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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - cairo snapshot 1.15.[2,4], win32 backend: assertion (surface->is_clear) failed"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99054">99054</a>
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<th>Summary</th>
<td>cairo snapshot 1.15.[2,4], win32 backend: assertion (surface->is_clear) failed
</td>
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<th>Product</th>
<td>cairo
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>critical
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>win32 backend
</td>
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<th>Assignee</th>
<td>cairo-bugs@cairographics.org
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</tr>
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<th>Reporter</th>
<td>wippbox@gmx.net
</td>
</tr>
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<th>QA Contact</th>
<td>cairo-bugs@cairographics.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=128411" name="attach_128411" title="Fix">attachment 128411</a> <a href="attachment.cgi?id=128411&action=edit" title="Fix">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=99054&attachment=128411'>[review]</a>
Fix
I cross-compiled cairo-1.15.2 and cairo-1.15.4 for windows.
When running a test program, I get the following:
<span class="quote">> Assertion failed!
>
> File: src/cairo-surface.c, Line 545
>
> Expression: surface->is_clear
>
> abnormal program termination</span >
This happens in cairo_surface_create_similar.
Adding a line
<span class="quote">> new_surf->is_clear = TRUE;</span >
at the end of _cairo_win32_display_surface_create_similar in
src/win32/cairo-win32-display-surface.c
fixes the issue (see patch).
Remark: The particular case occured only for width = 0 in
cairo_surface_create_similar. For width > 0 the issue did not happen.</pre>
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