1 //  { dg-additional-options "-fsyntax-only -w" }
2 
3 #include "coro.h"
4 
bar()5 auto bar () {
6   co_return 5;  // { dg-error "cannot be used in a function with a deduced return type" }
7 }
8 
main()9 int main () {
10   bar ();
11   return 0;
12 }
13