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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Crash in brw_begin_transform_feedback"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87694">87694</a>
</td>
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<th>Summary</th>
<td>Crash in brw_begin_transform_feedback
</td>
</tr>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Drivers/DRI/i965
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>nmcveity@gmail.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=111311" name="attach_111311" title="Makefile for demo program">attachment 111311</a> <a href="attachment.cgi?id=111311&action=edit" title="Makefile for demo program">[details]</a></span>
Makefile for demo program
I have found a crash in the i965 gen6 code path on trunk.
The crash occurs if you attempt to perform transform feedback after
you have rendered using a geometry shader.
The work around is to draw something without a geometry shader
before attempting to do any transform feedback.
The attached files contains a simplified demonstration program
using glut.
> make
Will hopefully generate 'will_crash' and 'workaround' executables.
I ran 'will_crash' in gdb with debug versions of mesa trunk @b3057f8
installed on my system. I have attached the backtrace and other info
gleaned from gdb. They are in the attached CRASH.txt file.</pre>
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