https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101367
Bug ID: 101367
Summary: [coroutines] destructor for capture in lambda
temporary operand to co_yield expression called twice
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: noah at vectorized dot io
Target Milestone: ---
I'm observing an issue in which it appears that the destructor for a captured
object in a lambda which is passed as a temporary to a co_await/co_yield
expression is being called twice.
Here is a reproducer https://godbolt.org/z/8jrGx7qsT which is a slight
modification of the reproducer used in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95599 that was related to the
order of destructors in co_await/co_yield expressions.
In the reproducer I gave when the lambda temporary doesn't capture a
std::string value things work, but when it does you can see that gcc reports
`free(): invalid pointer`.
It also appears that https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100611 may be
closely related.
