T5837.hs:8:6: Context reduction stack overflow; size = 51 Use -fcontext-stack=N to increase stack size to N (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF a)))))))))))))))))))))))))))))))))))))))))))))))))), TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF Int))))))))))))))))))))))))))))))))))))))))))))))))))) ~ TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF (TF a)))))))))))))))))))))))))))))))))))))))))))))))))