https://bugs.llvm.org/show_bug.cgi?id=52136
Bug ID: 52136
Summary: [coroutine] undefined behavior when nested lambda
coroutine captures automatic variables by reference
Product: clang
Version: 12.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++2a
Assignee: unassignedclangb...@nondot.org
Reporter: bhal...@gmail.com
CC: blitzrak...@gmail.com, erik.pilking...@gmail.com,
llvm-bugs@lists.llvm.org, richard-l...@metafoo.co.uk
Reproducer: https://godbolt.org/z/3d37ME161
Since clang 12.0.0 through to current trunk.
Coroutine foo instantiates a coroutine lambda.
When references to automatic variable are passed to the lambda coroutine as
arguments, all is well.
However, when the lambda captures the local variables by reference they seem to
go out of scope and referring to them in the lambda results in undefined
behavior.
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