MDEV-32725 innodb.import_update_stats accesses uninitialized ib_table->stat_n_rows

- InnoDB should write all zeros into a table and its indexes
statistics members when table is unreadable.

mysql-test/suite/innodb/t/import_update_stats.test

@@ -4,7 +4,6 @@
 
 --source include/not_embedded.inc
 --source include/have_innodb.inc
---source include/not_valgrind.inc # MDEV-32725 FIXME
 
 let MYSQLD_DATADIR =`SELECT @@datadir`;
 SET @old_innodb_file_per_table = @@innodb_file_per_table;

storage/innobase/dict/dict0stats.cc

@@ -530,16 +530,9 @@ dict_stats_empty_index(
 	}
 }
 
-/*********************************************************************//**
-Write all zeros (or 1 where it makes sense) into a table and its indexes'
-statistics members. The resulting stats correspond to an empty table. */
-static
-void
-dict_stats_empty_table(
-/*===================*/
-	dict_table_t*	table,	/*!< in/out: table */
+void dict_stats_empty_table(
+	dict_table_t*	table,
 	bool		empty_defrag_stats)
-				/*!< in: whether to empty defrag stats */
 {
 	mutex_enter(&dict_sys.mutex);
 

storage/innobase/handler/ha_innodb.cc

@@ -14316,7 +14316,7 @@ ha_innobase::info_low(
 	DBUG_ASSERT(ib_table->get_ref_count() > 0);
 
 	if (!ib_table->is_readable()) {
-		ib_table->stat_initialized = true;
+		dict_stats_empty_table(ib_table, true);
 	}
 
 	if (flag & HA_STATUS_TIME) {

storage/innobase/include/dict0stats.h

@@ -240,4 +240,13 @@ dict_stats_report_error(dict_table_t* table, bool defragment = false)
 void test_dict_stats_all();
 #endif /* UNIV_ENABLE_UNIT_TEST_DICT_STATS */
 
+/** Write all zeros (or 1 where it makes sense) into a table
+and its indexes'statistics members. The resulting stats
+correspond to an empty table.
+@param	table			table stats to be emptied
+@param  empty_defrag_stats	empty the defrag stats */
+void
+dict_stats_empty_table(
+	dict_table_t*	table,
+	bool		empty_defrag_stats);
 #endif /* dict0stats_h */