[Bug libstdc++/96345] __cxa demangle fails to demangle a very long string

[hededrk at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96345

--- Comment #1 from V <hededrk at gmail dot com> ---
Created attachment 48936
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48936&action=edit
failing example