--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/testsuite/gcc.dg/union-3.c Fri Oct 27 22:46:09 2017 +0900 @@ -0,0 +1,10 @@ +/* PR target/27421 */ +/* { dg-do compile } */ + +union A +{ + int i; + void x[1]; /* { dg-error "array of voids" } */ +}; + +void foo(union A a) {}