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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - crash on bad default argument"
href="http://llvm.org/bugs/show_bug.cgi?id=20962">20962</a>
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<th>Summary</th>
<td>crash on bad default argument
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>richard-llvm@metafoo.co.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>This causes clang to crash:
template<typename T> struct S { void f(int k = g(k)()); };
void x() { S<int>().f(); }
The interesting part of the backtrace:
7 clang-3.5 0x0000000003645f04
clang::Sema::CheckImplicitConversions(clang::Expr*, clang::SourceLocation) +
132
8 clang-3.5 0x0000000003646812
clang::Sema::CheckCompletedExpr(clang::Expr*, clang::SourceLocation, bool) + 66
9 clang-3.5 0x000000000382b215
clang::Sema::BuildCXXDefaultArgExpr(clang::SourceLocation,
clang::FunctionDecl*, clang::ParmVarDecl*) + 1253
We're presumably calling CheckCompletedExpr on a null expression.</pre>
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</p>
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