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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - fatal error: module file 'path/to/A-xxx.pcm' is out of date and needs to be rebuilt: signature mismatch"
href="https://bugs.llvm.org/show_bug.cgi?id=52268">52268</a>
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<th>Summary</th>
<td>fatal error: module file 'path/to/A-xxx.pcm' is out of date and needs to be rebuilt: signature mismatch
</td>
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<th>Product</th>
<td>clang
</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>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>sunbohong@gmail.com
</td>
</tr>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=25383" name="attach_25383" title="demo">attachment 25383</a> <a href="attachment.cgi?id=25383&action=edit" title="demo">[details]</a></span>
demo
Clang will build an unstable `xxx.pcm`, and it will lead to compilation errors
`is out of date and needs to be rebuilt: signature mismatch`
Here is an example: <a href="https://github.com/sunbohong/clang-module-sign-demo">https://github.com/sunbohong/clang-module-sign-demo</a>
```
fatal error: module file 'path/A-9AU2GFRR1U5N.pcm' is out of date and needs to
be rebuilt: signature mismatch
note: imported by module 'B' in 'path/B-25F7JY52UVDQX.pcm'
note: imported by 'path/clang-module-sign-demo/tmp/c.pch.gch'
1 error generated.
````</pre>
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