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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - SIGSEGV at DeduceTemplateArgumentsByTypeMatch"
href="https://bugs.llvm.org/show_bug.cgi?id=51171">51171</a>
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<th>Summary</th>
<td>SIGSEGV at DeduceTemplateArgumentsByTypeMatch
</td>
</tr>
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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>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>ivan.murashko@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=25049" name="attach_25049" title="The crash reproducer">attachment 25049</a> <a href="attachment.cgi?id=25049&action=edit" title="The crash reproducer">[details]</a></span>
The crash reproducer
There is a SIGSEGV (NULL dereference) at DeduceTemplateArgumentsByTypeMatch as
soon as FunctionType parameter passed into the function is NULL. See reproducer
at the attachment
The possible fix for the problem is
--- a/clang/lib/Sema/SemaTemplateDeduction.cpp
+++ b/clang/lib/Sema/SemaTemplateDeduction.cpp
@@ -4346,7 +4346,7 @@ Sema::TemplateDeductionResult
Sema::DeduceTemplateArguments(
HasDeducedReturnType = true;
}
- if (!ArgFunctionType.isNull()) {
+ if (!ArgFunctionType.isNull() && !FunctionType.isNull()) {
unsigned TDF =
TDF_TopLevelParameterTypeList | TDF_AllowCompatibleFunctionType;
// Deduce template arguments from the function type.</pre>
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