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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion failure comparing result of ballotARB"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101360">101360</a>
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<th>Summary</th>
<td>Assertion failure comparing result of ballotARB
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</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
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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>glsl-compiler
</td>
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
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<th>Reporter</th>
<td>jlegg@feralinteractive.com
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</tr>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<pre>Created <span class=""><a href="attachment.cgi?id=131825" name="attach_131825" title="Piglit test reproducing the problem">attachment 131825</a> <a href="attachment.cgi?id=131825&action=edit" title="Piglit test reproducing the problem">[details]</a></span>
Piglit test reproducing the problem
When comparing a constant to the result of a call to the ballotARB function, or
a variable containing the result, an assert in void
glsl_to_tgsi_visitor::copy_propagate() can fail. If assertions are disabled,
then copy_propagate writes over the end of an allocation, corrupting memory
instead.
The attached patch to piglit adds a test reproducing the problem.
Steps to reproduce:
1) Apply attached patch to piglit
2) Run ./piglit run -t arb_shader_ballot shader results/ballot
The newly added test will crash.
The test crashes with:
state_tracker/st_glsl_to_tgsi.cpp:4936: void
glsl_to_tgsi_visitor::copy_propagate(): Assertion `inst->dst[0].file !=
PROGRAM_TEMPORARY || inst->dst[0].index < this->next_temp' failed.
I'm using mesa ada3c3aa3da5d04bd597014dc1b5d4b028313513 with an AMD RX480.</pre>
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