Infinite loop when both arguments have cycles #19
Description
If both arguments have cycles, like if you're trying to compare doubly-linked lists, dequal goes into an infinite loop.
repro:
const a: any = {}, b: any = {};
a.next = b;
b.previous = a;
const c: any = {}, d: any = {};
c.next = d;
d.previous = c;
dequal(a, c);