error: syntax error, unexpected local label, expecting symbol
    at label-macro-arg.asm::test_char(25) <- label-macro-arg.asm(38)
    while expanding symbol "VAR_DEF"
error: syntax error, unexpected local label, expecting symbol
    at label-macro-arg.asm::test_char(26) <- label-macro-arg.asm(38)
error: Interpolated symbol "sizeof_.something" does not exist
    at label-macro-arg.asm::test_char(29) <- label-macro-arg.asm(38)
error: syntax error, unexpected label, expecting symbol
    at label-macro-arg.asm::test_char(25) <- label-macro-arg.asm(39)
    while expanding symbol "VAR_DEF"
error: syntax error, unexpected label, expecting symbol
    at label-macro-arg.asm::test_char(26) <- label-macro-arg.asm(39)
error: Invalid format spec 'sizeof_'
    at label-macro-arg.asm::test_char(29) <- label-macro-arg.asm(39)
error: Interpolated symbol "something" does not exist
    at label-macro-arg.asm::test_char(29) <- label-macro-arg.asm(39)
Assembly aborted with 7 errors!