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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - noexcept in destructor of class with anonymous union causes crash"
href="https://llvm.org/bugs/show_bug.cgi?id=23584">23584</a>
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<th>Summary</th>
<td>noexcept in destructor of class with anonymous union causes crash
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.5
</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>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>christian.r.shelton@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=14345" name="attach_14345" title="clang++ backtrace">attachment 14345</a> <a href="attachment.cgi?id=14345&action=edit" title="clang++ backtrace">[details]</a></span>
clang++ backtrace
This is as simple as I've been able to get the example. The code has a bug (it
does not destruct either union member). The original had this logic, but it
wasn't necessary to trigger the clang++ abort, so I removed it:
template<typename T>
struct wrap {
T x;
constexpr wrap(const T &xx) : x(xx) {}
};
template<typename R1, typename R2>
struct commonunion_node {
typedef wrap<R1> type1;
typedef wrap<R2> type2;
union {
type1 t1;
type2 t2;
};
constexpr commonunion_node(R1 &tt1) : t1(tt1) {}
constexpr commonunion_node(R2 &tt2) : t2(tt2) {}
~commonunion_node() noexcept {} // remove "noexcept" to "fix" crash
};
struct A {
~A() {}
};
struct B {
~B() {}
};
int main(int argv, char **argc) {
A a;
commonunion_node<A,B> cu(a);
}</pre>
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