Assertion `status == 0' failed in add_role_user_mapping_action

create role r1;

create role r2;

grant r2 to r1;

drop role r1;

create user foo;

10.1/sql/sql_acl.cc:2610: my_bool add_role_user_mapping_action(void*, void*): Assertion `status == 0' failed.

150518 17:05:18 [ERROR] mysqld got signal 6 ;

#6  0x00007fa9bcd89311 in *__GI___assert_fail (assertion=0x7fa9bffec7ce "status == 0", file=<optimized out>, line=2610, function=0x7fa9bffefee0 "my_bool add_role_user_mapping_action(void*, void*)") at assert.c:81

#7  0x00007fa9bf6315c9 in add_role_user_mapping_action (ptr=0x7fa9b5ded8c0, unused=0x0) at 10.1/sql/sql_acl.cc:2610

#8  0x00007fa9bff156e6 in my_hash_iterate (hash=0x7fa9c09c6a00, action=0x7fa9bf631567 <add_role_user_mapping_action(void*, void*)>, argument=0x0) at 10.1/mysys/hash.c:761

#9  0x00007fa9bf631675 in rebuild_role_grants () at 10.1/sql/sql_acl.cc:2635

#10 0x00007fa9bf630700 in acl_insert_user (user=0x7fa9b38e4118 "foo", host=0x7fa9bffebc4b "%", password=0x7fa9c00035a0 "", password_len=0, ssl_type=SSL_TYPE_NOT_SPECIFIED, ssl_cipher=0x0, x509_issuer=0x0, x509_subject=0x0, mqh=0x7fa9b5e5ff18, privileges=0, plugin=0x7fa9b38e4150, auth=0x7fa9b38e4160) at 10.1/sql/sql_acl.cc:2271

#11 0x00007fa9bf63574c in replace_user_table (thd=0x7fa9b5e5b070, table=0x7fa9bc4df870, combo=..., rights=0, revoke_grant=false, can_create_user=true, no_auto_create=false) at 10.1/sql/sql_acl.cc:3626

#12 0x00007fa9bf646d53 in mysql_create_user (thd=0x7fa9b5e5b070, list=..., handle_as_role=false) at 10.1/sql/sql_acl.cc:9435

#13 0x00007fa9bf6c52d9 in mysql_execute_command (thd=0x7fa9b5e5b070) at 10.1/sql/sql_parse.cc:4547

#14 0x00007fa9bf6cd234 in mysql_parse (thd=0x7fa9b5e5b070, rawbuf=0x7fa9b38e4088 "create user foo", length=15, parser_state=0x7fa9bf16a1b0) at 10.1/sql/sql_parse.cc:7161

#15 0x00007fa9bf6bc1e1 in dispatch_command (command=COM_QUERY, thd=0x7fa9b5e5b070, packet=0x7fa9b8bf6071 "create user foo", packet_length=15) at 10.1/sql/sql_parse.cc:1462

#16 0x00007fa9bf6bafb1 in do_command (thd=0x7fa9b5e5b070) at 10.1/sql/sql_parse.cc:1090

#17 0x00007fa9bf7eccb3 in do_handle_one_connection (thd_arg=0x7fa9b5e5b070) at 10.1/sql/sql_connect.cc:1347

#18 0x00007fa9bf7ec9f8 in handle_one_connection (arg=0x7fa9b5e5b070) at 10.1/sql/sql_connect.cc:1258

#19 0x00007fa9bfda608e in pfs_spawn_thread (arg=0x7fa9bc4235f0) at 10.1/storage/perfschema/pfs.cc:1860

#20 0x00007fa9beda4b50 in start_thread (arg=<optimized out>) at pthread_create.c:304

#21 0x00007fa9bce3995d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112