Element no longer implements AnalysisTarget

pkg/analyzer/lib/src/generated/incremental_resolver.dart

Index: pkg/analyzer/lib/src/generated/incremental_resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/incremental_resolver.dart b/pkg/analyzer/lib/src/generated/incremental_resolver.dart
index f869228ed281874ee95078848302594a3103e6ec..e0efaba18e0f475035c0042a9f0c56361de93c48 100644
--- a/pkg/analyzer/lib/src/generated/incremental_resolver.dart
+++ b/pkg/analyzer/lib/src/generated/incremental_resolver.dart
@@ -2065,7 +2065,9 @@ class _ElementOffsetUpdater extends GeneralizingElementVisitor {
     // name offset
     int nameOffset = element.nameOffset;
     if (nameOffset > updateOffset) {
-      cache.remove(element);
+      if (element is AnalysisTarget) {
+        cache.remove(element as AnalysisTarget);

[Brian Wilkerson, 2016/02/01 15:43:20]

Is the cast necessary? I would have thought that type propagation would be
sufficient.

+      }
       (element as ElementImpl).nameOffset = nameOffset + updateDelta;
     }
     // visible range
@@ -2075,7 +2077,6 @@ class _ElementOffsetUpdater extends GeneralizingElementVisitor {
         int newOffset = visibleRange.offset + updateDelta;
         int length = visibleRange.length;
         if (element is FunctionElementImpl) {
-          cache.remove(element);
           element.setVisibleRange(newOffset, length);
         } else if (element is LocalVariableElementImpl) {
           cache.remove(element);