Index: testsuite/g++.dg/other/error16.C
===================================================================
*** testsuite/g++.dg/other/error16.C	(revision 0)
--- testsuite/g++.dg/other/error16.C	(revision 0)
***************
*** 0 ****
--- 1,14 ----
+ // PR c++/17763
+ 
+ template <typename U> struct Outer {
+     struct Inner {};
+     Inner foo();
+ };
+ 
+ typedef int X;
+ typedef Outer<X> XOuter;
+ 
+ int main() {
+   Outer<int>  ab;
+   ab.foo() == 1; // { dg-error "ab.Outer" }
+ }
Index: cp/error.c
===================================================================
*** cp/error.c	(revision 127330)
--- cp/error.c	(working copy)
*************** dump_expr (tree t, int flags)
*** 1550,1562 ****
  	    if (TREE_CODE (ob) == ADDR_EXPR)
  	      {
  		dump_expr (TREE_OPERAND (ob, 0), flags | TFF_EXPR_IN_PARENS);
! 		pp_dot (cxx_pp);
  	      }
  	    else if (TREE_CODE (ob) != PARM_DECL
  		     || strcmp (IDENTIFIER_POINTER (DECL_NAME (ob)), "this"))
  	      {
  		dump_expr (ob, flags | TFF_EXPR_IN_PARENS);
! 		pp_arrow (cxx_pp);
  	      }
  	    skipfirst = true;
  	  }
--- 1550,1562 ----
  	    if (TREE_CODE (ob) == ADDR_EXPR)
  	      {
  		dump_expr (TREE_OPERAND (ob, 0), flags | TFF_EXPR_IN_PARENS);
! 		pp_cxx_dot (cxx_pp);
  	      }
  	    else if (TREE_CODE (ob) != PARM_DECL
  		     || strcmp (IDENTIFIER_POINTER (DECL_NAME (ob)), "this"))
  	      {
  		dump_expr (ob, flags | TFF_EXPR_IN_PARENS);
! 		pp_cxx_arrow (cxx_pp);
  	      }
  	    skipfirst = true;
  	  }