diff --git a/mysql-test/r/fulltext.result b/mysql-test/r/fulltext.result
index 02b115cb6dc..96ebb9bf254 100644
--- a/mysql-test/r/fulltext.result
+++ b/mysql-test/r/fulltext.result
@@ -476,16 +476,15 @@ ALTER TABLE t1 DISABLE KEYS;
 SELECT * FROM t1 WHERE MATCH(a) AGAINST('test');
 ERROR HY000: Can't find FULLTEXT index matching the column list
 DROP TABLE t1;
-CREATE TABLE t1(a VARCHAR(2) CHARACTER SET big5 COLLATE big5_chinese_ci,
-FULLTEXT(a));
-INSERT INTO t1 VALUES(0xA3C2);
-DROP TABLE t1;
 CREATE TABLE t1(a VARCHAR(20), FULLTEXT(a));
 INSERT INTO t1 VALUES('Offside'),('City Of God');
 SELECT a FROM t1 WHERE MATCH a AGAINST ('+city of*' IN BOOLEAN MODE);
 a
 City Of God
-SELECT a FROM t1 WHERE MATCH a AGAINST ('+city (of)*' IN BOOLEAN MODE);
+SELECT a FROM t1 WHERE MATCH a AGAINST ('+city (of*)' IN BOOLEAN MODE);
+a
+City Of God
+SELECT a FROM t1 WHERE MATCH a AGAINST ('+city* of*' IN BOOLEAN MODE);
 a
 City Of God
 DROP TABLE t1;
diff --git a/mysql-test/r/fulltext3.result b/mysql-test/r/fulltext3.result
index 019d5f472ed..4ec48369ad1 100644
--- a/mysql-test/r/fulltext3.result
+++ b/mysql-test/r/fulltext3.result
@@ -11,3 +11,7 @@ Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 SET NAMES latin1;
 DROP TABLE t1;
+CREATE TABLE t1(a VARCHAR(2) CHARACTER SET big5 COLLATE big5_chinese_ci,
+FULLTEXT(a));
+INSERT INTO t1 VALUES(0xA3C2);
+DROP TABLE t1;
diff --git a/mysql-test/t/fulltext.test b/mysql-test/t/fulltext.test
index b1bf0036c70..1f8a3b82cfd 100644
--- a/mysql-test/t/fulltext.test
+++ b/mysql-test/t/fulltext.test
@@ -399,22 +399,14 @@ ALTER TABLE t1 DISABLE KEYS;
 SELECT * FROM t1 WHERE MATCH(a) AGAINST('test');
 DROP TABLE t1;
 
-#
-# BUG#29464 - load data infile into table with big5 chinese fulltext index
-#             hangs 100% cpu
-#
-CREATE TABLE t1(a VARCHAR(2) CHARACTER SET big5 COLLATE big5_chinese_ci,
-FULLTEXT(a));
-INSERT INTO t1 VALUES(0xA3C2);
-DROP TABLE t1;
-
 #
 # BUG#29445 - match ... against () never returns
 #
 CREATE TABLE t1(a VARCHAR(20), FULLTEXT(a));
 INSERT INTO t1 VALUES('Offside'),('City Of God');
 SELECT a FROM t1 WHERE MATCH a AGAINST ('+city of*' IN BOOLEAN MODE);
-SELECT a FROM t1 WHERE MATCH a AGAINST ('+city (of)*' IN BOOLEAN MODE);
+SELECT a FROM t1 WHERE MATCH a AGAINST ('+city (of*)' IN BOOLEAN MODE);
+SELECT a FROM t1 WHERE MATCH a AGAINST ('+city* of*' IN BOOLEAN MODE);
 DROP TABLE t1;
 
 # End of 4.1 tests
diff --git a/mysql-test/t/fulltext3.test b/mysql-test/t/fulltext3.test
index a57fd48daaa..1b6a07c540f 100644
--- a/mysql-test/t/fulltext3.test
+++ b/mysql-test/t/fulltext3.test
@@ -22,3 +22,13 @@ DROP TABLE t1;
 
 # End of 5.0 tests
 
+#
+# BUG#29464 - load data infile into table with big5 chinese fulltext index
+#             hangs 100% cpu
+#
+CREATE TABLE t1(a VARCHAR(2) CHARACTER SET big5 COLLATE big5_chinese_ci,
+FULLTEXT(a));
+INSERT INTO t1 VALUES(0xA3C2);
+DROP TABLE t1;
+
+# End of 5.1 tests
diff --git a/storage/myisam/ft_boolean_search.c b/storage/myisam/ft_boolean_search.c
index 5c421d3688b..c881f7a7480 100644
--- a/storage/myisam/ft_boolean_search.c
+++ b/storage/myisam/ft_boolean_search.c
@@ -23,6 +23,12 @@
   inside plus subtree. max_docid could be used by any word in plus
   subtree, but it could be updated by plus-word only.
 
+  Fulltext "smarter index merge" optimization assumes that rows
+  it gets are ordered by doc_id. That is not the case when we
+  search for a word with truncation operator. It may return
+  rows in random order. Thus we may not use "smarter index merge"
+  optimization with "trunc-words".
+
   The idea is: there is no need to search for docid smaller than
   biggest docid inside current plus subtree or any upper plus subtree.
 
@@ -443,7 +449,7 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search)
     memcpy(lastkey_buf+off, info->lastkey, info->lastkey_length);
   }
   ftbw->docid[0]=info->lastpos;
-  if (ftbw->flags & FTB_FLAG_YES)
+  if (ftbw->flags & FTB_FLAG_YES && !(ftbw->flags & FTB_FLAG_TRUNC))
     ftbw->max_docid_expr->max_docid= info->lastpos;
   return 0;
 }
@@ -488,7 +494,7 @@ static void _ftb_init_index_search(FT_INFO *ftb)
       {
         if (ftbe->flags & FTB_FLAG_NO ||                     /* 2 */
             ftbe->up->ythresh - ftbe->up->yweaks >
-            test(ftbe->flags & FTB_FLAG_YES))                /* 1 */
+            (uint) test(ftbe->flags & FTB_FLAG_YES))         /* 1 */
         {
           FTB_EXPR *top_ftbe=ftbe->up;
           ftbw->docid[0]=HA_OFFSET_ERROR;