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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Test failure: constructor and deconstructor called unequal number of times"
href="https://bugs.llvm.org/show_bug.cgi?id=40363">40363</a>
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<th>Summary</th>
<td>Test failure: constructor and deconstructor called unequal number of times
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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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>
</tr>
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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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</tr>
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<th>Reporter</th>
<td>stefanp@ca.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>The following passed but now fails:
// -- test.cpp --
int ctor = 0;
int dtor = 0;
struct A {
A() { ctor++; }
~A() { dtor++; }
A(const A&) { ctor++; }
};
int main()
{
ctor = dtor = 0;
try {
A a[100];
const auto& x = [a](A b){return a[37];}((throw 47, a[59]));
}
catch (...) { }
if (ctor != dtor)
return 1;
return 0;
}
Compile command:
clang++ -std=c++11 -o test test.cpp
./test
The main should return with 0 but it now returns 1.
Narrowed down the change and it seems that this change has caused/exposed the
issue.
-----
Author: Richard Smith
Date: Fri Oct 19 19:01:34 2018 +0000
PR24164, PR39336: init-captures are not distinct full-expressions.
Rather, they are subexpressions of the enclosing lambda-expression, and
any temporaries in them are destroyed at the end of that
full-expression, or when the corresponding lambda-expression is
destroyed if they are lifetime-extended.
-----</pre>
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