Comment 10 for bug 1204871

My previous comment is wrong as I failed to consider MyISAM, which is tested in this RQG setup, and this indeed appears to be upstream 71270 in combination with too small myisam_sort_buffer_size.

2013-07-20 15:52:08 17093 [Warning] Warning: Enabling keys got errno 137 on query018293.t1, retrying
2013-07-20 15:52:08 17093 [Warning] Warning: Enabling keys got errno 137 on query018293.t1, retrying
2013-07-20 15:52:08 17093 [Warning] Warning: Enabling keys got errno 137 on query018293.t1, retrying
2013-07-20 15:52:08 17093 [Warning] Warning: Enabling keys got errno 137 on query018293.t1, retrying
2013-07-20 15:52:08 17093 [Warning] Warning: Enabling keys got errno 137 on query018293.t1, retrying
2013-07-20 15:52:08 17093 [Warning] Warning: Enabling keys got errno 137 on query018293.t1, retrying
2013-07-20 15:52:08 17093 [Warning] Warning: Enabling keys got errno 137 on query018293.t1, retrying
2013-07-20 15:52:08 17093 [Warning] Warning: Enabling keys got errno 137 on query018293.t1, retrying
2013-07-20 15:52:08 17093 [Warning] Warning: Enabling keys got errno 137 on query018293.t1, retrying
mysqld: /bzr/5.6_val/Percona-Server-5.6.12-rc60.4/sql/ha_partition.cc:4438: virtual int ha_partition::end_bulk_insert(): Assertion `0' failed.

which is consistent with MyISAM end bulk insert implementation:

int ha_myisam::end_bulk_insert()
{
...
      if (((err= enable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE)) != 0) &&
                                                  current_thd->killed)
...
  return err;
}

returning handler error and hitting 71270.