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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - ambiguous template instantiation crashes clang++"
href="http://llvm.org/bugs/show_bug.cgi?id=21293">21293</a>
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<th>Summary</th>
<td>ambiguous template instantiation crashes clang++
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>3.4
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>xz558@nyu.edu
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13208" name="attach_13208" title="Peprocessed source">attachment 13208</a> <a href="attachment.cgi?id=13208&action=edit" title="Peprocessed source">[details]</a></span>
Peprocessed source
clang++ 3.4 crashes with the following simple program. g++ 4.8 reports
'ambiguous template specialization'.
template < typename T >
class DummyClass {
public:
DummyClass(const T &t) {};
template< typename S >
DummyClass(const S &s) {};
void dummyFunction(const T &t) {};
template< typename S >
void dummyFunction(const S &s) {};
};
// These template instantiations are okay
template class DummyClass< int >;
template DummyClass< int >::DummyClass(const double &s);
template DummyClass< int >::dummyFunction(const double &s);
// These template instantiations will cause segmentation fault for clang++ 3.4
// In g++ 4.8, it reports 'ambiguous template specialization'.
template DummyClass< int >::DummyClass(const int &s);
template void DummyClass< int >::dummyFunction(const int &s);
int main() {
return 0;
}</pre>
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