ALTER TABLE...IMPORT TABLESPACE with FULLTEXT SEARCH may corrupt the adaptive hash index

./mtr --mem --skip-stack-trace --parallel=6 --repeat=10 --mysqld=--loose-innodb-adaptive-hash-index=ON --suite=innodb innodb.import_hidden_fts{,,,,,}

CURRENT_TEST: innodb.import_hidden_fts

mysqltest: At line 43: query 'ALTER TABLE t1 IMPORT TABLESPACE' failed: <Unknown> (2013): Lost connection to server during query

...

2024-10-02 10:50:25 14 [Note] InnoDB: Phase IV - Flush complete

2024-10-02 10:50:25 14 [Warning] InnoDB: Added system generated FTS_DOC_ID and FTS_DOC_ID_INDEX while importing the tablespace `test`.`t1`

mariadbd: /mariadb/10.11/storage/innobase/dict/dict0mem.cc:207: void dict_mem_table_free(dict_table_t*): Assertion `(table->freed_indexes).count == 0' failed.

241002 10:50:25 [ERROR] mysqld got signal 6 ;

diff --git a/storage/innobase/row/row0import.cc b/storage/innobase/row/row0import.cc

index 4d5f3592b5a..ca27e26d55a 100644

--- a/storage/innobase/row/row0import.cc

+++ b/storage/innobase/row/row0import.cc

@@ -3335,7 +3335,9 @@ static dict_table_t *build_fts_hidden_table(

       new_index->fields[old_index->n_fields].fixed_len= sizeof(doc_id_t);

     }

-    new_index->search_info= old_index->search_info;

+#ifdef BTR_CUR_ADAPT

+    new_index->search_info= btr_search_info_create(new_index->heap);

+#endif /* BTR_CUR_ADAPT */

     UT_LIST_ADD_LAST(new_index->table->indexes, new_index);

     old_index= UT_LIST_GET_NEXT(indexes, old_index);

     if (UT_LIST_GET_LEN(new_table->indexes)