https://bugs.llvm.org/show_bug.cgi?id=40330
Bug ID: 40330
Summary: Block destructor calls destructor on variable captured
by reference
Product: clang
Version: unspecified
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: sebast...@theophil.net
CC: blitzrak...@gmail.com, dgre...@apple.com,
erik.pilking...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
Created attachment 21335
--> https://bugs.llvm.org/attachment.cgi?id=21335&action=edit
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)
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