re PR c++/79304 (diagnostic shows bogus expression ((X<T>*)this)->.c)

	PR c++/79304
	* error.c (dump_expr) <case COMPONENT_REF>: Don't print .
	after ARROW_EXPR.

	* g++.dg/diagnostic/pr79304.C: New test.

From-SVN: r245073

gcc/cp/ChangeLog

+2017-01-31  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/79304
+	* error.c (dump_expr) <case COMPONENT_REF>: Don't print .
+	after ARROW_EXPR.
+
 2017-01-31  David Malcolm  <dmalcolm@redhat.com>
 
 	PR c++/79298

gcc/cp/error.c

@@ -2247,7 +2247,8 @@ dump_expr (cxx_pretty_printer *pp, tree t, int flags)
 	else
 	  {
 	    dump_expr (pp, ob, flags | TFF_EXPR_IN_PARENS);
-	    pp_cxx_dot (pp);
+	    if (TREE_CODE (ob) != ARROW_EXPR)
+	      pp_cxx_dot (pp);
 	  }
 	dump_expr (pp, TREE_OPERAND (t, 1), flags & ~TFF_EXPR_IN_PARENS);
       }

gcc/testsuite/ChangeLog

+2017-01-31  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/79304
+	* g++.dg/diagnostic/pr79304.C: New test.
+
 2017-01-31  David Malcolm  <dmalcolm@redhat.com>
 
 	PR c++/79298

gcc/testsuite/g++.dg/diagnostic/pr79304.C

+// PR c++/79304
+// { dg-do compile }
+
+struct C { };
+
+template<class T>
+struct X
+{
+  C* c;
+
+  void f() {
+    this->c.s();	// { dg-error "->c" }
+  }
+};
+
+int main()
+{
+  X<int> x;
+  x.f();
+}