pr57878.C (__sso_string_base::_M_get_allocator): Return a value.

	* g++.dg/pr57878.C (__sso_string_base::_M_get_allocator): Return
	a value.

From-SVN: r254537

gcc/testsuite/ChangeLog

 2017-11-08  Jakub Jelinek  <jakub@redhat.com>
 
+	* g++.dg/pr57878.C (__sso_string_base::_M_get_allocator): Return
+	a value.
+
 	PR tree-optimization/78821
 	* gcc.dg/store_merging_2.c: Expect 3 store mergings instead of 2.
 	* gcc.dg/store_merging_13.c (f7, f8, f9, f10, f11, f12, f13): New

gcc/testsuite/g++.dg/pr57878.C

@@ -95,6 +95,8 @@ namespace __gnu_cxx __attribute__ ((__visibility__ ("default"))) {
     }
     __sso_string_base(const __sso_string_base& __rcs);
     const _CharT_alloc_type& _M_get_allocator() const {
+      static _CharT_alloc_type c;
+      return c;
     }
   };
   template<typename _CharT, typename _Traits, typename _Alloc>