Bug 2950

Summary:	* glibc detected * double free or corruption
Product:	cairo	Reporter:	Steve Chaplin <d74n5pohf9>
Component:	general	Assignee:	Carl Worth <cworth>
Status:	RESOLVED FIXED	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	normal
Priority:	high	CC:	jwatt
Version:	0.9.3
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Steve Chaplin 2005-04-10 03:35:44 UTC

The following short program gives the error message:
*** glibc detected *** double free or corruption: 0x082a7268 ***
Aborted


// start of program ---
// gcc `pkg-config --cflags --libs cairo` test_surface_finish.c -o
test_surface_finish

#include <cairo.h>

int
main (void)
{
    cairo_surface_t *surface;
    surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 10, 10);
    cairo_surface_finish (surface);
    cairo_surface_finish (surface);
    return 0;
}
// end of program --

I realise you would not deliberately call cairo_surface_finish() twice, but I
think cairo should handle the situation gracefully.

Comment 1 Carl Worth 2005-04-13 14:53:05 UTC

Thanks for the report. It was definitely a bug.

Fortunately, it was also very easy to fix. The code was just
neglecting to actually set the surface->finished field.

Now fixed in CVS, (and a test case added: cairo/test/surface-finish-twice.c).

Comment 2 Carl Worth 2005-08-22 17:15:04 UTC

Move bugs against "cvs" version to "0.9.3" so we can remove the "cvs" version.

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