https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95517
--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> --- (In reply to mengjun wei from comment #4) > GCC 11.2 no longer allow return_value and return_void be both defined, may > this restriction be removed? The restriction is part of the C++ standard (for the record, there was discussion about allowing both to be present, but that was rejected by the committee). https://eel.is/c++draft/dcl.fct.def.coroutine#6 So, we cannot remove the restriction.
