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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Analyzer fails to account for constructor initialization"
href="https://bugs.llvm.org/show_bug.cgi?id=45120">45120</a>
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<th>Summary</th>
<td>Analyzer fails to account for constructor initialization
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Static Analyzer
</td>
</tr>
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<th>Assignee</th>
<td>dcoughlin@apple.com
</td>
</tr>
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<th>Reporter</th>
<td>llvm-dev@redking.me.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>dcoughlin@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre><a href="https://llvm.org/reports/scan-build/report-DeclTemplate.cpp-TemplateParameterList-27-1.html#EndPath">https://llvm.org/reports/scan-build/report-DeclTemplate.cpp-TemplateParameterList-27-1.html#EndPath</a>
TemplateParameterList::TemplateParameterList(const ASTContext& C,
SourceLocation TemplateLoc,
SourceLocation LAngleLoc,
ArrayRef<NamedDecl *> Params,
SourceLocation RAngleLoc,
Expr *RequiresClause)
: TemplateLoc(TemplateLoc), LAngleLoc(LAngleLoc), RAngleLoc(RAngleLoc),
NumParams(Params.size()), ContainsUnexpandedParameterPack(false),
HasRequiresClause(RequiresClause != nullptr),
HasConstrainedParameters(false) {
........
if (HasRequiresClause) {
if (RequiresClause->containsUnexpandedParameterPack())
ContainsUnexpandedParameterPack = true;
*getTrailingObjects<Expr *>() = RequiresClause;
}
}
The static analyzer is warning about a null pointer dereference for
RequiresClause, but we will only reach this code if HasRequiresClause is true,
which is set by a non-null RequiresClause value in the initializer list at the
top of the constructor.</pre>
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