Big numbers (1e24) + `pTrace` in JS mode result in an `UnknownError(Loc(1, 0, 1))`

[brekk]

Ostensibly I'm hitting a range limit, but:

import IO from "IO"



e12 = 1000000000000
reale24 = e12 * e12

main = () => {
  IO.pTrace("e12", e12)
  IO.pTrace("reale24", reale24)
}

Prints:

e12 1000000000000
reale24 UnknownError(Loc(1, 0, 1))

I'd expect a warning if I exceed a number limit (if that is indeed the error I'm seeing)

☝️ This is specific to JS mode.

With -t llvm on, it correctly prints:

e12 1000000000000
reale24 2003764205206896640