[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] fact opcode fail function fast core fatal signals filehandle find_global opcode find_lex opcode 2nd 3rd find_method opcode find_type opcode flattening list context flow control construct in PIR for loop formal parameters freedom, principle of |