innodb_stats_method=nulls_ignored works incorrectly

MySQL dev-team implemented option innodb_stats_method incorrectly.
On nulls_ignored value we have incorrect statistics.
Test-cases in related branches:
oleg.tsarev (0) /storage/dev/percona/innodb_stats_5.5/Percona-Server-5.5.17-rel21.0-release/mysql-test$ ./mysql-test-run --force percona_stats_null_innodb percona_stats_null_myisam --retry=0
Logging: /storage/dev/percona/innodb_stats_5.5/Percona-Server-5.5.17-rel21.0/mysql-test/mysql-test-run.pl --force percona_stats_null_innodb percona_stats_null_myisam --retry=0
111119 2:40:08 [Note] Flashcache bypass: disabled
111119 2:40:08 [Note] Flashcache setup error is : open flash device failed

MySQL Version 5.5.17
Too long tmpdir path '/storage/dev/percona/innodb_stats_5.5/Percona-Server-5.5.17-rel21.0-release/mysql-test/var/tmp' creating a shorter one...
 - using tmpdir: '/tmp/kJuXcQL9OJ'

Checking supported features...
 - skipping ndbcluster
 - skipping SSL, mysqld not compiled with SSL
Collecting tests...
vardir: /storage/dev/percona/innodb_stats_5.5/Percona-Server-5.5.17-rel21.0-release/mysql-test/var
Checking leftover processes...
Removing old var directory...
Creating var directory '/storage/dev/percona/innodb_stats_5.5/Percona-Server-5.5.17-rel21.0-release/mysql-test/var'...
Installing system database...
Using server port 33614

==============================================================================

TEST RESULT TIME (ms) or COMMENT
--------------------------------------------------------------------------

worker[1] - 'localhost:13000' was not free
worker[1] - 'localhost:13010' was not free
worker[1] - 'localhost:13020' was not free
worker[1] Using MTR_BUILD_THREAD 303, with reserved ports 13030..13039
main.percona_stats_null_myisam [ pass ] 19686
main.percona_stats_null_innodb [ fail ]
        Test ended at 2011-11-19 02:41:01

CURRENT_TEST: main.percona_stats_null_innodb
--- /storage/dev/percona/innodb_stats_5.5/Percona-Server-5.5.17-rel21.0/mysql-test/r/percona_stats_null_innodb.result 2011-11-19 03:39:22.627538466 +0300
+++ /storage/dev/percona/innodb_stats_5.5/Percona-Server-5.5.17-rel21.0/mysql-test/r/percona_stats_null_innodb.reject 2011-11-19 03:41:00.882779055 +0300
@@ -15,4 +15,17 @@
 ANALYZE TABLE t;
 Table Op Msg_type Msg_text
 test.t analyze status OK
+Failed with '--innodb_stats_on_metadata=0 --innodb_stats_method=nulls_ignored --default-storage-engine=InnoDB'
+SELECT count(*) FROM t WHERE id IS NULL;
+count(*)
+94425
+SELECT count(*) FROM t WHERE id IS NOT NULL;
+count(*)
+5664
+SHOW INDEXES FROM t;
+Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
+t 1 t 1 id A 100536 NULL NULL YES BTREE
+
+We are expected cardinality approximately equal to not null count, but this is false
+
 DROP TABLE t;

mysqltest: Result length mismatch

 - saving '/storage/dev/percona/innodb_stats_5.5/Percona-Server-5.5.17-rel21.0-release/mysql-test/var/log/main.percona_stats_null_innodb/' to '/storage/dev/percona/innodb_stats_5.5/Percona-Server-5.5.17-rel21.0-release/mysql-test/var/log/main.percona_stats_null_innodb/'
--------------------------------------------------------------------------
The servers were restarted 1 times
Spent 19.686 of 53 seconds executing testcases

Completed: Failed 1/2 tests, 50.00% were successful.

Failing test(s): main.percona_stats_null_innodb

The log files in var/log may give you some hint of what went wrong.

If you want to report this error, please read first the documentation
at http://dev.mysql.com/doc/mysql/en/mysql-test-suite.html

mysql-test-run: *** ERROR: there were failing test cases
oleg.tsarev (0) /storage/dev/percona/innodb_stats_5.5/Percona-Server-5.5.17-rel21.0-release/mysql-test$