--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/testsuite/gcc.dg/lvalue-4.c Fri Oct 27 22:46:09 2017 +0900 @@ -0,0 +1,8 @@ +/* PR c/27721 */ +/* { dg-do compile } */ + +void foo() +{ + int i(); + i += 0; /* { dg-error "lvalue required" } */ +}