Merge bk-internal:/home/bk/mysql-5.1-new

into  xiphis.org:/home/acurtis/mysql-5.1-merge

mysql-test/extra/binlog_tests/blackhole.test

@@ -147,3 +147,15 @@ set autocommit=1;
 --replace_column 2 # 5 #
 --replace_regex /table_id: [0-9]+/table_id: #/
 show binlog events;
+
+#
+# BUG#10952 - alter table ... lost data without errors and warnings
+#
+drop table if exists t1;
+create table t1 (c char(20)) engine=MyISAM;
+insert into t1 values ("Monty"),("WAX"),("Walrus");
+--error 1031
+alter table t1 engine=blackhole;
+drop table t1;
+
+# End of 5.0 tests