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Forum Update on Monday, May 27th 2025

Application crashes at subclassed QMainWindow argv reading

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qapplicationqmainwindowargvsubclasscrashed
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  • J Offline
    J Offline
    JackMyson
    wrote on 4 Aug 2023, 06:08 last edited by JackMyson 8 Apr 2023, 06:17
    #1

    I am using macOS 13.4 (Ventura) developing projects in Qt 6.5.1.

    When I am developing my own Qt project, while its app modifier and controller is by subclassing QApplication, the app crashes at the point where the application starts with an argument that the Qt builtin's one doesn't recognized. For example,

    ./App.app/Contents/MacOs/App --reverse

    This command works without exit abnormally. However,

    ./App.app/Contents/MacOs/App asdf

    It crashes, saying it's caused by a segment fault (exit code 11 with BAD_ACCESS, and of course without a proper display of help message saying that the asdf parameter is not recognized. It just crashed. This also greatly affects the initial file path to be processed contained in the argv pointer list, like:

    ./App.app/Contents/MacOs/App /Users/User/Desktop/test.txt

    Crashed.

    Here are the Minimal Reproducible Example:

    BrStormTextApplication.hpp

    #ifndef BRSTORMTEXTAPPLICATION_HPP
#define BRSTORMTEXTAPPLICATION_HPP

#include <QApplication>
#include <QEvent>

class BrStormTextApplication : public QApplication
{
    Q_OBJECT
public:
    BrStormTextApplication(int argc, char *argv[]);
public slots:
    void setConstructed(bool c) {m_c = c;}
public:
    bool event(QEvent *event) override;
signals:
    void fileOpened(QString file);
private:
    bool m_c = false;
};

#endif // BRSTORMTEXTAPPLICATION_HPP

    BrStormTextApplication.cpp

    #include "BrStormTextApplication.hpp"
#include "BrStormTextMainWindow.hpp"
#include <QFile>
#include <QFileOpenEvent>

BrStormTextApplication::BrStormTextApplication(int argc, char *argv[])
    : QApplication(argc, argv)
{
    setApplicationDisplayName(tr("StormText"));
    setApplicationName("BrStormText");
    setApplicationVersion(tr("0.7.0 (beta)"));
    setObjectName("BrStormTextApplication");
}

bool BrStormTextApplication::event(QEvent *event)
{
    if (event->type() == QEvent::FileOpen && m_c)
    {
        QFileOpenEvent *e = static_cast<QFileOpenEvent*>(event);
        emit fileOpened(e->file());
    }
    return QApplication::event(event);
}

    BrStormTextMainWindow.hpp

    #ifndef BRSTORMTEXTMAINWINDOW_HPP
#define BRSTORMTEXTMAINWINDOW_HPP

#include <QAction>
#include <QActionGroup>
#include <QDockWidget>
#include <QFileSystemModel>
#include <QMainWindow>
#include <QMenu>
#include <QMenuBar>
#include <QToolButton>
#include <QTreeView>
#include "BrStormTextTab.hpp"
#include "BrStormTextStatusBar.hpp"
#include "BrStormTextDialogs/BrStormTextAboutApplicationDialog.hpp"
#include "BrStormTextDialogs/BrStormTextAboutDialog.hpp"
#include "BrStormTextDialogs/BrStormTextGotoDialog.hpp"
#include "BrStormTextFindDock.hpp"

class BrStormTextApplication;
class BrStormTextMainWindow : public QMainWindow
{
    Q_OBJECT
public:
    BrStormTextMainWindow(QList<QString> argv, BrStormTextApplication *app, int u = 0, bool o = false, QWidget *parent = nullptr);
public:
    void closeEvent(QCloseEvent *event);
public slots:
    void openThroughArgs(QString path);
private:
    void initUi();
    void initMenus();
    void initFileMenu();
    ...
    void initHelpMenu();
    void initActionGroups();
    void initTabs();
    void initStatusBar();
    void initFileBrowser();
    void initFindDock();
    void initSignals();
private slots:
    ... // Other non-related methods
private:
    ... // Menus, tree views and list views
    BrStormTextTab *m_tab;
private:
    int m_untitled;
    BrStormTextApplication *m_app;
};

#endif // BRSTORMTEXTMAINWINDOW_HPP

    BrStormTextMainWindow.cpp

    #include "BrStormTextMainWindow.hpp"
#include "BrStormTextEditor.hpp"
#include "BrStormTextDialogs/BrStormTextOpenDialog.hpp"
#include "BrStormTextDialogs/BrStormTextSaveCopyToDialog.hpp"
#include "BrStormTextDialogs/BrStormTextSaveDialog.hpp"
#include "BrStormTextApplication.hpp"
#include <QCloseEvent>
#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QFileIconProvider>
#include <QHeaderView>
#include <QMessageBox>
#include <Qsci/qscilexer.h>
#include <QTextStream>

BrStormTextMainWindow::BrStormTextMainWindow(QList<QString> argv, BrStormTextApplication *app, int u, bool o, QWidget *parent)
    : QMainWindow(parent)
{
    m_untitled = u;
    m_app = app;
    initUi();
    if (o) openFile(true);
    for (const QString &str : argv)
    {
        openThroughArgs(str);
    }
}

void BrStormTextMainWindow::openThroughArgs(QString path)
{
    QFile f(path);

    if (!m_tab) return;

    if (!f.exists())
    {
        QMessageBox msg = QMessageBox(this);
        msg.setWindowModality(Qt::WindowModal);
        msg.setWindowTitle(tr("FileNoutFoundError"));
        msg.setIcon(QMessageBox::Critical);
        msg.setText(tr("Sorry, the file you have selected does not exists."));
        msg.setInformativeText(tr("Check if you have misspelt the file name,"
                                  "the file path or check your network connections. \n"
                                  "BR_STORMTEXT_0x00003855"));
        msg.setStandardButtons(QMessageBox::Ok);
        msg.exec();
        return;
    }

    if (f.open(QFile::ReadOnly | QFile::Text))
    {
        QTextStream ts(&f);
        QString c = ts.readAll();
        QFileInfo fi(f);
        QFileIconProvider fip;
        QIcon icns = fip.icon(fi);
        QString ce = fi.completeSuffix().toLower();
        BrStormTextEditor *ed;
        ed = new BrStormTextEditor();
        ed->setText(c);

        connect(ed, &BrStormTextEditor::modificationChanged,
                this, [=](bool m){setWindowModified(m);});

        if (ce == "avs")
        {
            ed->setLexerAVS(true);
        }
        else if (ce == "sh"
                 || ce == "bash")
        {
            ed->setLexerBash(true);
        }
        else if (ce == "bat"
                 || ce =="cmd"
                 || ce == "btm")
        {
            ed->setLexerBatch(true);
        }
        else if (ce == "cpp"
                 || ce == "cxx"
                 || ce == "cc"
                 || ce == "ii"
                 || ce == "h"
                 || ce == "hpp"
                 || ce == "hxx")
        {
            ed->setLexerCPP(true);
        }
        ......
        else if (ce == "xml"
                 || ce == "svg"
                 || ce == "svgx"
                 || ce == "plist"
                 || ce == "string"
                 || ce == "qrc"
                 || ce == "rc"
                 || ce == "ui"
                 || c.startsWith("<?xml version="))
        {
            ed->setLexerXML(true);
        }
        else if (ce == "yml")
        {
            ed->setLexerYAML(true);
        }

        int i = m_tab->addTab(ed, icns, fi.fileName());
        m_tab->setTabToolTip(i, fi.absoluteFilePath());
        m_tab->setCurrentIndex(i);
        m_tab->currentTab()->setModified(false);
        setWindowModified(m_tab->currentTab()->isModified());
    }

    else
    {
        QMessageBox msg = QMessageBox(this);
        msg.setWindowModality(Qt::WindowModal);
        msg.setWindowTitle(tr("OSError"));
        msg.setIcon(QMessageBox::Critical);
        msg.setText(tr("Sorry, the file you have selected cannot be opened."));
        msg.setInformativeText(tr("This might be caused by inconsistence file access,"
                                  "Or the disconnection of your current network "
                                  "condition. Try to contact your technical manager / "
                                  "system administrator for more information / solution. \n"
                                  "BR_STORMTEXT_0x00000094"));
        msg.setStandardButtons(QMessageBox::Ok);
        msg.exec();
        return;
    }

    f.close();
    return;
}

void BrStormTextMainWindow::initUi()
{
    m_aAppD = new BrStormTextAboutApplicationDialog(this);
   ...

    initMenus();
    initTabs();
    initStatusBar();
    initFileBrowser();
    initFindDock();
    initSignals();

    connect(m_app, SIGNAL(fileOpened(QString)),
            this, SLOT(openThroughArgs(QString)));
}
...

    main.cpp

    #include "BrStormTextApplication.hpp"
#include "BrStormTextMainWindow.hpp"

int main(int argc, char *argv[])
{
    try
    {
        QList<QString> argvFiles = {};

        if (argc >= 2)
        {
            for (int i = 1; i < argc; i++)
            {
                if (QFile(QString(argv[i])).exists()) argvFiles.push_back(QString(argv[i]));
            }
        }

        BrStormTextApplication app(argc, argv);
        BrStormTextMainWindow mw(argvFiles, &app);
        app.setConstructed(true);
        mw.showMaximized();

        return app.exec();
    }
    catch (std::exception &e)
    {
        Q_UNUSED(e)
        return 1;
    }
}

    PS I am making a text editor using the QScintilla framework. Document at https://brdocumentation.github.io/qscintilla/index.html for reference.

    I am very wondering what I am wrong. Thanks for every work and views! Appreciate.

    J J 2 Replies Last reply 4 Aug 2023, 06:09
    0
    • J JackMyson
      4 Aug 2023, 06:44

      @jsulm
      've removed the line:

      QList<QString> argvFiles = {};

        /*if (argc >= 2)
        {
            for (int i = 1; i < argc; i++)
            {
                if (QFile(QString(argv[i])).exists()) argvFiles.push_back(QString(argv[i]));
            }
        }*/

      But still the same error:

      zsh: segmentation fault  ./StormText /Users/.../lang-avs.avs
      C Offline
      C Offline
      Christian Ehrlicher
      Lifetime Qt Champion
      wrote on 4 Aug 2023, 07:22 last edited by
      #6

      Your argc is wrong. It must be a reference according to the documentation. There is even a big red note. Reading the docs sometimes helps.

      Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
      Visit the Qt Academy at https://academy.qt.io/catalog

      1 Reply Last reply
      4
      • J JackMyson
        4 Aug 2023, 06:08

        I am using macOS 13.4 (Ventura) developing projects in Qt 6.5.1.

        When I am developing my own Qt project, while its app modifier and controller is by subclassing QApplication, the app crashes at the point where the application starts with an argument that the Qt builtin's one doesn't recognized. For example,

        ./App.app/Contents/MacOs/App --reverse

        This command works without exit abnormally. However,

        ./App.app/Contents/MacOs/App asdf

        It crashes, saying it's caused by a segment fault (exit code 11 with BAD_ACCESS, and of course without a proper display of help message saying that the asdf parameter is not recognized. It just crashed. This also greatly affects the initial file path to be processed contained in the argv pointer list, like:

        ./App.app/Contents/MacOs/App /Users/User/Desktop/test.txt

        Crashed.

        Here are the Minimal Reproducible Example:

        BrStormTextApplication.hpp

        #ifndef BRSTORMTEXTAPPLICATION_HPP
#define BRSTORMTEXTAPPLICATION_HPP

#include <QApplication>
#include <QEvent>

class BrStormTextApplication : public QApplication
{
    Q_OBJECT
public:
    BrStormTextApplication(int argc, char *argv[]);
public slots:
    void setConstructed(bool c) {m_c = c;}
public:
    bool event(QEvent *event) override;
signals:
    void fileOpened(QString file);
private:
    bool m_c = false;
};

#endif // BRSTORMTEXTAPPLICATION_HPP

        BrStormTextApplication.cpp

        #include "BrStormTextApplication.hpp"
#include "BrStormTextMainWindow.hpp"
#include <QFile>
#include <QFileOpenEvent>

BrStormTextApplication::BrStormTextApplication(int argc, char *argv[])
    : QApplication(argc, argv)
{
    setApplicationDisplayName(tr("StormText"));
    setApplicationName("BrStormText");
    setApplicationVersion(tr("0.7.0 (beta)"));
    setObjectName("BrStormTextApplication");
}

bool BrStormTextApplication::event(QEvent *event)
{
    if (event->type() == QEvent::FileOpen && m_c)
    {
        QFileOpenEvent *e = static_cast<QFileOpenEvent*>(event);
        emit fileOpened(e->file());
    }
    return QApplication::event(event);
}

        BrStormTextMainWindow.hpp

        #ifndef BRSTORMTEXTMAINWINDOW_HPP
#define BRSTORMTEXTMAINWINDOW_HPP

#include <QAction>
#include <QActionGroup>
#include <QDockWidget>
#include <QFileSystemModel>
#include <QMainWindow>
#include <QMenu>
#include <QMenuBar>
#include <QToolButton>
#include <QTreeView>
#include "BrStormTextTab.hpp"
#include "BrStormTextStatusBar.hpp"
#include "BrStormTextDialogs/BrStormTextAboutApplicationDialog.hpp"
#include "BrStormTextDialogs/BrStormTextAboutDialog.hpp"
#include "BrStormTextDialogs/BrStormTextGotoDialog.hpp"
#include "BrStormTextFindDock.hpp"

class BrStormTextApplication;
class BrStormTextMainWindow : public QMainWindow
{
    Q_OBJECT
public:
    BrStormTextMainWindow(QList<QString> argv, BrStormTextApplication *app, int u = 0, bool o = false, QWidget *parent = nullptr);
public:
    void closeEvent(QCloseEvent *event);
public slots:
    void openThroughArgs(QString path);
private:
    void initUi();
    void initMenus();
    void initFileMenu();
    ...
    void initHelpMenu();
    void initActionGroups();
    void initTabs();
    void initStatusBar();
    void initFileBrowser();
    void initFindDock();
    void initSignals();
private slots:
    ... // Other non-related methods
private:
    ... // Menus, tree views and list views
    BrStormTextTab *m_tab;
private:
    int m_untitled;
    BrStormTextApplication *m_app;
};

#endif // BRSTORMTEXTMAINWINDOW_HPP

        BrStormTextMainWindow.cpp

        #include "BrStormTextMainWindow.hpp"
#include "BrStormTextEditor.hpp"
#include "BrStormTextDialogs/BrStormTextOpenDialog.hpp"
#include "BrStormTextDialogs/BrStormTextSaveCopyToDialog.hpp"
#include "BrStormTextDialogs/BrStormTextSaveDialog.hpp"
#include "BrStormTextApplication.hpp"
#include <QCloseEvent>
#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QFileIconProvider>
#include <QHeaderView>
#include <QMessageBox>
#include <Qsci/qscilexer.h>
#include <QTextStream>

BrStormTextMainWindow::BrStormTextMainWindow(QList<QString> argv, BrStormTextApplication *app, int u, bool o, QWidget *parent)
    : QMainWindow(parent)
{
    m_untitled = u;
    m_app = app;
    initUi();
    if (o) openFile(true);
    for (const QString &str : argv)
    {
        openThroughArgs(str);
    }
}

void BrStormTextMainWindow::openThroughArgs(QString path)
{
    QFile f(path);

    if (!m_tab) return;

    if (!f.exists())
    {
        QMessageBox msg = QMessageBox(this);
        msg.setWindowModality(Qt::WindowModal);
        msg.setWindowTitle(tr("FileNoutFoundError"));
        msg.setIcon(QMessageBox::Critical);
        msg.setText(tr("Sorry, the file you have selected does not exists."));
        msg.setInformativeText(tr("Check if you have misspelt the file name,"
                                  "the file path or check your network connections. \n"
                                  "BR_STORMTEXT_0x00003855"));
        msg.setStandardButtons(QMessageBox::Ok);
        msg.exec();
        return;
    }

    if (f.open(QFile::ReadOnly | QFile::Text))
    {
        QTextStream ts(&f);
        QString c = ts.readAll();
        QFileInfo fi(f);
        QFileIconProvider fip;
        QIcon icns = fip.icon(fi);
        QString ce = fi.completeSuffix().toLower();
        BrStormTextEditor *ed;
        ed = new BrStormTextEditor();
        ed->setText(c);

        connect(ed, &BrStormTextEditor::modificationChanged,
                this, [=](bool m){setWindowModified(m);});

        if (ce == "avs")
        {
            ed->setLexerAVS(true);
        }
        else if (ce == "sh"
                 || ce == "bash")
        {
            ed->setLexerBash(true);
        }
        else if (ce == "bat"
                 || ce =="cmd"
                 || ce == "btm")
        {
            ed->setLexerBatch(true);
        }
        else if (ce == "cpp"
                 || ce == "cxx"
                 || ce == "cc"
                 || ce == "ii"
                 || ce == "h"
                 || ce == "hpp"
                 || ce == "hxx")
        {
            ed->setLexerCPP(true);
        }
        ......
        else if (ce == "xml"
                 || ce == "svg"
                 || ce == "svgx"
                 || ce == "plist"
                 || ce == "string"
                 || ce == "qrc"
                 || ce == "rc"
                 || ce == "ui"
                 || c.startsWith("<?xml version="))
        {
            ed->setLexerXML(true);
        }
        else if (ce == "yml")
        {
            ed->setLexerYAML(true);
        }

        int i = m_tab->addTab(ed, icns, fi.fileName());
        m_tab->setTabToolTip(i, fi.absoluteFilePath());
        m_tab->setCurrentIndex(i);
        m_tab->currentTab()->setModified(false);
        setWindowModified(m_tab->currentTab()->isModified());
    }

    else
    {
        QMessageBox msg = QMessageBox(this);
        msg.setWindowModality(Qt::WindowModal);
        msg.setWindowTitle(tr("OSError"));
        msg.setIcon(QMessageBox::Critical);
        msg.setText(tr("Sorry, the file you have selected cannot be opened."));
        msg.setInformativeText(tr("This might be caused by inconsistence file access,"
                                  "Or the disconnection of your current network "
                                  "condition. Try to contact your technical manager / "
                                  "system administrator for more information / solution. \n"
                                  "BR_STORMTEXT_0x00000094"));
        msg.setStandardButtons(QMessageBox::Ok);
        msg.exec();
        return;
    }

    f.close();
    return;
}

void BrStormTextMainWindow::initUi()
{
    m_aAppD = new BrStormTextAboutApplicationDialog(this);
   ...

    initMenus();
    initTabs();
    initStatusBar();
    initFileBrowser();
    initFindDock();
    initSignals();

    connect(m_app, SIGNAL(fileOpened(QString)),
            this, SLOT(openThroughArgs(QString)));
}
...

        main.cpp

        #include "BrStormTextApplication.hpp"
#include "BrStormTextMainWindow.hpp"

int main(int argc, char *argv[])
{
    try
    {
        QList<QString> argvFiles = {};

        if (argc >= 2)
        {
            for (int i = 1; i < argc; i++)
            {
                if (QFile(QString(argv[i])).exists()) argvFiles.push_back(QString(argv[i]));
            }
        }

        BrStormTextApplication app(argc, argv);
        BrStormTextMainWindow mw(argvFiles, &app);
        app.setConstructed(true);
        mw.showMaximized();

        return app.exec();
    }
    catch (std::exception &e)
    {
        Q_UNUSED(e)
        return 1;
    }
}

        PS I am making a text editor using the QScintilla framework. Document at https://brdocumentation.github.io/qscintilla/index.html for reference.

        I am very wondering what I am wrong. Thanks for every work and views! Appreciate.

        J Offline
        J Offline
        JackMyson
        wrote on 4 Aug 2023, 06:09 last edited by JackMyson 8 Apr 2023, 06:11
        #2

        Here are the crash report:

        -------------------------------------
Translated Report (Full Report Below)
-------------------------------------

Process:               StormText [7554]
Path:                  /Users/USER/*/StormText.app/Contents/MacOS/StormText
Identifier:            org.**************************.StormText
Version:               ???
Code Type:             X86-64 (Native)
Parent Process:        zsh [5594]
Responsible:           Terminal [3425]
User ID:               501

Date/Time:             2023-08-03 17:16:41.2890 +0800
OS Version:            macOS 13.4 (22F66)
Report Version:        12
Anonymous UUID:        4566117B-****-****-****-07A965E31605


Time Awake Since Boot: 21000 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       UNKNOWN_0xD at 0x0000000000000000
Exception Codes:       0x000000000000000d, 0x0000000000000000

Termination Reason:    Namespace SIGNAL, Code 11 Segmentation fault: 11
Terminating Process:   exc handler [7554]

VM Region Info: 0 is not in any region.  Bytes before following region: 4543410176
      REGION TYPE                    START - END         [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      UNUSED SPACE AT START
--->  
      __TEXT                      10ecef000-10ed87000    [  608K] r-x/r-x SM=COW  ...cOS/StormText

Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   libsystem_platform.dylib      	    0x7ff81b4c1f12 _platform_strlen + 18
1   QtCore                        	       0x111f1a062 QCoreApplication::arguments() + 146
2   libqcocoa.dylib               	       0x10f17703f 0x10f16c000 + 45119
3   AppKit                        	    0x7ff81ea214af -[NSApplication _doOpenFile:ok:tryTemp:] + 267
4   AppKit                        	    0x7ff81e5f7463 -[NSApplication finishLaunching] + 2076
5   AppKit                        	    0x7ff81e5f6998 -[NSApplication run] + 250
6   libqcocoa.dylib               	       0x10f1835b7 0x10f16c000 + 95671
7   QtCore                        	       0x111f20f36 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 486
8   QtCore                        	       0x111f17d27 QCoreApplication::exec() + 119
9   StormText                     	       0x10ed36a57 main + 919
10  dyld                          	       0x10f6ad41f start + 1903

Thread 1:
0   libsystem_pthread.dylib       	    0x7ff81b492bb0 start_wqthread + 0

Thread 2:
0   libsystem_pthread.dylib       	    0x7ff81b492bb0 start_wqthread + 0

Thread 3:
0   libsystem_pthread.dylib       	    0x7ff81b492bb0 start_wqthread + 0

Thread 4:
0   libsystem_pthread.dylib       	    0x7ff81b492bb0 start_wqthread + 0

Thread 5:
0   libsystem_pthread.dylib       	    0x7ff81b492bb0 start_wqthread + 0

Thread 6:: Thread (pooled)
0   libsystem_kernel.dylib        	       0x10ee200ee __psynch_cvwait + 10
1   libsystem_pthread.dylib       	    0x7ff81b497758 _pthread_cond_wait + 1242
2   QtCore                        	       0x1120b5fac 0x111ea9000 + 2150316
3   QtCore                        	       0x1120b5cae 0x111ea9000 + 2149550
4   QtCore                        	       0x1120b5bfe QWaitCondition::wait(QMutex*, QDeadlineTimer) + 94
5   QtCore                        	       0x1120affd5 0x111ea9000 + 2125781
6   QtCore                        	       0x1120abab3 0x111ea9000 + 2108083
7   libsystem_pthread.dylib       	    0x7ff81b4971d3 _pthread_start + 125
8   libsystem_pthread.dylib       	    0x7ff81b492bd3 thread_start + 15

Thread 7:: Thread (pooled)
0   libsystem_kernel.dylib        	       0x10ee200ee __psynch_cvwait + 10
1   libsystem_pthread.dylib       	    0x7ff81b497758 _pthread_cond_wait + 1242
2   QtCore                        	       0x1120b5fac 0x111ea9000 + 2150316
3   QtCore                        	       0x1120b5cae 0x111ea9000 + 2149550
4   QtCore                        	       0x1120b5bfe QWaitCondition::wait(QMutex*, QDeadlineTimer) + 94
5   QtCore                        	       0x1120affd5 0x111ea9000 + 2125781
6   QtCore                        	       0x1120abab3 0x111ea9000 + 2108083
7   libsystem_pthread.dylib       	    0x7ff81b4971d3 _pthread_start + 125
8   libsystem_pthread.dylib       	    0x7ff81b492bd3 thread_start + 15

Thread 8:: Thread (pooled)
0   libsystem_kernel.dylib        	       0x10ee200ee __psynch_cvwait + 10
1   libsystem_pthread.dylib       	    0x7ff81b497758 _pthread_cond_wait + 1242
2   QtCore                        	       0x1120b5fac 0x111ea9000 + 2150316
3   QtCore                        	       0x1120b5cae 0x111ea9000 + 2149550
4   QtCore                        	       0x1120b5bfe QWaitCondition::wait(QMutex*, QDeadlineTimer) + 94
5   QtCore                        	       0x1120affd5 0x111ea9000 + 2125781
6   QtCore                        	       0x1120abab3 0x111ea9000 + 2108083
7   libsystem_pthread.dylib       	    0x7ff81b4971d3 _pthread_start + 125
8   libsystem_pthread.dylib       	    0x7ff81b492bd3 thread_start + 15

Thread 9:: Thread (pooled)
0   libsystem_kernel.dylib        	       0x10ee200ee __psynch_cvwait + 10
1   libsystem_pthread.dylib       	    0x7ff81b497758 _pthread_cond_wait + 1242
2   QtCore                        	       0x1120b5fac 0x111ea9000 + 2150316
3   QtCore                        	       0x1120b5cae 0x111ea9000 + 2149550
4   QtCore                        	       0x1120b5bfe QWaitCondition::wait(QMutex*, QDeadlineTimer) + 94
5   QtCore                        	       0x1120affd5 0x111ea9000 + 2125781
6   QtCore                        	       0x1120abab3 0x111ea9000 + 2108083
7   libsystem_pthread.dylib       	    0x7ff81b4971d3 _pthread_start + 125
8   libsystem_pthread.dylib       	    0x7ff81b492bd3 thread_start + 15

Thread 10:: QFileInfoGatherer
0   libsystem_kernel.dylib        	       0x10ee200ee __psynch_cvwait + 10
1   libsystem_pthread.dylib       	    0x7ff81b497758 _pthread_cond_wait + 1242
2   QtCore                        	       0x1120b5c8b 0x111ea9000 + 2149515
3   QtCore                        	       0x1120b5bfe QWaitCondition::wait(QMutex*, QDeadlineTimer) + 94
4   QtGui                         	       0x10fc21e6d QFileInfoGatherer::run() + 125
5   QtCore                        	       0x1120abab3 0x111ea9000 + 2108083
6   libsystem_pthread.dylib       	    0x7ff81b4971d3 _pthread_start + 125
7   libsystem_pthread.dylib       	    0x7ff81b492bd3 thread_start + 15


Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x00007ff7b1210938  rbx: 0x6261747563657865  rcx: 0x6261747563657865  rdx: 0x6261747563657865
  rdi: 0x6261747563657860  rsi: 0x0000000000007fd7  rbp: 0x00007ff7b120fb50  rsp: 0x00007ff7b120fb50
   r8: 0x00007fb3863ae010   r9: 0x00007ff7b120fc10  r10: 0x00000000000004e0  r11: 0x00006000003c193c
  r12: 0x0000000000000021  r13: 0x0000000000007ff7  r14: 0x00007ff7b120fb68  r15: 0x00007ff7b120fc00
  rip: 0x00007ff81b4c1f12  rfl: 0x0000000000010206  cr2: 0x00007fb3863ae000
  
Logical CPU:     0
Error Code:      0x00000000 
Trap Number:     13

Thread 0 instruction stream:
  29 07 c5 fc 29 47 20 48-83 c7 40 48 83 ea 40 77  )...)G H..@H..@w
  ed c5 fc 11 04 17 c5 fc-11 44 17 20 c5 f8 77 5d  .........D. ..w]
  c3 48 89 34 17 48 83 ea-08 73 f6 48 83 c2 08 74  .H.4.H...s.H...t
  0b 40 88 74 17 ff 48 83-ea 01 75 f5 5d c3 90 90  .@.t..H...u.]...
  90 90 90 90 90 90 90 90-90 90 90 90 90 90 55 48  ..............UH
  89 e5 48 89 f9 48 89 fa-48 83 e7 f0 66 0f ef c0  ..H..H..H...f...
 [66]0f 74 07 66 0f d7 f0-48 83 e1 0f 48 83 c8 ff  f.t.f...H...H...	<==
  48 d3 e0 21 c6 74 17 0f-bc c6 48 29 d7 48 01 f8  H..!.t....H).H..
  5d c3 66 2e 0f 1f 84 00-00 00 00 00 66 90 48 83  ].f.........f.H.
  c7 10 66 0f ef c0 66 0f-74 07 66 0f d7 f0 85 f6  ..f...f.t.f.....
  74 ec eb d3 65 48 8b 0c-25 18 00 00 00 41 89 c8  t...eH..%....A..
  31 c0 f0 4c 0f b1 07 0f-85 7a 1f 00 00 e9 00 00  1..L.....z......

Binary Images:
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       0x10f2de000 -        0x10f501fff libqscintilla2_qt6.15.2.0.dylib (*) <ac050aa8-5999-3d76-a862-44b353aea2fa> /Users/USER/*/libqscintilla2_qt6.15.2.0.dylib
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       0x10ee1c000 -        0x10ee57fff libsystem_kernel.dylib (*) <eb4e80a0-99da-32dc-b9ad-394fbb50a0ac> /usr/lib/system/libsystem_kernel.dylib
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       0x18bf15000 -        0x18bf18fff libGPUCompilerUtils.dylib (*) <d5ce0002-b778-37c5-917b-186e88376470> /System/Library/PrivateFrameworks/GPUCompiler.framework/Versions/31001/Libraries/libGPUCompilerUtils.dylib
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       0x110d9d000 -        0x110e2cfff libqwebp.dylib (*) <83aa8873-d2b5-310a-816e-77a08d2e9802> /Users/USER/*/libqwebp.dylib
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       0x111e28000 -        0x111e97fff libqjpeg.dylib (*) <cd91086e-f2b9-3c0a-915f-9f798d020539> /Users/USER/*/libqjpeg.dylib
       0x111d5c000 -        0x111dc7fff libqtiff.dylib (*) <44803655-9eed-3505-9578-b0df99061637> /Users/USER/*/libqtiff.dylib
       0x10f689000 -        0x10f690fff libqsvg.dylib (*) <f707818c-446d-3d0e-b81a-4b47ff614a9d> /Users/USER/*/libqsvg.dylib
       0x209536000 -        0x209571fff org.qt-project.QtSvg (6.5) <7a844e24-d780-35b4-b9ac-05229591c71d> /Users/USER/*/QtSvg.framework/Versions/A/QtSvg
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       0x110e60000 -        0x110e67fff libqtga.dylib (*) <6725362e-fb88-3d2d-8cd5-ec9bfe11c4d2> /Users/USER/*/libqtga.dylib
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External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 1
    thread_create: 0
    thread_set_state: 4

VM Region Summary:
ReadOnly portion of Libraries: Total=463.6M resident=0K(0%) swapped_out_or_unallocated=463.6M(100%)
Writable regions: Total=4.4G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=4.4G(100%)

                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Accelerate framework               128K        1 
Activity Tracing                   256K        1 
CG image                            36K        1 
ColorSync                          252K       27 
CoreUI image data                  260K        4 
Foundation                          16K        1 
Kernel Alloc Once                    8K        1 
MALLOC                           189.5M       55 
MALLOC guard page                   32K        8 
MALLOC_NANO (reserved)           384.0M        1         reserved VM address space (unallocated)
STACK GUARD                       56.0M       11 
Stack                             13.1M       12 
VM_ALLOCATE                         80K        5 
VM_ALLOCATE (reserved)             3.8G        4         reserved VM address space (unallocated)
__CTF                               824        1 
__DATA                            18.2M      357 
__DATA_CONST                      15.4M      226 
__DATA_DIRTY                       676K      108 
__FONT_DATA                        2352        1 
__LINKEDIT                       178.4M       32 
__OBJC_RO                         66.3M        1 
__OBJC_RW                         2013K        2 
__TEXT                           285.2M      375 
dyld private memory                260K        2 
mapped file                      181.2M       31 
shared memory                      776K       16 
===========                     =======  ======= 
TOTAL                              5.2G     1284 
TOTAL, minus reserved VM space     1.0G     1284 



-----------
Full Report
-----------

{"app_name":"StormText","timestamp":"2023-08-03 17:16:41.00 +0800","app_version":"0.7.0 (beta)","slice_uuid":"00940740-e0d2-3a3e-ae3d-7e7061aac7ec","build_version":"0.7","platform":1,"bundleID":"org.BrightSoftwareFoundation.StormText","share_with_app_devs":1,"is_first_party":0,"bug_type":"309","os_version":"macOS 13.4 (22F66)","roots_installed":0,"name":"StormText","incident_id":"2640A77B-C820-4036-B0F6-76A472FFAB44"}
{
  "uptime" : 21000,
  "procRole" : "Background",
  "version" : 2,
  "userID" : 501,
  "deployVersion" : 210,
  "modelCode" : "MacBookAir6,1",
  "coalitionID" : 2616,
  "osVersion" : {
    "train" : "macOS 13.4",
    "build" : "22F66",
    "releaseType" : "User"
  },
  "captureTime" : "2023-08-03 17:16:41.2890 +0800",
  "incident" : "2640A77B-C820-4036-B0F6-76A472FFAB44",
  "pid" : 7554,
  "cpuType" : "X86-64",
  "roots_installed" : 0,
  "bug_type" : "309",
  "procLaunch" : "2023-08-03 17:16:40.4817 +0800",
  "procStartAbsTime" : 21150685922820,
  "procExitAbsTime" : 21151491852648,
  "procName" : "StormText",
  "procPath" : "\/Users\/USER\/*\/StormText.app\/Contents\/MacOS\/StormText",
  "bundleInfo" : {"CFBundleShortVersionString":"0.7.0 (beta)","CFBundleVersion":"0.7","CFBundleIdentifier":"org.BrightSoftwareFoundation.StormText"},
  "storeInfo" : {"deviceIdentifierForVendor":"3AF01067-5158-5C8F-9FB0-05F8F401B1DD","thirdParty":true},
  "parentProc" : "zsh",
  "parentPid" : 5594,
  "coalitionName" : "com.apple.Terminal",
  "crashReporterKey" : "4566117B-6536-0C74-6A7F-07A965E31605",
  "responsiblePid" : 3425,
  "responsibleProc" : "Terminal",
  "codeSigningID" : "",
  "codeSigningTeamID" : "",
  "codeSigningValidationCategory" : 0,
  "codeSigningTrustLevel" : 0,
  "sip" : "enabled",
  "vmRegionInfo" : "0 is not in any region.  Bytes before following region: 4543410176\n      REGION TYPE                    START - END         [ VSIZE] PRT\/MAX SHRMOD  REGION DETAIL\n      UNUSED SPACE AT START\n--->  \n      __TEXT                      10ecef000-10ed87000    [  608K] r-x\/r-x SM=COW  ...cOS\/StormText",
  "exception" : {"codes":"0x000000000000000d, 0x0000000000000000","rawCodes":[13,0],"type":"EXC_BAD_ACCESS","signal":"SIGSEGV","subtype":"UNKNOWN_0xD at 0x0000000000000000"},
  "termination" : {"flags":0,"code":11,"namespace":"SIGNAL","indicator":"Segmentation fault: 11","byProc":"exc handler","byPid":7554},
  "vmregioninfo" : "0 is not in any region.  Bytes before following region: 4543410176\n      REGION TYPE                    START - END         [ VSIZE] PRT\/MAX SHRMOD  REGION DETAIL\n      UNUSED SPACE AT START\n--->  \n      __TEXT                      10ecef000-10ed87000    [  608K] r-x\/r-x SM=COW  ...cOS\/StormText",
  "extMods" : {"caller":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"system":{"thread_create":0,"thread_set_state":4,"task_for_pid":1},"targeted":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"warnings":0},
  "faultingThread" : 0,
  "threads" : [{"triggered":true,"id":182907,"instructionState":{"instructionStream":{"bytes":

...

  "vmSummary" : "ReadOnly portion of Libraries: Total=463.6M resident=0K(0%) swapped_out_or_unallocated=463.6M(100%)\nWritable regions: Total=4.4G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=4.4G(100%)\n\n                                VIRTUAL   REGION \nREGION TYPE                        SIZE    COUNT (non-coalesced) \n===========                     =======  ======= \nAccelerate framework               128K        1 \nActivity Tracing                   256K        1 \nCG image                            36K        1 \nColorSync                          252K       27 \nCoreUI image data                  260K        4 \nFoundation                          16K        1 \nKernel Alloc Once                    8K        1 \nMALLOC                           189.5M       55 \nMALLOC guard page                   32K        8 \nMALLOC_NANO (reserved)           384.0M        1         reserved VM address space (unallocated)\nSTACK GUARD                       56.0M       11 \nStack                             13.1M       12 \nVM_ALLOCATE                         80K        5 \nVM_ALLOCATE (reserved)             3.8G        4         reserved VM address space (unallocated)\n__CTF                               824        1 \n__DATA                            18.2M      357 \n__DATA_CONST                      15.4M      226 \n__DATA_DIRTY                       676K      108 \n__FONT_DATA                        2352        1 \n__LINKEDIT                       178.4M       32 \n__OBJC_RO                         66.3M        1 \n__OBJC_RW                         2013K        2 \n__TEXT                           285.2M      375 \ndyld private memory                260K        2 \nmapped file                      181.2M       31 \nshared memory                      776K       16 \n===========                     =======  ======= \nTOTAL                              5.2G     1284 \nTOTAL, minus reserved VM space     1.0G     1284 \n",
  "legacyInfo" : {
  "threadTriggered" : {
    "queue" : "com.apple.main-thread"
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},
  "logWritingSignature" : "04c74f291e613f274b54935ee1b4361d4d44874b",
  "trialInfo" : {
  "rollouts" : [
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      "factorPackIds" : {

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      "deploymentId" : 240000008
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      "factorPackIds" : {

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      "deploymentId" : 240000055
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  "experiments" : [

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}
}
        1 Reply Last reply
        0
        • J Offline
          J Offline
          JackMyson
          wrote on 4 Aug 2023, 06:21 last edited by
          #3

          By the way even if I use the QCoreApplication::arguments().at(for i in range(...)) instead of using raw argv directly it still gave me the exactly 100% same crash report, saying CODE_11__BAD_ACCESS segment fault:

          ...

        BrStormTextApplication app(argc, argv);

        QList<QString> argvFiles = {};

        if (app.arguments().length() >= 2)
        {
            for (const QString &str : app.arguments())
            {
                if (QFile(str).exists()) argvFiles.push_back(str);
            }
        }

        BrStormTextMainWindow mw(argvFiles, &app);
        app.setConstructed(true);
        mw.showMaximized();

        return app.exec();
    }
...
          1 Reply Last reply
          0
          • J JackMyson
            4 Aug 2023, 06:08

            I am using macOS 13.4 (Ventura) developing projects in Qt 6.5.1.

            When I am developing my own Qt project, while its app modifier and controller is by subclassing QApplication, the app crashes at the point where the application starts with an argument that the Qt builtin's one doesn't recognized. For example,

            ./App.app/Contents/MacOs/App --reverse

            This command works without exit abnormally. However,

            ./App.app/Contents/MacOs/App asdf

            It crashes, saying it's caused by a segment fault (exit code 11 with BAD_ACCESS, and of course without a proper display of help message saying that the asdf parameter is not recognized. It just crashed. This also greatly affects the initial file path to be processed contained in the argv pointer list, like:

            ./App.app/Contents/MacOs/App /Users/User/Desktop/test.txt

            Crashed.

            Here are the Minimal Reproducible Example:

            BrStormTextApplication.hpp

            #ifndef BRSTORMTEXTAPPLICATION_HPP
#define BRSTORMTEXTAPPLICATION_HPP

#include <QApplication>
#include <QEvent>

class BrStormTextApplication : public QApplication
{
    Q_OBJECT
public:
    BrStormTextApplication(int argc, char *argv[]);
public slots:
    void setConstructed(bool c) {m_c = c;}
public:
    bool event(QEvent *event) override;
signals:
    void fileOpened(QString file);
private:
    bool m_c = false;
};

#endif // BRSTORMTEXTAPPLICATION_HPP

            BrStormTextApplication.cpp

            #include "BrStormTextApplication.hpp"
#include "BrStormTextMainWindow.hpp"
#include <QFile>
#include <QFileOpenEvent>

BrStormTextApplication::BrStormTextApplication(int argc, char *argv[])
    : QApplication(argc, argv)
{
    setApplicationDisplayName(tr("StormText"));
    setApplicationName("BrStormText");
    setApplicationVersion(tr("0.7.0 (beta)"));
    setObjectName("BrStormTextApplication");
}

bool BrStormTextApplication::event(QEvent *event)
{
    if (event->type() == QEvent::FileOpen && m_c)
    {
        QFileOpenEvent *e = static_cast<QFileOpenEvent*>(event);
        emit fileOpened(e->file());
    }
    return QApplication::event(event);
}

            BrStormTextMainWindow.hpp

            #ifndef BRSTORMTEXTMAINWINDOW_HPP
#define BRSTORMTEXTMAINWINDOW_HPP

#include <QAction>
#include <QActionGroup>
#include <QDockWidget>
#include <QFileSystemModel>
#include <QMainWindow>
#include <QMenu>
#include <QMenuBar>
#include <QToolButton>
#include <QTreeView>
#include "BrStormTextTab.hpp"
#include "BrStormTextStatusBar.hpp"
#include "BrStormTextDialogs/BrStormTextAboutApplicationDialog.hpp"
#include "BrStormTextDialogs/BrStormTextAboutDialog.hpp"
#include "BrStormTextDialogs/BrStormTextGotoDialog.hpp"
#include "BrStormTextFindDock.hpp"

class BrStormTextApplication;
class BrStormTextMainWindow : public QMainWindow
{
    Q_OBJECT
public:
    BrStormTextMainWindow(QList<QString> argv, BrStormTextApplication *app, int u = 0, bool o = false, QWidget *parent = nullptr);
public:
    void closeEvent(QCloseEvent *event);
public slots:
    void openThroughArgs(QString path);
private:
    void initUi();
    void initMenus();
    void initFileMenu();
    ...
    void initHelpMenu();
    void initActionGroups();
    void initTabs();
    void initStatusBar();
    void initFileBrowser();
    void initFindDock();
    void initSignals();
private slots:
    ... // Other non-related methods
private:
    ... // Menus, tree views and list views
    BrStormTextTab *m_tab;
private:
    int m_untitled;
    BrStormTextApplication *m_app;
};

#endif // BRSTORMTEXTMAINWINDOW_HPP

            BrStormTextMainWindow.cpp

            #include "BrStormTextMainWindow.hpp"
#include "BrStormTextEditor.hpp"
#include "BrStormTextDialogs/BrStormTextOpenDialog.hpp"
#include "BrStormTextDialogs/BrStormTextSaveCopyToDialog.hpp"
#include "BrStormTextDialogs/BrStormTextSaveDialog.hpp"
#include "BrStormTextApplication.hpp"
#include <QCloseEvent>
#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QFileIconProvider>
#include <QHeaderView>
#include <QMessageBox>
#include <Qsci/qscilexer.h>
#include <QTextStream>

BrStormTextMainWindow::BrStormTextMainWindow(QList<QString> argv, BrStormTextApplication *app, int u, bool o, QWidget *parent)
    : QMainWindow(parent)
{
    m_untitled = u;
    m_app = app;
    initUi();
    if (o) openFile(true);
    for (const QString &str : argv)
    {
        openThroughArgs(str);
    }
}

void BrStormTextMainWindow::openThroughArgs(QString path)
{
    QFile f(path);

    if (!m_tab) return;

    if (!f.exists())
    {
        QMessageBox msg = QMessageBox(this);
        msg.setWindowModality(Qt::WindowModal);
        msg.setWindowTitle(tr("FileNoutFoundError"));
        msg.setIcon(QMessageBox::Critical);
        msg.setText(tr("Sorry, the file you have selected does not exists."));
        msg.setInformativeText(tr("Check if you have misspelt the file name,"
                                  "the file path or check your network connections. \n"
                                  "BR_STORMTEXT_0x00003855"));
        msg.setStandardButtons(QMessageBox::Ok);
        msg.exec();
        return;
    }

    if (f.open(QFile::ReadOnly | QFile::Text))
    {
        QTextStream ts(&f);
        QString c = ts.readAll();
        QFileInfo fi(f);
        QFileIconProvider fip;
        QIcon icns = fip.icon(fi);
        QString ce = fi.completeSuffix().toLower();
        BrStormTextEditor *ed;
        ed = new BrStormTextEditor();
        ed->setText(c);

        connect(ed, &BrStormTextEditor::modificationChanged,
                this, [=](bool m){setWindowModified(m);});

        if (ce == "avs")
        {
            ed->setLexerAVS(true);
        }
        else if (ce == "sh"
                 || ce == "bash")
        {
            ed->setLexerBash(true);
        }
        else if (ce == "bat"
                 || ce =="cmd"
                 || ce == "btm")
        {
            ed->setLexerBatch(true);
        }
        else if (ce == "cpp"
                 || ce == "cxx"
                 || ce == "cc"
                 || ce == "ii"
                 || ce == "h"
                 || ce == "hpp"
                 || ce == "hxx")
        {
            ed->setLexerCPP(true);
        }
        ......
        else if (ce == "xml"
                 || ce == "svg"
                 || ce == "svgx"
                 || ce == "plist"
                 || ce == "string"
                 || ce == "qrc"
                 || ce == "rc"
                 || ce == "ui"
                 || c.startsWith("<?xml version="))
        {
            ed->setLexerXML(true);
        }
        else if (ce == "yml")
        {
            ed->setLexerYAML(true);
        }

        int i = m_tab->addTab(ed, icns, fi.fileName());
        m_tab->setTabToolTip(i, fi.absoluteFilePath());
        m_tab->setCurrentIndex(i);
        m_tab->currentTab()->setModified(false);
        setWindowModified(m_tab->currentTab()->isModified());
    }

    else
    {
        QMessageBox msg = QMessageBox(this);
        msg.setWindowModality(Qt::WindowModal);
        msg.setWindowTitle(tr("OSError"));
        msg.setIcon(QMessageBox::Critical);
        msg.setText(tr("Sorry, the file you have selected cannot be opened."));
        msg.setInformativeText(tr("This might be caused by inconsistence file access,"
                                  "Or the disconnection of your current network "
                                  "condition. Try to contact your technical manager / "
                                  "system administrator for more information / solution. \n"
                                  "BR_STORMTEXT_0x00000094"));
        msg.setStandardButtons(QMessageBox::Ok);
        msg.exec();
        return;
    }

    f.close();
    return;
}

void BrStormTextMainWindow::initUi()
{
    m_aAppD = new BrStormTextAboutApplicationDialog(this);
   ...

    initMenus();
    initTabs();
    initStatusBar();
    initFileBrowser();
    initFindDock();
    initSignals();

    connect(m_app, SIGNAL(fileOpened(QString)),
            this, SLOT(openThroughArgs(QString)));
}
...

            main.cpp

            #include "BrStormTextApplication.hpp"
#include "BrStormTextMainWindow.hpp"

int main(int argc, char *argv[])
{
    try
    {
        QList<QString> argvFiles = {};

        if (argc >= 2)
        {
            for (int i = 1; i < argc; i++)
            {
                if (QFile(QString(argv[i])).exists()) argvFiles.push_back(QString(argv[i]));
            }
        }

        BrStormTextApplication app(argc, argv);
        BrStormTextMainWindow mw(argvFiles, &app);
        app.setConstructed(true);
        mw.showMaximized();

        return app.exec();
    }
    catch (std::exception &e)
    {
        Q_UNUSED(e)
        return 1;
    }
}

            PS I am making a text editor using the QScintilla framework. Document at https://brdocumentation.github.io/qscintilla/index.html for reference.

            I am very wondering what I am wrong. Thanks for every work and views! Appreciate.

            J Online
            J Online
            jsulm
            Lifetime Qt Champion
            wrote on 4 Aug 2023, 06:21 last edited by
            #4

            @JackMyson said in Application crashes at subclassed QMainWindow argv reading:

            if (argc >= 2)
            {
            for (int i = 1; i < argc; i++)
            {
            if (QFile(QString(argv[i])).exists()) argvFiles.push_back(QString(argv[i]));
            }
            }

            Why are you doing this? Your main window can get the application parameters from QApplication (using qApp) at any time. Also, stack trace after the crash could help to identify the issue.

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

            1 Reply Last reply
            0
            • J Offline
              J Offline
              JackMyson
              wrote on 4 Aug 2023, 06:44 last edited by
              #5

              @jsulm
              've removed the line:

              QList<QString> argvFiles = {};

        /*if (argc >= 2)
        {
            for (int i = 1; i < argc; i++)
            {
                if (QFile(QString(argv[i])).exists()) argvFiles.push_back(QString(argv[i]));
            }
        }*/

              But still the same error:

              zsh: segmentation fault  ./StormText /Users/.../lang-avs.avs
              C 1 Reply Last reply 4 Aug 2023, 07:22
              0
              • J JackMyson
                4 Aug 2023, 06:44

                @jsulm
                've removed the line:

                QList<QString> argvFiles = {};

        /*if (argc >= 2)
        {
            for (int i = 1; i < argc; i++)
            {
                if (QFile(QString(argv[i])).exists()) argvFiles.push_back(QString(argv[i]));
            }
        }*/

                But still the same error:

                zsh: segmentation fault  ./StormText /Users/.../lang-avs.avs
                C Offline
                C Offline
                Christian Ehrlicher
                Lifetime Qt Champion
                wrote on 4 Aug 2023, 07:22 last edited by
                #6

                Your argc is wrong. It must be a reference according to the documentation. There is even a big red note. Reading the docs sometimes helps.

                Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                Visit the Qt Academy at https://academy.qt.io/catalog

                1 Reply Last reply
                4
                • P Offline
                  P Offline
                  Paul Colby
                  wrote on 4 Aug 2023, 12:38 last edited by Paul Colby 8 Apr 2023, 12:38
                  #7

                  Hi @JackMyson,

                  Among other issues, your BrStormTextMainWindow::m_tab pointer is being dereferenced without ever being initialised (unless you've dropped the initialisation code out of the sample).

                  Have you tried running this with the debugger?

                  Cheers.

                  1 Reply Last reply
                  1
                  • J Offline
                    J Offline
                    JackMyson
                    wrote on 4 Aug 2023, 12:44 last edited by JackMyson 8 Apr 2023, 12:48
                    #8

                    Hi @Paul-Colby ,

                    Even my Qt Creator 4 built-in debugger ran out of luck: crashed because of the same segment fault, before even the application window has shown.

                    Also thanks for your meticulous observations, I have really dropped the initialisation statement “m_tab = tabs;” out of the MRE.

                    1 Reply Last reply
                    0
                    • J Offline
                      J Offline
                      JackMyson
                      wrote on 4 Aug 2023, 12:57 last edited by
                      #9

                      Announcing that this problem is solved.

                      I am really appreciate and grateful to your suggestions and advice, after all the segment fault is no more occur.

                      🙏🏻. It troubles me for around a week.

                      1 Reply Last reply
                      0
                      • J JackMyson has marked this topic as solved on 4 Aug 2023, 12:57

                      9/9

                      4 Aug 2023, 12:57

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