MDEV-26433 assertion: table->get_ref_count() == 0 in dict0dict.cc line 1915

Close handlers in THD::drop_temporary_table.

mysql-test/main/insert_innodb.result

@@ -43,3 +43,15 @@ INSERT IGNORE INTO t2 VALUES('abc', 2) ON DUPLICATE KEY UPDATE fld1= 'def';
 Warnings:
 Warning	1452	Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `fk` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
 DROP TABLE t2, t1;
+#
+# MDEV-26433: assertion: table->get_ref_count() == 0 in dict0dict.cc
+# line 1915
+#
+CREATE TEMPORARY TABLE v0 ( v1 TEXT ( 15 ) CHAR SET BINARY NOT NULL NOT NULL UNIQUE CHECK ( v1 ) ) REPLACE SELECT NULL AS v3 , 74 AS v2 ;
+ERROR HY000: Field 'v1' doesn't have a default value
+CREATE TEMPORARY TABLE t1 (i TEXT(15) NOT NULL DEFAULT '' UNIQUE CHECK (i)) engine=innodb
+REPLACE SELECT NULL AS a;
+ERROR HY000: Field 'DB_ROW_HASH_1' doesn't have a default value
+#
+# End of 10.5 tests
+#

mysql-test/main/insert_innodb.test

@@ -62,3 +62,20 @@ INSERT IGNORE INTO t2 VALUES('abc', 2) ON DUPLICATE KEY UPDATE fld1= 'def';
 --disable_warnings
 
 DROP TABLE t2, t1;
+
+--echo #
+--echo # MDEV-26433: assertion: table->get_ref_count() == 0 in dict0dict.cc
+--echo # line 1915
+--echo #
+
+--error ER_NO_DEFAULT_FOR_FIELD
+CREATE TEMPORARY TABLE v0 ( v1 TEXT ( 15 ) CHAR SET BINARY NOT NULL NOT NULL UNIQUE CHECK ( v1 ) ) REPLACE SELECT NULL AS v3 , 74 AS v2 ;
+
+--error ER_NO_DEFAULT_FOR_FIELD
+CREATE TEMPORARY TABLE t1 (i TEXT(15) NOT NULL DEFAULT '' UNIQUE CHECK (i)) engine=innodb
+  REPLACE SELECT NULL AS a;
+
+
+--echo #
+--echo # End of 10.5 tests
+--echo #

sql/temporary_tables.cc

@@ -625,6 +625,10 @@ bool THD::drop_temporary_table(TABLE *table, bool *is_trans, bool delete_table)
   DBUG_PRINT("tmptable", ("Dropping table: '%s'.'%s'",
                           table->s->db.str, table->s->table_name.str));
 
+  // close all handlers in case it is statement abort and some can be left
+  if (is_error())
+    table->file->ha_reset();
+
   locked= lock_temporary_tables();
 
   share= tmp_table_share(table);