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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang::DominatorTree::buildDominatorTree crashes for codes with infinite while loops"
href="https://bugs.llvm.org/show_bug.cgi?id=40187">40187</a>
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<th>Summary</th>
<td>clang::DominatorTree::buildDominatorTree crashes for codes with infinite while loops
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>7.0
</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>
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<th>Priority</th>
<td>P
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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>aadi.naik@gmail.com
</td>
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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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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21281" name="attach_21281" title="A tar of the folder containing the RAV code as well as some test cases">attachment 21281</a> <a href="attachment.cgi?id=21281&action=edit" title="A tar of the folder containing the RAV code as well as some test cases">[details]</a></span>
A tar of the folder containing the RAV code as well as some test cases
The buildDominatorTree function gives a segmentation fault when trying to build
a dominator tree within a RecursiveASTVisitor Visit function for a code
containing an infinite loop (specifically where the condition is 1) like this
code-
int main() {
int x, y, z;
x = 10;
while(1) {
x++;
if(x == 100) {
break;
}
}
return 0;
}
Assigning the value 1 to a variable and using the variable as a condition does
not cause an issue-
int main() {
int x, y, z;
x = 10;
y = 1;
while(y) {
x++;
if(x == 100) {
break;
}
}
return 0;
}
The code for reproducing the error as well as the test cases are in the tar
file
Found when using Clang 7 and LLVM 7 installed from the Debian packages</pre>
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