Merge mysql.com:/home/ram/work/b29420/b29420.5.0

into  mysql.com:/home/ram/work/b29420/b29420.5.1

mysql-test/suite/rpl/r/rpl_rotate_logs.result

@@ -203,3 +203,11 @@ count(*)
 100
 unlock tables;
 drop table if exists t1,t2,t3,t4;
+End of 4.1 tests
+show binlog events in 'non existing_binlog_file';
+ERROR HY000: Error when executing command SHOW BINLOG EVENTS: Could not find target log
+purge master logs before now();
+show binlog events in '';
+ERROR HY000: Error when executing command SHOW BINLOG EVENTS: Could not find target log
+purge master logs before now();
+End of 5.0 tests

mysql-test/suite/rpl/t/rpl_rotate_logs.test

@@ -166,4 +166,16 @@ connection master;
 drop table if exists t1,t2,t3,t4;
 sync_slave_with_master;
 
-# End of 4.1 tests
+--echo End of 4.1 tests
+
+#
+# Bug #29420: crash with show and purge binlogs
+#
+--error 1220
+show binlog events in 'non existing_binlog_file';
+purge master logs before now();
+--error 1220
+show binlog events in '';
+purge master logs before now();
+
+--echo End of 5.0 tests

sql/sql_repl.cc

@@ -1442,13 +1442,11 @@ bool mysql_show_binlog_events(THD* thd)
   }
 
   if (errmsg)
-  {
     my_error(ER_ERROR_WHEN_EXECUTING_COMMAND, MYF(0),
              "SHOW BINLOG EVENTS", errmsg);
-    DBUG_RETURN(TRUE);
-  }
-
+  else
     send_eof(thd);
+
   pthread_mutex_lock(&LOCK_thread_count);
   thd->current_linfo = 0;
   pthread_mutex_unlock(&LOCK_thread_count);