error: "Label1" is not a macro
    at lexer-hack.asm(22)
error: 'mac' already defined
    at lexer-hack.asm(24)
    and also:
    at lexer-hack.asm(1)
error: Undefined macro "undef"
    at lexer-hack.asm(27)
error: Undefined macro "undef"
    at lexer-hack.asm(28)
Assembly aborted with 4 errors!