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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - FileCheck Crash with Malformed Regex"
href="https://bugs.llvm.org/show_bug.cgi?id=49319">49319</a>
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<th>Summary</th>
<td>FileCheck Crash with Malformed Regex
</td>
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<th>Product</th>
<td>Test Suite
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>lit
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>nadiasggeb001@gmail.com
</td>
</tr>
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<th>CC</th>
<td>daniel@zuster.org, llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Tested on LLVM with the most recent commit:
a08e609d2eac7737bfc14cd4ee35b2cabe1238b6.
Given the following "check.mlir"
```
// CHECK: [[a:*]]
```
Running with
```
./bin/FileCheck ../check.mlir
```
I expect to see FileCheck emit an error about invalid regex or wait for input
on stdin, but instead I see the attached segmentation fault and subsequent
stack trace.</pre>
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