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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - static analyzer should warn on use of va_arg() macro before call to va_start() macro or after call to va_end() macro"
href="http://llvm.org/bugs/show_bug.cgi?id=16812">16812</a>
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<th>Summary</th>
<td>static analyzer should warn on use of va_arg() macro before call to va_start() macro or after call to va_end() macro
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</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>Static Analyzer
</td>
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<th>Assignee</th>
<td>kremenek@apple.com
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<th>Reporter</th>
<td>oohrah@mac.com
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>It would be nice if the static analyzer gave a warning about use of va_arg()
before the call to va_start() and one about use of va_arg() after the call to
va_end() with this code:
static void func(const char *format, ...)
{
va_list arguments;
int x = va_arg(arguments, int);
va_start (arguments, format);
vprintf(format, arguments);
va_end (arguments);
int y = va_arg(arguments, int);
printf("x + y = %d\n", (x + y));
}</pre>
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</p>
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