[Bug libstdc++/84865] Regular expression regex_search falls into infinite loop causing segfault on crayxc machines

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84865

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Are you sure it's an infinite loop? It looks like a null pointer dereference:

0x0000000000403f64 in std::_Any_data::_M_access (this=0x0)