Handle most qualified sends.

pkg/compiler/lib/src/resolution/resolution_common.dart

Index: pkg/compiler/lib/src/resolution/resolution_common.dart
diff --git a/pkg/compiler/lib/src/resolution/resolution_common.dart b/pkg/compiler/lib/src/resolution/resolution_common.dart
index 5d3efcb717ec50ad0a56ccbf22a4ec89193afb79..cb045cf1c5a87774b25b87aef6d63abf20efa3f2 100644
--- a/pkg/compiler/lib/src/resolution/resolution_common.dart
+++ b/pkg/compiler/lib/src/resolution/resolution_common.dart
@@ -13,7 +13,13 @@ class ResolverTask extends CompilerTask {
 
   WorldImpact resolve(Element element) {
     return measure(() {
-      if (Elements.isErroneous(element)) return null;
+      if (Elements.isErroneous(element)) {
+        // TODO(johnniwinther): Add a predicate for this.
+        assert(invariant(element, element is! ErroneousElement,
+            message: "Element $element expected to have parse errors."));
+        _ensureTreeElements(element);
+        return const WorldImpact();
+      }
 
       WorldImpact processMetadata([WorldImpact result]) {
         for (MetadataAnnotation metadata in element.metadata) {