Range issue

rng.nim

type TSomeRange = object
  hour: range[0..23]

var value: string

#Works
var val6 = TSomeRange(hour: 6)
value = $(if val6.hour > 12: val6.hour - 12 else: val6.hour)
echo value

var val14 = TSomeRange(hour: 14)
value = $(if val14.hour > 12: val14.hour - 12 else: val14.hour)
echo value

#With 12, works
var val12 = TSomeRange(hour: 12)
if val12.hour > 12: value = $(val12.hour - 12) else: value = $val12.hour
echo value

#Crashes
value = $(if val12.hour > 12: val12.hour - 12 else: val12.hour)
echo value