Details
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Bug
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Resolution: Duplicate
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P2: Important
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4.6.3
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None
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None
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ubuntu 2.6.32-24-generic #39-Ubuntu SMP Wed Jul 28 06:07:29 UTC 2010 i686 GNU/Linux
gcc (Ubuntu 4.4.3-4ubuntu5) 4.4.3)
Description
When using QFontMetrics in a non-GUI application on X11:
XListFonts is called with an invalid X11 display which leads to a crash. XListFonts should not be called if there is no valid X11 display (since GUIEnbaled == false)
The following code reproduces the error:
#include <QApplication>
#include <QFont>
#include <QFontMetrics>
void testFontHeight()
{
#if defined(QT_CORE_LIB)
QFont font("Courier New", 10);
font.setFixedPitch(true);
QFontMetrics fontMetrics(font);
int iHeight = fontMetrics.height();
int iAscent = fontMetrics.ascent();
int iDescent = fontMetrics.descent();
Q_ASSERT( iHeight == iAscent + iDescent + 1 );
#endif
}
int main(int argc, char *argv[])
{
QApplication a(argc, argv, false);
testFontHeight();
return 0;
}
Here is the backtrace:
#0 XListFonts (dpy=0x0, pattern=0x9114108 "-*-Courier New-*-*-*-*-*-*-*-*-*-*-*-*", maxNames=65535, actualCount=0xbfffe8c8) at ../../src/FontNames.c:52 #1 0x08509b39 in loadXlfds(char const*, int) () #2 0x0850a3d0 in load(QString const&, int, bool) () #3 0x0850e187 in QFontDatabase::loadXlfd(int, int, QFontDef const&, int) () #4 0x0850fbf7 in QFontDatabase::load(QFontPrivate const*, int) () #5 0x084f304c in QFontPrivate::engineForScript(int) const () #6 0x08502ef2 in QFontMetrics::height() const ()
Attachments
Issue Links
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- Closed
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