Warring islands. Boxed in by the forest without access to the coast on this map - seed 5a2bda21
Just had to chop down a few trees to rectify this, but still I don’t think this should occur.
It sounds fun. 
20crt
Thank you for reporting @karthikriyer! What size map were you playing on? What biome?
I am sorry, the game seems to have been patched after that. I am unable to run the replay to check.