passing by reference... my darkest enemy
actual reason below:
In your case (without reference) the compiler generates a temporary object (int) for the first argument of your MyApplication constructor. You pass this temporary int to QApplication’s constructor (with int reference), which saves the address of this reference. Once your MyApplication constructor is done the temporary int is destroyed but QApplication still has its address.
/***************************************************************************/
/* */
/* t1afm.h */
/* */
/* AFM support for Type 1 fonts (specification). */
/* */
/* Copyright 1996-2001, 2002, 2006 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
/* modified, and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/***************************************************************************/
#ifndef __T1AFM_H__
#define __T1AFM_H__
#include <ft2build.h>
#include "t1objs.h"
#include FT_INTERNAL_TYPE1_TYPES_H
FT_BEGIN_HEADER
FT_LOCAL( FT_Error )
T1_Read_Metrics( FT_Face face,
FT_Stream stream );
FT_LOCAL( void )
T1_Done_Metrics( FT_Memory memory,
AFM_FontInfo fi );
FT_LOCAL( void )
T1_Get_Kerning( AFM_FontInfo fi,
FT_UInt glyph1,
FT_UInt glyph2,
FT_Vector* kerning );
FT_LOCAL( FT_Error )
T1_Get_Track_Kerning( FT_Face face,
FT_Fixed ptsize,
FT_Int degree,
FT_Fixed* kerning );
FT_END_HEADER
#endif /* __T1AFM_H__ */
/* END */