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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - scan-build did not found error on simple program with assert()"
href="https://llvm.org/bugs/show_bug.cgi?id=30679">30679</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>scan-build did not found error on simple program with assert()
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.8
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Static Analyzer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>kremenek@apple.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>socketpair@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>#include <stdio.h>
#include <assert.h>
static void show(const char *const msg)
{
assert(msg != NULL);
printf("msg=%s\n", msg);
}
int main(void)
{
show("qwe");
show(NULL);
show("asd");
return 0;
}
==================================
scan-build finds no error in this code. But finds other errors (like possibly
memory leakage when I explicitly add such error in the code.
=============
scan-build-3.8 gcc qwe.c
scan-build: Using '/usr/lib/llvm-3.8/bin/clang' for static analysis
scan-build: Removing directory '/tmp/scan-build-2016-10-13-000037-5639-1'
because it contains no reports.
scan-build: No bugs found.
=============
qwe.i: (no difference on gcc and clang except whitespaces)
...
(!)!!!!!! note __noreturn__ and <a href="http://clang-analyzer.llvm.org/annotations.html">http://clang-analyzer.llvm.org/annotations.html</a>
!!!!!
# 69 "/usr/include/assert.h" 3 4
extern void __assert_fail (const char *__assertion, const char *__file,
unsigned int __line, const char *__function)
__attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__noreturn__));
...
static void show(const char *const msg)
{
((msg != ((void *)0)) ? (void) (0) : __assert_fail ("msg != NULL", "qwe.c",
7, __PRETTY_FUNCTION__))
printf("msg=%s\n", msg);
}
...
=================</pre>
</div>
</p>
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