re PR c++/34927 (Duplicate error message about abstract class)

2011-10-08  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/34927
	* typeck2.c (abstract_virtuals_error_sfinae): Don't produce duplicate
	inform messages in case of cloned destructor.

From-SVN: r179718

gcc/cp/ChangeLog

+2011-10-08  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/34927
+	* typeck2.c (abstract_virtuals_error_sfinae): Don't produce duplicate
+	inform messages in case of cloned destructor.
+
 2011-10-06  Jason Merrill  <jason@redhat.com>
 
 	PR c++/39164

gcc/cp/typeck2.c

@@ -340,7 +340,10 @@ abstract_virtuals_error_sfinae (tree decl, tree type, tsubst_flags_t complain)
 	      type);
 
       FOR_EACH_VEC_ELT (tree, pure, ix, fn)
-	inform (input_location, "\t%+#D", fn);
+	if (! DECL_CLONED_FUNCTION_P (fn)
+	    || DECL_COMPLETE_DESTRUCTOR_P (fn))
+	  inform (input_location, "\t%+#D", fn);
+
       /* Now truncate the vector.  This leaves it non-null, so we know
 	 there are pure virtuals, but empty so we don't list them out
 	 again.  */