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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - memset(foo,sizeof(foo),0) should warn"
href="https://bugs.llvm.org/show_bug.cgi?id=36242">36242</a>
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<th>Summary</th>
<td>memset(foo,sizeof(foo),0) should warn
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Frontend
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>felix-llvm@fefe.de
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Consider this code:
#include <string.h>
int main() {
char buf[100];
memset(buf,sizeof(buf),0);
}
gcc -Wall will warn about this:
t.c: In function ‘main’:
t.c:6:3: warning: ‘memset’ used with constant zero length parameter; this could
be due to transposed parameters [-Wmemset-transposed-args]
memset(buf,sizeof(buf),0);
^~~~~~
I think clang should warn about this, too.
I tried clang 5.0.1 and 7.0.0 (trunk 323933) with -Weverything and got no
warning.
It could be argued that this belongs in the static analyzer, but even with
scan-build I get no warnings about this.</pre>
</div>
</p>
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