Update listener error handling.

pkg/compiler/lib/src/parser/member_listener.dart

Index: pkg/compiler/lib/src/parser/member_listener.dart
diff --git a/pkg/compiler/lib/src/parser/member_listener.dart b/pkg/compiler/lib/src/parser/member_listener.dart
index fbf25fb19fdc34f90f0c720bd25f4291d891cf5a..ce6b0744845282f2bb29de52164cf9119377240e 100644
--- a/pkg/compiler/lib/src/parser/member_listener.dart
+++ b/pkg/compiler/lib/src/parser/member_listener.dart
@@ -77,7 +77,7 @@ class MemberListener extends NodeListener {
     Element memberElement;
     if (isConstructor) {
       if (getOrSet != null) {
-        recoverableError(getOrSet, 'illegal modifier');
+        recoverableError(reporter.spanFromToken(getOrSet), 'illegal modifier');
       }
       memberElement = new PartialConstructorElement(name, beginToken, endToken,
           ElementKind.GENERATIVE_CONSTRUCTOR, method.modifiers, enclosingClass);