[Bug debug/69785] c++filt can't demangle string or compiler produce wrong mangled string

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69785

--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
libcxxabi demangler doesn't handle any of the strings, too.