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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Inconsistent UndefinedSanitizer report"
href="https://bugs.llvm.org/show_bug.cgi?id=52421">52421</a>
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<th>Summary</th>
<td>Inconsistent UndefinedSanitizer report
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>13.0
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>shaohua.li@inf.ethz.ch
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>Hi there,
I found that the UndefinedSanitizer would report runtime error on the follow
code:
$cat a.c
int main() {
double x = 2147483649;
int y = x;
}
$
$clang-13 -fsanitize=undefined a.c ; ./a.out
a.c:3:10: runtime error: 2.14748e+09 is outside the range of representable
values of type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior a.c:3:10
However, if I changed the 'double' type to 'long', the error report went away.
$cat a.c
int main() {
long x = 2147483649;
int y = x;
}
$
$clang-13 -fsanitize=undefined a.c ; ./a.out
$</pre>
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