
Emily C. answered 05/23/21
Hobbyist Godot Developer
Someone's already provided a very long answer to this, so I'll provide a short (and possibly oversimplified) one:
A stack overflow occurs when your recursive function never stops calling itself. Imagine, for instance, a recursive search function for a binary tree which has mistakenly been set to search from the root node rather than progressing further down the tree. It will continue calling itself with the same argument (the root node) over and over until the computer hits its limit for keeping track of all the times you've called that function.