Initializing formals can't be optional parameters

runtime/vm/parser.cc

Index: runtime/vm/parser.cc
===================================================================
--- runtime/vm/parser.cc	(revision 1754)
+++ runtime/vm/parser.cc	(working copy)
@@ -840,6 +840,10 @@
   parameter.name_pos = token_index_;
   ConsumeToken();
   if (parameter.is_field_initializer) {
+    if (params->has_named_optional_parameters) {

[Ivan Posva, 2011/11/22 19:58:38]

A comment explaining how this works would be nice, but I guess when you read the
whole thing you do not have it as much out of context.

+      ErrorMsg(parameter.name_pos,
+               "initializing formal parameter cannot be optional");
+    }
     params->has_field_initializer = true;
   }