DOUBLE_PREC_HB histogram has poor estimates for BIT columns

CREATE TABLE t (a varchar(1), b bit(64)) ENGINE=MyISAM;

INSERT INTO t VALUES

  ('n',x'30'),('v',x'45'),('n',x'01'),('k',x'BE562B1A99001918'),

  ('t',x'30'),('n',x'30'),('n',x'30'),('f',x'21'),('y',x'10'),

  ('n',x'01'),('n',x'02'),('q',x'11'),('i',x'30'),('d',x'E2'),

  ('t',x'61'),('r',x'30'),('q',x'81'),('c',x'02'),('o',x'30'),

  ('v',x'30'),('n',x'02'),('c',x'01'),('g',x'13'),('g',x'22'),

  ('q',x'81'),('n',x'30'),('x',x'6C'),('e',x'15'),('n',x'23'),

  ('z',x'30'),('n',x'01'),('d',x'61'),('y',x'43'),('o',x'F9');

set histogram_type= DOUBLE_PREC_HB;

analyze table t persistent for all;

ANALYZE FORMAT=JSON SELECT b FROM t WHERE 'w' NOT BETWEEN a AND 'y' AND b < b'1000000';

set histogram_type= JSON_HB;

analyze table t persistent for all;

ANALYZE FORMAT=JSON SELECT b FROM t WHERE 'w' NOT BETWEEN a AND 'y' AND b < b'1000000';

# Cleanup

DROP TABLE t;

        "table": {

          "table_name": "t",

          "access_type": "ALL",

          "r_loops": 1,

          "rows": 34,

          "r_rows": 34,

          "r_table_time_ms": 0.003460502,

          "r_other_time_ms": 0.006840761,

          "filtered": 5.555588245,

          "r_filtered": 5.882352941,

          "attached_condition": "'w' not between t.a and 'y' and t.b < 0x40"

        }

        "table": {

          "table_name": "t",

          "access_type": "ALL",

          "r_loops": 1,

          "rows": 34,

          "r_rows": 34,

          "r_table_time_ms": 0.003239832,

          "r_other_time_ms": 0.004062328,

          "filtered": 70.58823395,

          "r_filtered": 5.882352941,

          "attached_condition": "'w' not between t.a and 'y' and t.b < 0x40"

        }