Not sure if this is a bug or if I'm doing something wrong, but my recursive generator will occasionally throw this exception:
It seems the resize function is being called with a non-integer value, which appears incorrect to my admittedly untrained eyes. It seems to originate from the call to (Math/pow size (/ 1 height)) that is used to initialize children-size on line 1337 of generators.cljc. Wrapping it in a call to long appears to fix the issue.
Sounds straightforward; thanks for the report.
Actually I think this is already fixed on master; let me know if you disagree.