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<body><span class="vcard"><a class="email" href="mailto:mclow.lists@gmail.com" title="Marshall Clow (home) <mclow.lists@gmail.com>"> <span class="fn">Marshall Clow (home)</span></a>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - locale scan-build triggers CERT MEM04 zero-length allocation error"
href="http://llvm.org/bugs/show_bug.cgi?id=21321">bug 21321</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
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<td style="text-align:right;">Resolution</td>
<td>---
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<td>INVALID
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - locale scan-build triggers CERT MEM04 zero-length allocation error"
href="http://llvm.org/bugs/show_bug.cgi?id=21321#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - locale scan-build triggers CERT MEM04 zero-length allocation error"
href="http://llvm.org/bugs/show_bug.cgi?id=21321">bug 21321</a>
from <span class="vcard"><a class="email" href="mailto:mclow.lists@gmail.com" title="Marshall Clow (home) <mclow.lists@gmail.com>"> <span class="fn">Marshall Clow (home)</span></a>
</span></b>
<pre>The C++ standard explicitly allows zero-sized allocations
(Quoting from N3937, but it's the same in C++03 and C++11)
See 3.7.4.1/2:
Even if the size of the space requested is zero, the request can fail. If the
request succeeds, the value returned shall be a non-null pointer value (4.10)
p0 different from any previously returned value p1, unless that value p1 was
subsequently passed to an operator delete. The effect of indirecting through a
pointer returned as a request for zero size is undefined. (36)
[ bottom of page ]
36) The intent is to have operator new() implementable by calling std::malloc()
or std::calloc(), so the rules are sub-stantially the same. C++ differs from C
in requiring a zero request to return a non-null pointer.
Note: I'd be happy if you were to open a bug against scan-build for this issue
:-)</pre>
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