段错误 - QTCN开发网 - Powered by phpwind

只看楼主倒序阅读楼主发表于: 2013-04-13

平台 windows 7 + mingw gcc 4.4 + qt 4.8.4。
我的程序相当简单，使用mingw32-make生成的debug可执行文件可以运行正常。gdb一调试就出段错误，界面可以出来，但是按钮上的“hello!"不见了。小弟QT新手，求指点。代码如下：

#include <QApplication>
#include <QPushButton>

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);

    QPushButton* mw = new QPushButton();
    mw->setText("hello!");
        mw->show();

    return app.exec();
}

gdb调试的输出：

I:\qt_rio\sample\debug>gdb sample.exe
GNU gdb 6.8
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-mingw32"...
(gdb) r
Starting program: I:\qt_rio\sample\debug/sample.exe
[New thread 2184.0x1464]
[New thread 2184.0xb24]

Program received signal SIGSEGV, Segmentation fault.
0x0d1d29b5 in winhafnt!UninstallDetours ()
   from C:\Windows\system32\winhafnt.dll
(gdb) q
The program is running.  Exit anyway? (y or n) y

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离线jdwx

论坛版主

只看该作者 1楼发表于: 2013-04-13

复制代码

#include <QApplication>
#include <QPushButton>
int main(int argc, char* argv[])
{
QApplication app(argc, argv);
QPushButton mw ;
mw.setText("hello!");
mw.show();
return app.exec();
}

改成这样吧，重新qmake，make。

发帖时要说明：操作系统、Qt版本、编译器，这样能更快的得到回复。

离线hcfalan

新手上路

只看该作者 2楼发表于: 2013-04-13

代码已经按你说的改了。重新make和编译了，还是不行，快疯了：
rmdir /q /s debug
qmake sample.pro
mingw32-make debug
cd debug

I:\qt_rio\sample\debug>gdb sample.exe
GNU gdb 6.8
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-mingw32"...
(gdb) r
Starting program: I:\qt_rio\sample\debug/sample.exe
[New thread 7072.0x1170]
[New thread 7072.0x13f4]

Program received signal SIGSEGV, Segmentation fault.
0x0d5429b5 in winhafnt!UninstallDetours ()
   from C:\Windows\system32\winhafnt.dll
(gdb) q
The program is running.  Exit anyway? (y or n) y