MDEV-3934 Assertion `((keypart_map+1) & keypart_map) == 0' failed in...

MDEV-3934 Assertion `((keypart_map+1) & keypart_map) == 0' failed in _mi_pack_key with an index on a POINT column

sel_arg_range_seq_next(): set keypart map also for GEOM_FLAG keys

mysql-test/r/gis2.result

+CREATE TABLE t1 (
+id INT UNSIGNED NOT NULL AUTO_INCREMENT,
+point_data POINT NOT NULL,
+PRIMARY KEY (id),
+KEY idx_point_data(point_data)
+) ENGINE=MyISAM;
+INSERT t1 (point_data) VALUES
+(GeomFromText('Point(37.0248492 23.8512726)')),
+(GeomFromText('Point(38.0248492 23.8512726)'));
+SELECT id FROM t1
+WHERE ST_Contains(point_data, GeomFromText('Point(38.0248492 23.8512726)'));
+id
+2
+DROP TABLE t1;

mysql-test/t/gis2.test

+#
+# MDEV-3934 Assertion `((keypart_map+1) & keypart_map) == 0' failed in _mi_pack_key with an index on a POINT column
+#
+
+CREATE TABLE t1 (
+      id INT UNSIGNED NOT NULL AUTO_INCREMENT,
+      point_data POINT NOT NULL,
+      PRIMARY KEY (id),
+      KEY idx_point_data(point_data)
+) ENGINE=MyISAM;
+INSERT t1 (point_data) VALUES
+    (GeomFromText('Point(37.0248492 23.8512726)')),
+    (GeomFromText('Point(38.0248492 23.8512726)'));
+SELECT id FROM t1
+WHERE ST_Contains(point_data, GeomFromText('Point(38.0248492 23.8512726)'));
+DROP TABLE t1;
+

sql/opt_range_mrr.cc

@@ -248,6 +248,7 @@ walk_up_n_right:
     /* Here minimum contains also function code bits, and maximum is +inf */
     range->start_key.key=    seq->param->min_key;
     range->start_key.length= min_key_length;
+    range->start_key.keypart_map= make_prev_keypart_map(cur->min_key_parts);
     range->start_key.flag=  (ha_rkey_function) (cur->min_key_flag ^ GEOM_FLAG);
   }
   else