The condition was checked before in_loop, outside the diff that catches a
loop giving away what the next iteration needs. Emit puts the condition in
the loop header, so it runs again every trip: a condition that frees a
local freed it once per trip. It is now diffed against the same dead set,
with its own reason. A dotimes count and a loop's initial values stay
outside: those are evaluated exactly once.
Joseph Ferano
c31feb85eb