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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - FileCheck cannot match a particular regex combination"
href="https://bugs.llvm.org/show_bug.cgi?id=36492">36492</a>
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<th>Summary</th>
<td>FileCheck cannot match a particular regex combination
</td>
</tr>
<tr>
<th>Product</th>
<td>Test Suite
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>lit
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rafael.espindola@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>daniel@zuster.org, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
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<pre>Given
$ cat foo
foo foo foo
foo
foo foo
foo foo foo
foo foo foo
foo foo foo
foo foo foo
$ cat check
CHECK: foo foo foo
CHECK: foo [[ABC:foo]] foo
CHECK: foo [[ABC:foo]] [[ABC]]
CHECK: {{.*}} [[ABC:foo]] [[ABC]]
CHECK: {{(foo)}} [[ABC:foo]] [[ABC]]
CHECK: {{(foo)?}} [[ABC:foo]] [[ABC]]
Only the last line fails to match:
$ FileCheck check < foo
check:6:8: error: expected string not found in input
CHECK: {{(foo)?}} [[ABC:foo]] [[ABC]]</pre>
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