[Bug c++/78564] cp-demangle fails to decode Ul+auto/anon

[jengelh at inai dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78564

--- Comment #1 from Jan Engelhardt <jengelh at inai dot de> ---
crosslink https://sourceware.org/bugzilla/show_bug.cgi?id=20873