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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - compiler crash when doing lambda magic"
href="http://llvm.org/bugs/show_bug.cgi?id=22479">22479</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>compiler crash when doing lambda magic
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>janezz55@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13813" name="attach_13813" title="the required attackment">attachment 13813</a> <a href="attachment.cgi?id=13813&action=edit" title="the required attackment">[details]</a></span>
the required attackment
Try compiling this and you'll get a crash:
#ifndef GENERIC_CIFY_HPP
# define GENERIC_CIFY_HPP
# pragma once
#include <utility>
namespace generic
{
namespace
{
template <typename F, int I, typename L, typename R, typename ...A>
inline F cify(L&& l, R (*)(A...))
{
static thread_local L l_(::std::forward<L>(l));
static thread_local bool full;
if (full)
{
l_.~L();
new (static_cast<void*>(&l_)) L(::std::forward<L>(l));
}
else
{
full = true;
}
return [](A... args) noexcept(noexcept(l_(::std::forward<A>(args)...))) {
return l_(::std::forward<A>(args)...);
};
}
}
template <typename F, int I = 0, typename L>
inline F cify(L&& l)
{
return cify<F, I>(::std::forward<L>(l), F());
}
}
#endif // GENERIC_CIFY_HPP
#include <iostream>
int main()
{
int a;
auto const f(::generic::cify<void(*)()>([a]{::std::cout << "a: " << a <<
::std::endl;}));
f();
return 0;
}</pre>
</div>
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