Floats can't become NaN or Infinity

Divide by zero in JavaScript or Python and you get back a poisoned value, Infinity or NaN, that silently corrupts every computation it touches downstream. Ascent refuses to create one at all: the operation crashes instead.

1.0 / 0.0

Run it, then change 1.0 to 0.0 and run it again. You get the same crash either way, even though one would be Infinity elsewhere and the other NaN.