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# # MDEV-5405 RQG induced crash in mi_assign_to_key_cache in safe mutex unlock # --source include/have_debug_sync.inc create table t1 (f int, key(f)) engine=myisam; set global kc1.key_buffer_size = 65536; connect (con1, localhost, root); set debug_sync='assign_key_cache_op_unlock wait_for op_locked'; send cache index t1 in kc1; connection default; sleep 1; set debug_sync='assign_key_cache_op_lock signal op_locked wait_for assigned'; send cache index t1 in kc1; connection con1; reap; set debug_sync='now signal assigned'; disconnect con1; connection default; reap; drop table t1; set global kc1.key_buffer_size = 0; set debug_sync='reset';