Bug#31113 mysqldump 5.1 can't handle a dash ("-") in database names

db name should be quoted. this code does communication with the server.
it's always ok to quote names in this case.

client/mysqldump.c

@@ -1040,8 +1040,10 @@ static int fetch_db_collation(const char *db_name,
   char query[QUERY_LENGTH];
   MYSQL_RES *db_cl_res;
   MYSQL_ROW db_cl_row;
+  char quoted_database_buf[NAME_LEN*2+3];
+  char *qdatabase= quote_name(db_name, quoted_database_buf, 1);
 
-  my_snprintf(query, sizeof (query), "use %s", db_name);
+  my_snprintf(query, sizeof (query), "use %s", qdatabase);
 
   if (mysql_query_with_error_report(mysql, NULL, query))
     return 1;

mysql-test/r/mysqldump.result

@@ -4212,5 +4212,24 @@ TRUNCATE mysql.event;
 SHOW EVENTS;
 Db	Name	Definer	Time zone	Type	Execute at	Interval value	Interval field	Starts	Ends	Status	Originator	character_set_client	collation_connection	Database Collation
 #
+# Bug#31113 mysqldump 5.1 can't handle a dash ("-") in database names
+#
+create database `test-database`;
+use `test-database`;
+create table test (a int);
+DROP TABLE IF EXISTS `test`;
+SET @saved_cs_client     = @@character_set_client;
+SET character_set_client = utf8;
+CREATE TABLE `test` (
+  `a` int(11) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1;
+SET character_set_client = @saved_cs_client;
+LOCK TABLES `test` WRITE;
+/*!40000 ALTER TABLE `test` DISABLE KEYS */;
+/*!40000 ALTER TABLE `test` ENABLE KEYS */;
+UNLOCK TABLES;
+drop database `test-database`;
+use test;
+#
 # End of 5.1 tests
 #

mysql-test/t/mysqldump.test

@@ -1788,6 +1788,18 @@ TRUNCATE mysql.event;
 --exec $MYSQL < $MYSQLTEST_VARDIR/tmp/bug29938.sql
 SHOW EVENTS;
 
+
+--echo #
+--echo # Bug#31113 mysqldump 5.1 can't handle a dash ("-") in database names
+--echo #
+create database `test-database`;
+use `test-database`;
+create table test (a int);
+--exec $MYSQL_DUMP --compact --opt --quote-names test-database
+drop database `test-database`;
+use test;
+
+
 --echo #
 --echo # End of 5.1 tests
 --echo #