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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - -Wdangling-gsl only warns on initialization and not on assignment"
href="https://bugs.llvm.org/show_bug.cgi?id=47640">47640</a>
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<th>Summary</th>
<td>-Wdangling-gsl only warns on initialization and not on assignment
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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
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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
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<th>Component</th>
<td>Frontend
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>rtrieu@google.com
</td>
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<th>CC</th>
<td>gribozavr@gmail.com, llvm-bugs@lists.llvm.org, m.gehre@gmx.de, neeilans@live.com, richard-llvm@metafoo.co.uk, xazax.hun@gmail.com
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<p>
<div>
<pre>-Wdangling-gsl is a warning that catches dangling pointers. This warning
catches a lot of lifetime bugs, but it only does so during initialization.
Similar code that causes a dangling pointer during assignments does not get a
warning.
#include <string>
#include <string_view>
#include <memory>
std::string get_string();
std::unique_ptr<int> get_int();
int main() {
std::string_view sv = get_string(); // Warning on initialization
sv = get_string(); // No warning on assignment
int *p = get_int().get(); // Warning on initialization
p = get_int().get(); // No warning on assignment
}</pre>
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</p>
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