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!