 25 00                 callq  0x65bf70 <__security_init_cookie>
    0x4014c6  <+   22>        e8 b5 fc ff ff                 callq  0x401180 <__tmainCRTStartup>
    0x4014cb  <+   27>        90                             nop
    0x4014cc  <+   28>        90                             nop
    0x4014cd  <+   29>        48 83 c4 28                    add    $0x28,%rsp
    0x4014d1  <+   33>        c3                             retq
    0x4014d2  <+   34>        0f 1f 40 00                    nopl   0x0(%rax)
    0x4014d6  <+   38>        66 2e 0f 1f 84 00 00 00 00 00  nopw   %cs:0x0(%rax,%rax,1)
    

    or this?

    1 QWidget::raise()                            0x3207c70 
    2 Ui_MainWindow::setupUi ui_mainwindow.h 2602 0x6e3664  
    3 MainWindow::MainWindow mainwindow.cpp  74   0x403f6f  
    4 qMain                  main.cpp        8    0x4015ac  
    5 WinMain                qtmain_win.cpp  97   0x65d41d  
    6 __tmainCRTStartup                           0x4013c7  
    7 WinMainCRTStartup                           0x4014cb  
    
    

    Yes. I made a rebuild of the project


  • Lifetime Qt Champion

    Simplify your code until it no longer crashes. Doesn't look to hard to track down the issues since it's directly in the ctor. I would guess 'ui' is not initialized but without code it's just a wild guess.



  • It is solved - I had to find some updates for external libraries and the problem was gone.


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