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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Incomplete type allowed for returned brace initialized unique_ptr"
href="https://bugs.llvm.org/show_bug.cgi?id=51402">51402</a>
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<th>Summary</th>
<td>Incomplete type allowed for returned brace initialized unique_ptr
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>12.0
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++11
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>ammiera@hotmail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>I've checked previous versions and seems it's not a regression.
Returning unique_ptr<incomplete_type>{} vs {} (which should be equivalent)
either compiles or not. Trying to assign that returnred value actually triggers
a compilation error, too.
<a href="https://godbolt.org/z/qer8eczhx">https://godbolt.org/z/qer8eczhx</a>
#include <memory>
struct incomplete;
std::unique_ptr<incomplete> u()
{
return {}; //this compiles
// return std::unique_ptr<incomplete>{};// this one gives an error
}
int main(int, char*[])
{
// auto x=u(); // this also gives compilation error
return 0;
}</pre>
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