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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Frontend crash due to infinite template recursion"
href="https://bugs.llvm.org/show_bug.cgi?id=41939">41939</a>
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<th>Summary</th>
<td>Frontend crash due to infinite template recursion
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>8.0
</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>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>mschwar42@gmail.com
</td>
</tr>
<tr>
<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>The following (non-valid) C++ snippet causes clang version 8.0 to crash:
// compiled using clang++ test.cpp
#include <iostream>
#include <vector>
template <typename C,
typename std::enable_if_t<std::is_same<decltype(std::ostream() <<
C()),std::ostream&>::value, int> = 0>
std::ostream& operator<<(std::ostream& o, const C& container){
for(const auto& i : container){
o << i;
o << " ";
}
return o;
}
int main(){
std::vector<int> vec = {1,2,3,4};
std::cout<<vec<<std::endl;
}
clang-8: error: unable to execute command: Segmentation fault (core dumped)
clang-8: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 8.0.0 (tags/RELEASE_800/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin</pre>
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