https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105565
--- Comment #5 from Patrick Palka <ppalka at gcc dot gnu.org> --- I suspect the changes to cxx_eval_call_expression and/or cxx_eval_constant_expression caused these functions to use more stack space per recursive call, and this marginal increase was enough to overflow the stack during constexpr evaluation for this testcase.
