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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Segmentation fault in memet function"
href="https://bugs.llvm.org/show_bug.cgi?id=45122">45122</a>
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<th>Summary</th>
<td>Segmentation fault in memet function
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>6.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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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
</td>
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<th>Reporter</th>
<td>haoxintu@gmail.com
</td>
</tr>
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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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<p>
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<pre>Hi, this code test.c
#include <stdio.h>
#include <string.h>
void foo(int* a ) {
a[-1]=1;
}
int main (int argc, char* argv[]) {
int size= 10;
printf("%d\n", size);
int array[size];
memset(array,0,size*sizeof(int));
foo(array);
return 0;
}
get "Segmentation fault" when I use `clang-6.0 test.c ` to compiler and then
`./a.out` to execute (-O1 is also fault, in ubuntu 16.04).
I know that the index of an array is -1 and not suitable, but when I add -O2,
-O3, or -Os to compile it, then the fault is gone. I also test clang-3.8, and
it has the same results.</pre>
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