sql/ha_blackhole.cc

    bug#10175 - blackhole.test hangs with "Warning: prev link 1 didn't point at previous lock at read: read lock with no write locks"
sql/sql_base.cc
    libmysqld/examples/mysql.cc linking problem

sql/ha_blackhole.cc

@@ -129,8 +129,9 @@ THR_LOCK_DATA **ha_blackhole::store_lock(THD *thd,
                                          THR_LOCK_DATA **to,
                                          enum thr_lock_type lock_type)
 {
+  if (lock_type != TL_IGNORE && lock.type == TL_UNLOCK)
+    lock.type=lock_type;
   *to++= &lock;
-
   return to;
 }
 

sql/sql_base.cc

@@ -2522,7 +2522,7 @@ bool get_key_map_from_key_list(key_map *map, TABLE *table,
     if ((pos= find_type(&table->keynames, name->ptr(), name->length(), 1)) <=
 	0)
     {
-      my_error(ER_KEY_COLUMN_DOES_NOT_EXITS, MYF(0), name->c_ptr(),
+      my_error(ER_KEY_COLUMN_DOES_NOT_EXITS, MYF(0), name->c_ptr_safe(),
 	       table->real_name);
       map->set_all();
       return 1;