ha_innobase::add_index(): Reset trx->error_state in error handling.

(Bug #53591)

mysql-test/suite/innodb_plugin/r/innodb_bug53591.result

+SET GLOBAL innodb_file_format='Barracuda';
+SET GLOBAL innodb_file_per_table=on;
+set old_alter_table=0;
+CREATE TABLE bug53591(a text charset utf8 not null)
+ENGINE=InnoDB KEY_BLOCK_SIZE=1;
+ALTER TABLE bug53591 ADD PRIMARY KEY(a(220));
+ERROR HY000: Too big row
+SHOW WARNINGS;
+Level	Code	Message
+Error	139	Too big row
+Error	1118	Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. You have to change some columns to TEXT or BLOBs
+Error	1030	Got error 139 from storage engine
+DROP TABLE bug53591;
+SET GLOBAL innodb_file_format=Antelope;
+SET GLOBAL innodb_file_format_check=Antelope;
+SET GLOBAL innodb_file_per_table=0;

mysql-test/suite/innodb_plugin/t/innodb_bug53591.test

+-- source include/have_innodb_plugin.inc
+
+let $file_format=`select @@innodb_file_format`;
+let $file_format_check=`select @@innodb_file_format_check`;
+let $file_per_table=`select @@innodb_file_per_table`;
+
+SET GLOBAL innodb_file_format='Barracuda';
+SET GLOBAL innodb_file_per_table=on;
+
+set old_alter_table=0;
+
+CREATE TABLE bug53591(a text charset utf8 not null)
+ENGINE=InnoDB KEY_BLOCK_SIZE=1;
+-- error 139
+ALTER TABLE bug53591 ADD PRIMARY KEY(a(220));
+SHOW WARNINGS;
+
+DROP TABLE bug53591;
+
+EVAL SET GLOBAL innodb_file_format=$file_format;
+EVAL SET GLOBAL innodb_file_format_check=$file_format_check;
+EVAL SET GLOBAL innodb_file_per_table=$file_per_table;

storage/innodb_plugin/handler/handler0alter.cc

@@ -894,6 +894,8 @@ ha_innobase::add_index(
 		prebuilt->trx->error_info = NULL;
 		/* fall through */
 	default:
+		trx->error_state = DB_SUCCESS;
+
 		if (new_primary) {
 			if (indexed_table != innodb_table) {
 				row_merge_drop_table(trx, indexed_table);