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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion "(_cairo_atomic_int_get (&(&surface->ref_count)->ref_count) > 0)""
href="https://bugs.freedesktop.org/show_bug.cgi?id=91967#c24">Comment # 24</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion "(_cairo_atomic_int_get (&(&surface->ref_count)->ref_count) > 0)""
href="https://bugs.freedesktop.org/show_bug.cgi?id=91967">bug 91967</a>
from <span class="vcard"><a class="email" href="mailto:alberts.muktupavels@gmail.com" title="Alberts Muktupāvels <alberts.muktupavels@gmail.com>"> <span class="fn">Alberts Muktupāvels</span></a>
</span></b>
<pre>(In reply to Jaroslav Škarvada from <a href="show_bug.cgi?id=91967#c23">comment #23</a>)
<span class="quote">> But I think the proposed fix is dirty. It relies on the safety check inside
> the cairo_surface_destroy. Cleanly written code shouldn't do this. The
> control flow should never get into the cairo_surface_destroy for the second
> time, that's why I wrote "maybe there is a better fix". But this is
> definitely question for the upstream maintainers.</span >
I don't want to agree on this.
Check what could happen if it is called this way:
_get_image_surface (..., ..., FALSE);
I am too lazy to count, but there are definitely multiple paths that could end
up calling cairo_surface_destroy (&image->base); when image is still NULL.
Think about this way - setting it to NULL after destroying is same as if that
function would have been called with try_shm = FALSE.</pre>
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