MDEV-18173 Assertion `o->ind == vers_end' or `o->ind == vers_start' failed in...

MDEV-18173 Assertion `o->ind == vers_end' or `o->ind == vers_start' failed in dict_table_t::instant_column

mysql-test/suite/versioning/r/online.result

@@ -135,5 +135,13 @@ alter table t1 drop system versioning;
 create or replace table t1 (a int, b int) with system versioning;
 insert into t1 values (1, 1);
 alter table t1 drop system versioning;
+#
+# MDEV-18173 Assertion `o->ind == vers_end' or `o->ind == vers_start' failed in dict_table_t::instant_column
+#
+set @@system_versioning_alter_history= keep;
+create or replace table t1 (pk integer primary key, a int, b int, v int as (a))
+with system versioning;
+alter table t1 force;
+alter table t1 drop column b;
 drop database test;
 create database test;

mysql-test/suite/versioning/t/online.test

@@ -172,5 +172,16 @@ set debug_dbug= default;
 }
 alter table t1 drop system versioning;
 
+--echo #
+--echo # MDEV-18173 Assertion `o->ind == vers_end' or `o->ind == vers_start' failed in dict_table_t::instant_column
+--echo #
+set @@system_versioning_alter_history= keep;
+create or replace table t1 (pk integer primary key, a int, b int, v int as (a))
+with system versioning;
+
+alter table t1 force;
+alter table t1 drop column b;
+
+
 drop database test;
 create database test;

storage/innobase/handler/handler0alter.cc

@@ -4213,9 +4213,9 @@ innobase_build_col_map(
 				col_map[old_i - num_old_v] = i;
 				if (old_table->versioned()) {
 					if (old_i == old_table->vers_start) {
-						new_table->vers_start = i;
+						new_table->vers_start = i + num_v;
 					} else if (old_i == old_table->vers_end) {
-						new_table->vers_end = i;
+						new_table->vers_end = i + num_v;
 					}
 				}
 				goto found_col;