diff --git a/mysql-test/r/show_check.result b/mysql-test/r/show_check.result
index c8ea9d79a13..d707ebaeba5 100644
--- a/mysql-test/r/show_check.result
+++ b/mysql-test/r/show_check.result
@@ -1198,7 +1198,7 @@ CREATE DATABASE mysqltest1;
 use mysqltest1;
 CREATE TABLE t1(колонка1 INT);
 
----> Dumping mysqltest1 to show_check.mysqltest1.sql
+---> Dumping mysqltest1 to outfile1
 
 
 DROP DATABASE mysqltest1;
diff --git a/mysql-test/t/mysql.test b/mysql-test/t/mysql.test
index 40e87ee1cb0..7e970d5b104 100644
--- a/mysql-test/t/mysql.test
+++ b/mysql-test/t/mysql.test
@@ -98,35 +98,43 @@ drop table t1;
 # Bug #20432: mysql client interprets commands in comments
 #
 
+--let $file = $MYSQLTEST_VARDIR/tmp/bug20432.sql
+
 # if the client sees the 'use' within the comment, we haven't fixed
---exec echo "/*"          >  $MYSQLTEST_VARDIR/tmp/bug20432.sql
---exec echo "use"         >> $MYSQLTEST_VARDIR/tmp/bug20432.sql
---exec echo "*/"          >> $MYSQLTEST_VARDIR/tmp/bug20432.sql
---exec $MYSQL              < $MYSQLTEST_VARDIR/tmp/bug20432.sql 2>&1
+--exec echo "/*"          >  $file
+--exec echo "use"         >> $file
+--exec echo "*/"          >> $file
+--exec $MYSQL              < $file 2>&1
 
 # SQL can have embedded comments => workie
---exec echo "select /*"   >  $MYSQLTEST_VARDIR/tmp/bug20432.sql
---exec echo "use"         >> $MYSQLTEST_VARDIR/tmp/bug20432.sql
---exec echo "*/ 1"        >> $MYSQLTEST_VARDIR/tmp/bug20432.sql
---exec $MYSQL              < $MYSQLTEST_VARDIR/tmp/bug20432.sql 2>&1
+--exec echo "select /*"   >  $file
+--exec echo "use"         >> $file
+--exec echo "*/ 1"        >> $file
+--exec $MYSQL              < $file 2>&1
 
 # client commands on the other hand must be at BOL => error
---exec echo "/*"          >  $MYSQLTEST_VARDIR/tmp/bug20432.sql
---exec echo "xxx"         >> $MYSQLTEST_VARDIR/tmp/bug20432.sql
---exec echo "*/ use"      >> $MYSQLTEST_VARDIR/tmp/bug20432.sql
+--exec echo "/*"          >  $file
+--exec echo "xxx"         >> $file
+--exec echo "*/ use"      >> $file
 --error 1
---exec $MYSQL              < $MYSQLTEST_VARDIR/tmp/bug20432.sql 2>&1
+--exec $MYSQL              < $file 2>&1
 
 # client comment recognized, but parameter missing => error
---exec echo "use"         >  $MYSQLTEST_VARDIR/tmp/bug20432.sql
---exec $MYSQL              < $MYSQLTEST_VARDIR/tmp/bug20432.sql 2>&1
+--exec echo "use"         >  $file
+--exec $MYSQL              < $file 2>&1
+
+--remove_file $file
 
 #
 # Bug #20328: mysql client interprets commands in comments
 #
---exec $MYSQL -e "help" > $MYSQLTEST_VARDIR/tmp/bug20328_1.result
---exec $MYSQL -e "help " > $MYSQLTEST_VARDIR/tmp/bug20328_2.result
---diff_files $MYSQLTEST_VARDIR/tmp/bug20328_1.result $MYSQLTEST_VARDIR/tmp/bug20328_2.result
+--let $file1 = $MYSQLTEST_VARDIR/tmp/bug20328_1.result
+--let $file2 = $MYSQLTEST_VARDIR/tmp/bug20328_2.result
+--exec $MYSQL -e "help" > $file1
+--exec $MYSQL -e "help " > $file2
+--diff_files $file1 $file2
+--remove_file $file1
+--remove_file $file2
 
 #
 # Bug #19216: Client crashes on long SELECT
@@ -152,13 +160,15 @@ EOF
 #
 # Bug #20103: Escaping with backslash does not work
 #
---exec echo "SET SQL_MODE = 'NO_BACKSLASH_ESCAPES';"  > $MYSQLTEST_VARDIR/tmp/bug20103.sql
---exec echo "SELECT '\';" >> $MYSQLTEST_VARDIR/tmp/bug20103.sql
---exec $MYSQL < $MYSQLTEST_VARDIR/tmp/bug20103.sql 2>&1
+--let $file = $MYSQLTEST_VARDIR/tmp/bug20103.sql
+--exec echo "SET SQL_MODE = 'NO_BACKSLASH_ESCAPES';"  > $file
+--exec echo "SELECT '\';" >> $file
+--exec $MYSQL < $file 2>&1
 
---exec echo "SET SQL_MODE = '';"  > $MYSQLTEST_VARDIR/tmp/bug20103.sql
---exec echo "SELECT '\';';" >> $MYSQLTEST_VARDIR/tmp/bug20103.sql
---exec $MYSQL              < $MYSQLTEST_VARDIR/tmp/bug20103.sql 2>&1
+--exec echo "SET SQL_MODE = '';"  > $file
+--exec echo "SELECT '\';';" >> $file
+--exec $MYSQL              < $file 2>&1
+--remove_file $file
 
 #
 # Bug#17583: mysql drops connection when stdout is not writable
diff --git a/mysql-test/t/mysqldump-compat.test b/mysql-test/t/mysqldump-compat.test
index 848d66cc728..9a830b16f26 100644
--- a/mysql-test/t/mysqldump-compat.test
+++ b/mysql-test/t/mysqldump-compat.test
@@ -5,9 +5,13 @@
 # Bug #30126: semicolon before closing */ in /*!... CREATE DATABASE ;*/
 #
 
+--let $file = $MYSQLTEST_VARDIR/tmp/bug30126.sql
+
 CREATE DATABASE mysqldump_30126;
 USE mysqldump_30126;
 CREATE TABLE t1 (c1 int);
---exec $MYSQL_DUMP --add-drop-database mysqldump_30126 > $MYSQLTEST_VARDIR/tmp/bug30126.sql
---exec $MYSQL mysqldump_30126 < $MYSQLTEST_VARDIR/tmp/bug30126.sql
+--exec $MYSQL_DUMP --add-drop-database mysqldump_30126 > $file
+--exec $MYSQL mysqldump_30126 < $file
 DROP DATABASE mysqldump_30126;
+
+--remove_file $file
diff --git a/mysql-test/t/mysqltest.test b/mysql-test/t/mysqltest.test
index 142381e4c71..6689a805c5a 100644
--- a/mysql-test/t/mysqltest.test
+++ b/mysql-test/t/mysqltest.test
@@ -1463,7 +1463,7 @@ select "this will be executed";
 
 remove_file $MYSQLTEST_VARDIR/tmp/zero_length_file.result;
 --error 0,1
-remove_file $MYSQLTEST_VARDIR/log/zero_length_file.reject;
+remove_file $MYSQLTEST_VARDIR/tmp/zero_length_file.reject;
 --error 0,1
 remove_file $MYSQL_TEST_DIR/r/zero_length_file.reject;
 
diff --git a/mysql-test/t/show_check.test b/mysql-test/t/show_check.test
index 116298a9c80..e960dbddf02 100644
--- a/mysql-test/t/show_check.test
+++ b/mysql-test/t/show_check.test
@@ -897,10 +897,12 @@ CREATE TABLE t1(
 # Check:
 #   - Dump mysqltest1;
 
---echo
---echo ---> Dumping mysqltest1 to show_check.mysqltest1.sql
+--let $outfile1=$MYSQLTEST_VARDIR/tmp/show_check.mysqltest1.sql
 
---exec $MYSQL_DUMP --default-character-set=latin1 --character-sets-dir=$CHARSETSDIR --databases mysqltest1 > $MYSQLTEST_VARDIR/tmp/show_check.mysqltest1.sql
+--echo
+--echo ---> Dumping mysqltest1 to outfile1
+
+--exec $MYSQL_DUMP --default-character-set=latin1 --character-sets-dir=$CHARSETSDIR --databases mysqltest1 > $outfile1
 
 #   - Clean mysqltest1;
 
@@ -915,7 +917,8 @@ DROP DATABASE mysqltest1;
 --echo
 
 --echo ---> Restoring mysqltest1...
---exec $MYSQL test < $MYSQLTEST_VARDIR/tmp/show_check.mysqltest1.sql
+--exec $MYSQL test < $outfile1
+--remove_file $outfile1
 
 #   - Check definition of the table.
 
diff --git a/storage/innobase/dict/dict0load.c b/storage/innobase/dict/dict0load.c
index f594e64f517..65f1c9536bd 100644
--- a/storage/innobase/dict/dict0load.c
+++ b/storage/innobase/dict/dict0load.c
@@ -868,11 +868,11 @@ err_exit:
 	of the error condition, since the user may want to dump data from the
 	clustered index. However we load the foreign key information only if
 	all indexes were loaded. */
-	if (err != DB_SUCCESS && !srv_force_recovery) {
-		dict_mem_table_free(table);
-		table = NULL;
-	} else if (err == DB_SUCCESS) {
+	if (err == DB_SUCCESS) {
 		err = dict_load_foreigns(table->name, TRUE);
+	} else if (!srv_force_recovery) {
+		dict_table_remove_from_cache(table);
+		table = NULL;
 	}
 #if 0
 	if (err != DB_SUCCESS && table != NULL) {
diff --git a/storage/innobase/include/rem0rec.h b/storage/innobase/include/rem0rec.h
index 43ef6650e90..abc204bb583 100644
--- a/storage/innobase/include/rem0rec.h
+++ b/storage/innobase/include/rem0rec.h
@@ -365,8 +365,9 @@ rec_set_field_extern_bits(
 /***************************************************************
 This is used to modify the value of an already existing field in a record.
 The previous value must have exactly the same size as the new value. If len
-is UNIV_SQL_NULL then the field is treated as an SQL null for old-style
-records. For new-style records, len must not be UNIV_SQL_NULL. */
+is UNIV_SQL_NULL then the field is treated as an SQL null.
+For records in ROW_FORMAT=COMPACT (new-style records), len must not be
+UNIV_SQL_NULL unless the field already is SQL null. */
 UNIV_INLINE
 void
 rec_set_nth_field(
@@ -375,11 +376,7 @@ rec_set_nth_field(
 	const ulint*	offsets,/* in: array returned by rec_get_offsets() */
 	ulint		n,	/* in: index number of the field */
 	const void*	data,	/* in: pointer to the data if not SQL null */
-	ulint		len);	/* in: length of the data or UNIV_SQL_NULL.
-				If not SQL null, must have the same
-				length as the previous value.
-				If SQL null, previous value must be
-				SQL null. */
+	ulint		len);	/* in: length of the data or UNIV_SQL_NULL */
 /**************************************************************
 The following function returns the data size of an old-style physical
 record, that is the sum of field lengths. SQL null fields
diff --git a/storage/innobase/include/rem0rec.ic b/storage/innobase/include/rem0rec.ic
index 5a4a0a0b5df..d91fb4c4391 100644
--- a/storage/innobase/include/rem0rec.ic
+++ b/storage/innobase/include/rem0rec.ic
@@ -1219,8 +1219,9 @@ rec_get_nth_field_size(
 /***************************************************************
 This is used to modify the value of an already existing field in a record.
 The previous value must have exactly the same size as the new value. If len
-is UNIV_SQL_NULL then the field is treated as an SQL null for old-style
-records. For new-style records, len must not be UNIV_SQL_NULL. */
+is UNIV_SQL_NULL then the field is treated as an SQL null.
+For records in ROW_FORMAT=COMPACT (new-style records), len must not be
+UNIV_SQL_NULL unless the field already is SQL null. */
 UNIV_INLINE
 void
 rec_set_nth_field(
@@ -1230,11 +1231,7 @@ rec_set_nth_field(
 	ulint		n,	/* in: index number of the field */
 	const void*	data,	/* in: pointer to the data
 				if not SQL null */
-	ulint		len)	/* in: length of the data or UNIV_SQL_NULL.
-				If not SQL null, must have the same
-				length as the previous value.
-				If SQL null, previous value must be
-				SQL null. */
+	ulint		len)	/* in: length of the data or UNIV_SQL_NULL */
 {
 	byte*	data2;
 	ulint	len2;
@@ -1242,9 +1239,11 @@ rec_set_nth_field(
 	ut_ad(rec);
 	ut_ad(rec_offs_validate(rec, NULL, offsets));
 
-	if (len == UNIV_SQL_NULL) {
-		ut_ad(!rec_offs_comp(offsets));
-		rec_set_nth_field_sql_null(rec, n);
+	if (UNIV_UNLIKELY(len == UNIV_SQL_NULL)) {
+		if (!rec_offs_nth_sql_null(offsets, n)) {
+			ut_a(!rec_offs_comp(offsets));
+			rec_set_nth_field_sql_null(rec, n);
+		}
 
 		return;
 	}
diff --git a/storage/innobase/include/trx0roll.h b/storage/innobase/include/trx0roll.h
index 25546430ba0..c1eca3d5753 100644
--- a/storage/innobase/include/trx0roll.h
+++ b/storage/innobase/include/trx0roll.h
@@ -15,6 +15,8 @@ Created 3/26/1996 Heikki Tuuri
 #include "mtr0mtr.h"
 #include "trx0sys.h"
 
+#define trx_roll_free_all_savepoints(s) trx_roll_savepoints_free((s), NULL)
+
 /***********************************************************************
 Returns a transaction savepoint taken at this point in time. */
 
@@ -237,7 +239,17 @@ trx_release_savepoint_for_mysql(
 	const char*	savepoint_name);	/* in: savepoint name */
 
 /***********************************************************************
-Frees savepoint structs. */
+Frees a single savepoint struct. */
+
+void
+trx_roll_savepoint_free(
+/*=====================*/
+	trx_t*			trx,	/* in: transaction handle */
+	trx_named_savept_t*	savep);	/* in: savepoint to free */
+
+/***********************************************************************
+Frees savepoint structs starting from savep, if savep == NULL then
+free all savepoints. */
 
 void
 trx_roll_savepoints_free(
diff --git a/storage/innobase/lock/lock0lock.c b/storage/innobase/lock/lock0lock.c
index 173d074cb82..d9bc8ba09e4 100644
--- a/storage/innobase/lock/lock0lock.c
+++ b/storage/innobase/lock/lock0lock.c
@@ -681,7 +681,10 @@ lock_is_table_exclusive(
 	lock_t*	lock;
 	ibool	ok	= FALSE;
 
-	ut_ad(table && trx);
+	ut_ad(table);
+	ut_ad(trx);
+
+	lock_mutex_enter_kernel();
 
 	for (lock = UT_LIST_GET_FIRST(table->locks);
 	     lock;
@@ -689,7 +692,7 @@ lock_is_table_exclusive(
 		if (lock->trx != trx) {
 			/* A lock on the table is held
 			by some other transaction. */
-			return(FALSE);
+			goto not_ok;
 		}
 
 		if (!(lock_get_type(lock) & LOCK_TABLE)) {
@@ -706,11 +709,16 @@ lock_is_table_exclusive(
 			auto_increment lock. */
 			break;
 		default:
+not_ok:
 			/* Other table locks than LOCK_IX are not allowed. */
-			return(FALSE);
+			ok = FALSE;
+			goto func_exit;
 		}
 	}
 
+func_exit:
+	lock_mutex_exit_kernel();
+
 	return(ok);
 }
 
@@ -3664,6 +3672,7 @@ lock_table_has_to_wait_in_queue(
 	dict_table_t*	table;
 	lock_t*		lock;
 
+	ut_ad(mutex_own(&kernel_mutex));
 	ut_ad(lock_get_wait(wait_lock));
 
 	table = wait_lock->un_member.tab_lock.table;
diff --git a/storage/innobase/trx/trx0roll.c b/storage/innobase/trx/trx0roll.c
index 91dcf035f96..8934fe87c7e 100644
--- a/storage/innobase/trx/trx0roll.c
+++ b/storage/innobase/trx/trx0roll.c
@@ -185,7 +185,25 @@ trx_rollback_last_sql_stat_for_mysql(
 }
 
 /***********************************************************************
-Frees savepoint structs. */
+Frees a single savepoint struct. */
+
+void
+trx_roll_savepoint_free(
+/*=====================*/
+	trx_t*			trx,	/* in: transaction handle */
+	trx_named_savept_t*	savep)	/* in: savepoint to free */
+{
+	ut_a(savep != NULL);
+	ut_a(UT_LIST_GET_LEN(trx->trx_savepoints) > 0);
+
+	UT_LIST_REMOVE(trx_savepoints, trx->trx_savepoints, savep);
+	mem_free(savep->name);
+	mem_free(savep);
+}
+
+/***********************************************************************
+Frees savepoint structs starting from savep, if savep == NULL then
+free all savepoints. */
 
 void
 trx_roll_savepoints_free(
@@ -206,9 +224,7 @@ trx_roll_savepoints_free(
 	while (savep != NULL) {
 		next_savep = UT_LIST_GET_NEXT(trx_savepoints, savep);
 
-		UT_LIST_REMOVE(trx_savepoints, trx->trx_savepoints, savep);
-		mem_free(savep->name);
-		mem_free(savep);
+		trx_roll_savepoint_free(trx, savep);
 
 		savep = next_savep;
 	}
@@ -343,8 +359,8 @@ trx_savepoint_for_mysql(
 }
 
 /***********************************************************************
-Releases a named savepoint. Savepoints which
-were set after this savepoint are deleted. */
+Releases only the named savepoint. Savepoints which were set after this
+savepoint are left as is. */
 
 ulint
 trx_release_savepoint_for_mysql(
@@ -360,31 +376,16 @@ trx_release_savepoint_for_mysql(
 
 	savep = UT_LIST_GET_FIRST(trx->trx_savepoints);
 
+	/* Search for the savepoint by name and free if found. */
 	while (savep != NULL) {
 		if (0 == ut_strcmp(savep->name, savepoint_name)) {
-			/* Found */
-			break;
+			trx_roll_savepoint_free(trx, savep);
+			return(DB_SUCCESS);
 		}
 		savep = UT_LIST_GET_NEXT(trx_savepoints, savep);
 	}
 
-	if (savep == NULL) {
-
-		return(DB_NO_SAVEPOINT);
-	}
-
-	/* We can now free all savepoints strictly later than this one */
-
-	trx_roll_savepoints_free(trx, savep);
-
-	/* Now we can free this savepoint too */
-
-	UT_LIST_REMOVE(trx_savepoints, trx->trx_savepoints, savep);
-
-	mem_free(savep->name);
-	mem_free(savep);
-
-	return(DB_SUCCESS);
+	return(DB_NO_SAVEPOINT);
 }
 
 /***********************************************************************
diff --git a/storage/innobase/trx/trx0trx.c b/storage/innobase/trx/trx0trx.c
index 1fceaa3562c..43456865903 100644
--- a/storage/innobase/trx/trx0trx.c
+++ b/storage/innobase/trx/trx0trx.c
@@ -930,8 +930,8 @@ trx_commit_off_kernel(
 		mutex_enter(&kernel_mutex);
 	}
 
-	/* Free savepoints */
-	trx_roll_savepoints_free(trx, NULL);
+	/* Free all savepoints */
+	trx_roll_free_all_savepoints(trx);
 
 	trx->conc_state = TRX_NOT_STARTED;
 	trx->rseg = NULL;