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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Block destructor calls destructor on variable captured by reference"
href="https://bugs.llvm.org/show_bug.cgi?id=40330">40330</a>
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<th>Summary</th>
<td>Block destructor calls destructor on variable captured by reference
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>Macintosh
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<th>OS</th>
<td>MacOS X
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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>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>sebastian@theophil.net
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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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<pre>Created <span class=""><a href="attachment.cgi?id=21335" name="attach_21335" title="Reproduction">attachment 21335</a> <a href="attachment.cgi?id=21335&action=edit" title="Reproduction">[details]</a></span>
Reproduction
In the attached reproduction,
- I create an object T on the stack,
- then capture this object by reference in a lambda
- and in the lambda create a block that again captures this t by reference.
This seems correct so far because at the point of creation, object T is a
reference.
Then I convert the (stack allocated) block to a heap allocated block using
_Block_copy and release it using _Block_release. This tries to call the
destructor on the reference to T, which seems to be a bug.
The bug occurs on the latest version of clang for Xcode which reports itself as
Apple LLVM version 10.0.0 (clang-1000.11.45.2)</pre>
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