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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang-analyzer-cplusplus.NewDelete false-positive - does not note nullification of ptr after delete"
href="https://bugs.llvm.org/show_bug.cgi?id=44050">44050</a>
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<th>Summary</th>
<td>clang-analyzer-cplusplus.NewDelete false-positive - does not note nullification of ptr after delete
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Static Analyzer
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<th>Assignee</th>
<td>dcoughlin@apple.com
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<th>Reporter</th>
<td>lebedev.ri@gmail.com
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<th>CC</th>
<td>dcoughlin@apple.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>This is manually reduced from a report that i got via CTU mode (yay).
The issue appears to be false-positive:
struct S {
int *storage;
~S() {
if(!storage)
return;
delete storage; // <- we can't
storage = nullptr;
}
};
S producer();
S foo() {
S imm = producer();
return imm;
}
S bar() {
S imm = foo();
return imm;
}
warning: Attempt to free released memory [clang-analyzer-cplusplus.NewDelete]
delete storage;
^
But how can that happen, after deleting we set it to nullptr?
<a href="https://godbolt.org/z/Jkusgy">https://godbolt.org/z/Jkusgy</a></pre>
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