[cairo] Segfault at sweep_line_delete on video playback
cloos at jhcloos.com
Fri Mar 21 02:31:05 PDT 2014
>>>>> "JC" == James Cloos <cloos at jhcloos.com> writes:
JC> This patch should do what Bryce intended, but appears to trigger:
JC> | Program received signal SIGSEGV, Segmentation fault.
JC> | _cairo_clip_path_destroy (clip_path=0x0) at cairo-clip.c:91
JC> | 91 assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&clip_path->ref_count));
My second patch (don't dereference rectangle->left.prev if it is null)
which ends up returning TRUE from sweep_line_delete() also produces that
A change probably is required instead in:
from which sweep_line_delete() is called.
Or perhaps in rectangle_peek_stop(), which creates the rectangle_t in question.
Of course, the existence of assert()s in a library is a bug in itself.
If _cairo_clip_path_destroy() gets a NULL it should just return.
James Cloos <cloos at jhcloos.com> OpenPGP: 1024D/ED7DAEA6
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