[gs-bugs] [Bug 691596] crash when using png output device with particular pdf input file

bugzilla-daemon at ghostscript.com bugzilla-daemon at ghostscript.com
Mon Sep 6 16:43:53 UTC 2010


http://bugs.ghostscript.com/show_bug.cgi?id=691596

--- Comment #2 from Ken Sharp <ken.sharp at artifex.com> 2010-09-06 16:43:53 UTC ---
We seem to encounter a 0 height and width rectangular fill, at x=y=0 during the
course of a clip accumulation. A 0 width and height rectangle at 0,0 is special
cased as a fillpage, but the clip accumulator doesn't have a fillpage method,
so a crash ensues.

This could be fixed by:

1) Not writing bogus fill rectangles.

2) Adding a fillpage method to the clip accumulator

3) Testing the fillpage method to see if its NULL before using it.

Or, of course, I could be barking up completely the wrong tree, this not being
my area of code.

Probably this should go to Ray.

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