1 files changed, 5 insertions, 7 deletions

diff --git a/sql/sql_db.cc b/sql/sql_db.cc
index 70b1d1d0d3a..697859eb264 100644
--- a/sql/sql_db.cc
+++ b/sql/sql_db.cc
@@ -270,11 +270,8 @@ int mysql_alter_db(THD *thd, const char *db, HA_CREATE_INFO *create_info)
   VOID(pthread_mutex_lock(&LOCK_mysql_create_db));
 
   // do not alter database if another thread is holding read lock
-  if (wait_if_global_read_lock(thd,0))
-  {
-    error= -1;
+  if ((error=wait_if_global_read_lock(thd,0)))
     goto exit2;
-  }
 
   /* Check directory */
   (void)sprintf(path,"%s/%s/%s", mysql_data_home, db, MY_DB_OPT_FILE);
@@ -307,7 +304,7 @@ exit:
   start_waiting_global_read_lock(thd);
 exit2:
   VOID(pthread_mutex_unlock(&LOCK_mysql_create_db));
-  DBUG_RETURN(error);
+  DBUG_RETURN(error ? -1 : 0); /* -1 to delegate send_error() */
 }
 
 
@@ -411,7 +408,7 @@ exit:
     when the slave is replicating a DROP DATABASE: 
     - garbage characters in the error message:
     "Error 'Can't drop database 'test2'; database doesn't exist' on query
-    'h4zIż'"
+    'h4zI©'"
     - segfault
     - hang in "free(vio)" (yes!) in the I/O or SQL slave threads (so slave
     server hangs at shutdown etc).
@@ -420,7 +417,8 @@ exit:
   {
     if (!(thd->slave_thread)) /* a slave thread will free it itself */
       x_free(thd->db);
-    thd->db= 0; 
+    thd->db= 0;
+    thd->db_length= 0;
   }
 exit2:
   VOID(pthread_mutex_unlock(&LOCK_mysql_create_db));