Slave crashes on attempt to do parallel replication from an older master

#2  0x0000000000858e09 in handle_fatal_signal (sig=11) at   10.0/sql/signal_handler.cc:262

#3  <signal handler called>

#4  0x00000000007e74b5 in handle_rpl_parallel_thread (arg=0x7feae4ca8930) at   10.0/sql/rpl_parallel.cc:283

#5  0x0000000000a2c22d in pfs_spawn_thread (arg=0x7feac73cbe90) at   10.0/storage/perfschema/pfs.cc:1853

#6  0x00007feae73beb50 in start_thread (arg=<optimized out>) at pthread_create.c:304

#7  0x00007feae58c9a7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

revision-id: bar@mnogosearch.org-20140227154400-3rs1m2c47lqum7js

revno: 4014

branch-nick: 10.0