[fpc-devel] EXC_BAD_ACCESS on i386-darwin

Vincent Snijders vsnijders at quicknet.nl
Thu Nov 2 14:37:22 CET 2006


I am looking at http://www.freepascal.org/mantis/view.php?id=7723

When the exception is risen the following error is given:
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x0000004f
at gtkwinapiwindow.pp:730
730     gtkwinapiwindow.pp: No such file or directory.
         in gtkwinapiwindow.pp

What kind of exception is this?

Line 730 contains:
if Visible and Blinking and (Timer = 0)

The same variables are used earlier in the procedure, so I don't think the pointer 
to the complete record is wrong (e.g. nil).

The variables accessed are fields in a TCaretInfo record acessed within a with block

   TCaretInfo = record
     X: Integer;
     Y: Integer;
     Width: Integer;
     Height: Integer; 	
     Visible: Boolean;  // Caret is on
     IsDrawn: Boolean;  // Caret is visible at the moment
     Blinking: Boolean; // Caret should blink
     Pixmap: PGDKPixMap;
     BackPixmap: PGDKPixMap;
     Timer: guint;
     ShowHideOnFocus: boolean; // true = hide on loose focus, show on get focus


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