[Bug libstdc++/70459] regex segfault on long sequences

[chaoskeeper at mail dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70459

--- Comment #1 from chaoskeeper at mail dot ru ---
Created attachment 38132
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38132&action=edit
Minimal test case