https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81139
--- Comment #1 from Tom Honermann <tom at honermann dot net> --- Bug 69448 appears to be related.
- [Bug c++/81139] New: Non-deduced return t... andrew.n.sutton at gmail dot com
- [Bug c++/81139] Non-deduced return t... redi at gcc dot gnu.org
- [Bug c++/81139] Non-deduced return t... tom at honermann dot net
