https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125537
--- Comment #2 from Wang Jinghao <zheng.xianyuwang at gmail dot com> --- Created attachment 65265 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65265&action=edit a simple fix Return type deduction only needs to be deferred when a result-name-introducer is used.
