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!