re PR c++/38701 (ICE with defaulted function)

        PR c++/38701
        * decl.c (cp_finish_decl): Clear DECL_INITIAL for invalid
        defaulting.

        PR c++/38702
        * class.c (defaultable_fn_p): Only operator== can be a copy
        assignment operator.

From-SVN: r143081

gcc/cp/ChangeLog

+2009-01-05  Jason Merrill  <jason@redhat.com>
+
+	PR c++/38701
+	* decl.c (cp_finish_decl): Clear DECL_INITIAL for invalid
+	defaulting.
+
+	PR c++/38702
+	* class.c (defaultable_fn_p): Only operator== can be a copy
+	assignment operator.
+
 2009-01-02  Jason Merrill  <jason@redhat.com>
 
 	PR c++/38698

gcc/cp/class.c

@@ -4147,7 +4147,8 @@ defaultable_fn_p (tree fn)
     }
   else if (DECL_DESTRUCTOR_P (fn))
     return true;
-  else if (DECL_ASSIGNMENT_OPERATOR_P (fn))
+  else if (DECL_ASSIGNMENT_OPERATOR_P (fn)
+	   && DECL_OVERLOADED_OPERATOR_P (fn) == NOP_EXPR)
     return copy_fn_p (fn);
   else
     return false;

gcc/cp/decl.c

@@ -5517,7 +5517,10 @@ cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
       else if (init == ridpointers[(int)RID_DEFAULT])
 	{
 	  if (!defaultable_fn_p (decl))
-	    error ("%qD cannot be defaulted", decl);
+	    {
+	      error ("%qD cannot be defaulted", decl);
+	      DECL_INITIAL (decl) = NULL_TREE;
+	    }
 	  else
 	    DECL_DEFAULTED_FN (decl) = 1;
 	}

gcc/testsuite/ChangeLog

+2009-01-05  Jason Merrill  <jason@redhat.com>
+
+	* g++.dg/cpp0x/defaulted7.C: New test.
+
 2009-01-05  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/38672

gcc/testsuite/g++.dg/cpp0x/defaulted7.C

+// PR c++/38701, 38702
+// { dg-options "-std=c++0x" }
+
+void foo() = default;		// { dg-error "cannot be defaulted" }
+namespace
+{
+  void bar() = default;		// { dg-error "cannot be defaulted" }
+}
+
+enum E { e };
+
+E& operator |= (E&, const E&) = default; // { dg-error "cannot be defaulted" }