Parsing of large (>32-bit) integer constants
Because we use 32-bit Clean, large integer constants cannot be stored correctly. This causes problems like:
![2020-12-12-160812_352x62](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
-1
should be 9223372036854775807
, but this value is too large to be parsed by the 32-bit Clean compiler.