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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - If an array element lifetime-extends a temporary, we destroy the objects in the wrong order"
href="http://llvm.org/bugs/show_bug.cgi?id=16476">16476</a>
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<th>Summary</th>
<td>If an array element lifetime-extends a temporary, we destroy the objects in the wrong order
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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>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>richard-llvm@metafoo.co.uk
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Consider:
struct A { ~A(); };
struct B { const A &a; ~B(); };
void f() { B b[2] = { A(), A() }; }
The 'A' objects are lifetime-extended here. Since we are supposed to clean up
automatic objects in reverse construction order (and C++11 sequences list
initialization), we should call:
~B() for b[0]
~A() for b[0]'s temporary
~B() for b[1]
~A() for b[1]'s temporary
However, clang emits a cleanup for the B[2] array instead, and so destroys both
B objects before either A object.</pre>
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