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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - False positive for clang static analyzer checker optin.cplusplus.UninitializedObject"
href="https://bugs.llvm.org/show_bug.cgi?id=51316">51316</a>
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<th>Summary</th>
<td>False positive for clang static analyzer checker optin.cplusplus.UninitializedObject
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</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>enhancement
</td>
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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
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<th>Reporter</th>
<td>smallcsf@yandex.ru
</td>
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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>
<div>
<pre>Checker UninitializedObject is enable by default in clang-tidy and reports
some false positives. Tests case(UninitializedObjectChecker_false_positive.cpp)
:
-----------------------------------------
struct Operand_ {
int e;
int a[2];
};
class b : Operand_ {
public:
b() : Operand_{ 1, { 2, 3 }} {}
};
void c() { b(); }
-----------------------------------------
It returns wrong warning:
-----------------------------------------
UninitializedObjectChecker_false_positive.cpp:9:17: warning: 1 uninitialized
field at the end of the constructor call [optin.cplusplus.UninitializedObject]
b() : Operand_{ 1, { 2, 3 }} {}
^~~~~~~~~~~~~~
UninitializedObjectChecker_false_positive.cpp:3:7: note: uninitialized field
'this->Operand_::e'
int e;
^
1 warning generated.
-----------------------------------------
Arguments for clang-12 or clangs-13 in trunk:
-----------------------------------------
clang-12 -c UninitializedObjectChecker_false_positive.cpp -Xclang
-analyzer-checker=optin.cplusplus.UninitializedObject -Xclang -analyze
-----------------------------------------</pre>
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