Invalid parameter passed to C runtime function.
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I have a problem with a application. I've created a debug handler with a own debug window. On a system without Qt, only the needed files, the windows works as expected, but if i work on a system installed with qt, the application crashs with the output "Invalid parameter passed to C runtime function." and with an error box from Microsoft Visual C++ Runtime Library.
I'm not sure what the problem is. The debugwindowdemo is a simple ui class with some debug output. The other files i have posted here.
main.cpp
@#include "debugwindowdemo.h"
#include "debughandler.h"
#include <QtGui/QApplication>
#include <QWidget>
#include <QtGlobal>
#include <QTextBrowser>int main( int argc, char* argv[] ) {
QApplication app( argc, argv );qInstallMsgHandler(debugWinMsgHandler); DebugWindowDemo *dialog = new DebugWindowDemo; dialog->show(); return app.exec();}
@debughandler.h
@#ifndef DEBUGHANDLER_H
#define DEBUGHANDLER_H#include "debugwindow.h"
void debugWinMsgHandler (QtMsgType type, const char* msg) {
static DebugWindow* debugWindow = new DebugWindow;
debugWindow->move(0,0);
debugWindow->show();
switch(type) {
case QtDebugMsg:
debugWindow->append(QString(QObject::tr("D: %1")).arg(msg));
break;
case QtWarningMsg:
debugWindow->append(QString(QObject::tr("W: %1")).arg(msg));
break;
case QtCriticalMsg:
debugWindow->append(QString(QObject::tr("C: %1")).arg(msg));
break;
case QtFatalMsg:
debugWindow->append(QString(QObject::tr("F: %1")).arg(msg));
break;
}
}
#endif
@debugwindow.h
@#ifndef DEBUGWINDOW_H
#define DEBUGWINDOW_H#include <QDialog>
namespace Ui {
class DebugWindow;
}class DebugWindow : public QDialog
{
Q_OBJECTpublic:
explicit DebugWindow(QWidget *parent = 0);
~DebugWindow();public slots:
void append(QString);private:
Ui::DebugWindow *ui;private slots:
void search(QString);
void print();
void save();};
#endif // DEBUGWINDOW_H
@debugwindow.cpp
@#include "debugwindow.h"
#include "ui_debugwindow.h"#include <QMessageBox>
#include <QFileDialog>
#include <QTextStream>
#include <QPrintDialog>
#include <QPrinter>
#include <QFont>DebugWindow::DebugWindow(QWidget *parent) :
QDialog(parent),
ui(new Ui::DebugWindow)
{
QFont newFont("Ubuntu", 8);
this->setFont(newFont);
ui->setupUi(this);
ui->tbClear->setVisible(false);
connect(ui->leSearch,SIGNAL(textChanged(QString)),this,SLOT(search(QString)));
connect(ui->tbClear,SIGNAL(clicked()),ui->leSearch,SLOT(clear()));
connect(ui->pbPrint,SIGNAL(clicked()),this,SLOT(print()));
connect(ui->pbSave,SIGNAL(clicked()),this,SLOT(save()));
connect(ui->pbClose,SIGNAL(clicked()),this,SLOT(close()));
}DebugWindow::~DebugWindow()
{
delete ui;
}void DebugWindow::append(QString str)
{
ui->teLog->append(str);
}void DebugWindow::search(QString pattern)
{
ui->tbClear->setVisible(!pattern.isEmpty());
QTextDocument* document = ui->teLog->document();QTextCharFormat noBackground; noBackground.clearBackground(); QTextCharFormat highlight; highlight.setBackground (QBrush(QColor(239,41,41,200))); QTextCursor allText = QTextCursor(document); allText.select(QTextCursor::Document); allText.setCharFormat(noBackground); QRegExp expression = QRegExp(pattern,Qt::CaseInsensitive,QRegExp::RegExp2); QTextCursor cursor = document->find(expression,QTextCursor(document),0); while (!cursor.isNull()) { cursor.select(QTextCursor::LineUnderCursor); cursor.setCharFormat(highlight); cursor = document->find(expression,cursor,0); }}
void DebugWindow::save()
{
QString fileName = QFileDialog::getSaveFileName(this,QObject::tr("Logfile speichern"),QDir::homePath(),QObject::tr("Logfile (*.log)"));
if (!fileName.isEmpty())
{
if (!fileName.endsWith("log"))
{
fileName = fileName+".log";
}
QFile file(fileName);
if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
{
QString message = QString("%1%2%3")
.arg(QObject::tr("Die Datei "))
.arg(fileName)
.arg(QObject::tr(" kann nicht gespeichert werden!"));
QMessageBox::critical(this,QObject::tr("Fehler beim Speichenrn der Logfile."),message);
}
else
{
QTextStream out(&file);
out.setGenerateByteOrderMark(true);
out << ui->teLog->toPlainText();
file.close();
QString message = QString("%1%2%3")
.arg(QObject::tr("Die Logfile "))
.arg(fileName)
.arg(QObject::tr(" wurde erfolgreich gespeichert!"));
QMessageBox::information(this,QObject::tr("Logfile erfolgreich gespeichert!"),message);
}
}
}void DebugWindow::print()
{
QTextDocument *document = ui->teLog->document();
QPrinter printer;
QPrintDialog printDialog(&printer);
if (printDialog.exec() != QDialog::Accepted)
{
return;
}
document->print(&printer);
}
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so, you are using build 2010.05 with mingw. And which version is installed on the machine, where it crashes? Are those versions the same? The error sounds (for a first read) to be caused by different versions or different builds (with different parameters, compilers etc). That's why I'm asking...
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The same version is installed on the system where it crash. the "funny" part is, on a system without qt sdk, only with the needed qt files (libgcc_s_dw2-1.dll, mingwm10.dll, QtCored4.dll, QtGuid4.dll) it works.
Last night i found out (lot of things i've tried eg switching debugwindow from qdialog to qwidget), that it has to be a problem of the ui file (i think so)... i created a new designer class, copied!!! the code into the cpp/h files and "copied" the ui elements with the designer to the other ui file... and you wouldn't believe it, it works.. i will post the original ui file... i haven't found any errors within, but maybe there is another problem:
debugwindow.ui
http://pastebin.com/XpiyNF3K -
Thanks for the hint here Torsten - I had a similar problem here. The only difference was a .qml file was saved with whatever System encoding Mac runs, and on my Win7 I got the same "Invalid parameter passed to C runtime function.” error.
The fix was to "Save with Encoding" UTF-8 and rebuild - then it worked without errors? Did you file a bug-report?
_Update: _ Actually turned out to be another bug (exception thrown and the program didn't know what to do) :) Nevermind, nothing to see here :D