ReferenceError: dummy is not defined

[squatica]

Not sure if this is happening in every level, I experienced it in level 13 RobotMaze:

Whenever I use a while loop, I get an ReferenceError: dummy is not defined

Minimal failing example:

var i = 5;
while (i--) {}

I tracked it down to https://github.com/AlexNisnevich/untrusted/blob/master/scripts/validate.js#L39 I believe it needs a var.

Global variables are apparently not allowed, this code fails with ReferenceError: i is not defined:

i = 5;

When I put a var dummy; somewhere in my code it complains about one more variable - startTime, but then with var dummy, startTime; it works fine.

Passing:

var dummy, startTime;
var i = 5;
while (i--) {}

Confirmed same behavior also on the BFS solution from Yuval (well that one needs one more var in front of new_moves).