[Bug c++/106689] gcc crash while compiling a generic lambda

[janezz55 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106689

--- Comment #5 from Janez Zemva <janezz55 at gmail dot com> ---
The workaround is very simple, just put "[&]() noexcept -> bool" into sq2.hpp.