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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ICEs and hangups: block scope + closure + dependent explicit template arguments to call operator"
href="https://bugs.llvm.org/show_bug.cgi?id=50821">50821</a>
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<th>Summary</th>
<td>ICEs and hangups: block scope + closure + dependent explicit template arguments to call operator
</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>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Keywords</th>
<td>compile-fail, crash-on-invalid
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++2a
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>johelegp@gmail.com
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, johelegp@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>Hangup:
```C++
template<auto F> struct quote { template<class... T> using fn =
decltype(F.template operator()<T...>(T{}...)); };
int main() {
auto x = []<class T>(T) {};
using _ = quote<x>::fn<int>;
}
```
ICE:
```C++
template<auto F> struct quote { template<class... T> using fn =
decltype(F.template operator()<T...>(T{}...)); };
int main() {
auto x = []<class T>(T) {};
using _ = quote<x>::fn<>;
}
```</pre>
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