This seems to be due to a zfs regression when running fallocate, causing mysql's initialization to produce an ib_logfile1 of size 0:
1893 fallocate(3, FALLOC_FL_ZERO_RANGE, 0, 50331648) = 0
This seems to be due to a zfs regression when running fallocate, causing mysql's initialization to produce an ib_logfile1 of size 0:
1893 fallocate(3, FALLOC_ FL_ZERO_ RANGE, 0, 50331648) = 0