The assert

# Internal Error (/opt/jprt/T/P1/211148.vlivanov/s/hotspot/src/share/vm/opto/memnode.cpp:1612), pid=19848, tid=19918
# assert(!is_mismatched_access(con, loadbt)) failed: conbt=byte; loadbt=int

was triggered in the nightly testing of 2016-02-29. The failing assert was added by JDK-8150543. The nightly run was using the binary from the JPRT job used to push JDK-8150543.