Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
your function
listen()clashes with POSIX'slisten(). Criterion is probably usinglisten()somewhere for inter-process communication and calls your function instead, leading to a crash. Rename it, and your code will pass.