[Bug demangler/106224] stack-overflow rust-demangle.c:90/99/110/111/670/689, as demonstrated by cxxfilt

[13579and24680 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106224

--- Comment #1 from 曾思維 <13579and24680 at gmail dot com> ---
(-r is enough to trigger it)
$ ./binutils/cxxfilt -r < poc00