https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68151
--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fort...@t-online.de> --- Or depending on used compiler options : $ cat z3.f90 program p real :: z integer :: k = 1 select case (k) case (:huge(z)) end select end $ gfortran -fdefault-real-8 z3.f90 f951: internal compiler error: gfc_trans_select(): Bad type for case expr. --- Analogous with complex : $ cat z4.f90 program p integer :: k = 1 select case (k) case (cmplx(1):) end select end $ gfortran -fdefault-real-8 z4.f90 f951: internal compiler error: gfc_trans_select(): Bad type for case expr.