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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - 'Segmentation fault: 11' in the special index for an array"
href="https://bugs.llvm.org/show_bug.cgi?id=44975">44975</a>
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<th>Summary</th>
<td>'Segmentation fault: 11' in the special index for an array
</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
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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
</td>
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>haoxintu@gmail.com
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<div>
<pre>Hi, I am developing a random c generation tool to find c compiler bugs.
I found an interesting code that compiles successfully but get a "Segmentation
fault:11" result when executing it.
The c code is
void foo(int* a ) {
a[8]=1;
}
int main (int argc, char* argv[]) {
int array[] = {0};
foo(array);
return 0;
}
My compile command is "clang-6.0 test.cc" and it succeeds. Then I execute it
using "./a.out" but I got a "Segmentation fault:11" error.
I know we should initialize an array before using it. But the most interesting
thing is that only an index of 8 in a array can trigger the error, other index
is fine for execution.
I test the code in clang-3.8, clang-6.0, clang-7 in ubuntu16.04 and got the
same error.</pre>
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