MDEV-10185: Assertion `tree1->keys[key_no] && tree2->keys[key_no]' failed in

Make tree_or set correct SEL_TREE::keys_map for the result.

mysql-test/r/range.result

@@ -2288,5 +2288,16 @@ Warnings:
 Warning	1366	Incorrect string value: '\xF0\x9F\x98\x8E' for column 'a' at row 1
 DROP TABLE t1;
 #
+# MDEV-10185: Assertion `tree1->keys[key_no] && tree2->keys[key_no]' failed in 
+#             sel_trees_can_be_ored(RANGE_OPT_PARAM*, SEL_TREE*, SEL_TREE*, key_map*)
+#
+CREATE TABLE t1 (pk INT PRIMARY KEY);
+INSERT INTO t1 VALUES (1),(2);
+SELECT * FROM t1 WHERE pk != 1000 OR pk IN ( 1000, 0, 1, 100, 2 ) OR pk >= 5;
+pk
+1
+2
+DROP TABLE t1;
+#
 # End of 10.1 tests
 #

mysql-test/r/range_mrr_icp.result

@@ -2290,6 +2290,17 @@ Warnings:
 Warning	1366	Incorrect string value: '\xF0\x9F\x98\x8E' for column 'a' at row 1
 DROP TABLE t1;
 #
+# MDEV-10185: Assertion `tree1->keys[key_no] && tree2->keys[key_no]' failed in 
+#             sel_trees_can_be_ored(RANGE_OPT_PARAM*, SEL_TREE*, SEL_TREE*, key_map*)
+#
+CREATE TABLE t1 (pk INT PRIMARY KEY);
+INSERT INTO t1 VALUES (1),(2);
+SELECT * FROM t1 WHERE pk != 1000 OR pk IN ( 1000, 0, 1, 100, 2 ) OR pk >= 5;
+pk
+1
+2
+DROP TABLE t1;
+#
 # End of 10.1 tests
 #
 set optimizer_switch=@mrr_icp_extra_tmp;

mysql-test/t/range.test

@@ -1816,6 +1816,15 @@ INSERT INTO t1 VALUES ('a'),('b'),('c'),('d'),('e');
 EXPLAIN SELECT * FROM t1 WHERE a<=>'😎';
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-10185: Assertion `tree1->keys[key_no] && tree2->keys[key_no]' failed in 
+--echo #             sel_trees_can_be_ored(RANGE_OPT_PARAM*, SEL_TREE*, SEL_TREE*, key_map*)
+--echo #
+CREATE TABLE t1 (pk INT PRIMARY KEY);
+INSERT INTO t1 VALUES (1),(2);
+SELECT * FROM t1 WHERE pk != 1000 OR pk IN ( 1000, 0, 1, 100, 2 ) OR pk >= 5;
+DROP TABLE t1;
+
 --echo #
 --echo # End of 10.1 tests
 --echo #

sql/opt_range.cc

@@ -8580,6 +8580,7 @@ tree_or(RANGE_OPT_PARAM *param,SEL_TREE *tree1,SEL_TREE *tree2)
         for e.g. "key IN (c1, ..., cN)" which produces a lot of ranges.
       */
       result= tree1;
+      result->keys_map.clear_all();
     }
     else
     {