division-by-zero
A number or a time was divided by zero.
divided by needs a divisor that is not 0 and not 0s. math.Remainder of a by b has the same rule for b. The run stops at the division, because the result would not be a number.
Example
Run this program to see the diagnostic.
# package main
use std/sim
define main
sim.StopAt (1s divided by 0)
Diagnostic
failed at 0s: p/main.synod:5:15: error[division-by-zero]: division by zero
Fix
Divide by a number that is not zero.
# package main
use std/sim
define main
sim.StopAt (1s divided by 2)