How to debug a non-deterministic StackOverflowError?

[Tamas_Papp]

@jules

how can the error appear only sometimes if I have exactly the same testset every time? Many times it runs fine

Understanding Dict

Hi everyone. I am coming from python background. In python, dictionary keys cannot be mutable because it is based on hash table. However, keys in Dict in julia do not need to be immutable. I wonder how this is achieved?