PR c++/80639 - ICE with invalid PMF initialization.

	PR c++/80043 - ICE with -fpermissive
	* typeck.c (convert_for_assignment): Recurse when instantiate_type
	returns without an error.

From-SVN: r249317

gcc/cp/ChangeLog

+2017-06-16  Jason Merrill  <jason@redhat.com>
+
+	PR c++/80639 - ICE with invalid PMF initialization.
+	PR c++/80043 - ICE with -fpermissive
+	* typeck.c (convert_for_assignment): Recurse when instantiate_type
+	returns without an error.
+
 2017-06-16  Nathan Sidwell  <nathan@acm.org>
 
 	* pt.c (tsubst_baselink): Fix & clarify formatting.

gcc/cp/typeck.c

@@ -8590,9 +8590,10 @@ convert_for_assignment (tree type, tree rhs,
 	      if (rhstype == unknown_type_node)
 		{
 		  tree r = instantiate_type (type, rhs, tf_warning_or_error);
-		  /* -fpermissive might allow this.  */
+		  /* -fpermissive might allow this; recurse.  */
 		  if (!seen_error ())
-		    return r;
+		    return convert_for_assignment (type, r, errtype, fndecl,
+						   parmnum, complain, flags);
 		}
 	      else if (fndecl)
 		error ("cannot convert %qH to %qI for argument %qP to %qD",

gcc/testsuite/g++.dg/template/ptrmem31.C

+// PR c++/80639
+// { dg-do compile { target c++14 } }
+
+template < typename > struct A;
+
+struct B
+{ 
+  template < int > void m ();
+  template < int > struct K { static void n (); };
+  void p () { K < 0 >::n (); }
+};
+
+template <> struct A < B >
+{ 
+  using T = void (A::*)();
+  template < int u > static constexpr T h = &B::m < u >; // { dg-error "cannot convert" }
+};
+
+template < int v > void B::K < v >::n ()
+{ 
+  using S = A < B >;
+  S::h < 0 >;
+}