Add a test case for Bug#29817. The bug was fixed by the patch for

Bug#28318.

mysql-test/r/skip_grants.result

@@ -72,3 +72,9 @@ count(*)
 select count(*) from information_schema.USER_PRIVILEGES;
 count(*)
 0
+#
+# Bug#29817 Queries with UDF fail with non-descriptive error
+# if mysql.proc is missing
+#
+select no_such_function(1);
+ERROR 42000: FUNCTION test.no_such_function does not exist

mysql-test/t/skip_grants.test

@@ -122,3 +122,9 @@ select count(*) from information_schema.COLUMN_PRIVILEGES;
 select count(*) from information_schema.SCHEMA_PRIVILEGES;
 select count(*) from information_schema.TABLE_PRIVILEGES;
 select count(*) from information_schema.USER_PRIVILEGES;
+--echo #
+--echo # Bug#29817 Queries with UDF fail with non-descriptive error
+--echo # if mysql.proc is missing
+--echo #
+--error ER_SP_DOES_NOT_EXIST
+select no_such_function(1);