[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