Issue 9845. Compare runtime types using ==.

pkg/analyzer_experimental/lib/src/generated/ast.dart

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.ast;
 
 import 'dart:collection';
 import 'java_core.dart';
 import 'java_engine.dart';
 import 'error.dart';
 import 'source.dart' show LineInfo;
@@ skipping 11698 matching lines @@
     try {
       node.accept(this);
     } on NodeLocator_NodeFoundException catch (exception) {
     } catch (exception) {
       AnalysisEngine.instance.logger.logInformation2("Unable to locate element at offset (${_startOffset} - ${_endOffset})", exception);
       return null;
     }
     return _foundNode;
   }
   Object visitNode(ASTNode node) {
+    int start = node.offset;
+    int end = start + node.length;
+    if (end < _startOffset) {
+      return null;
+    }
+    if (start > _endOffset) {
+      return null;
+    }
     try {
       node.visitChildren(this);
     } on NodeLocator_NodeFoundException catch (exception) {
       throw exception;
     } catch (exception) {
       AnalysisEngine.instance.logger.logInformation2("Exception caught while traversing an AST structure.", exception);
     }
-    int start = node.offset;
-    int end = start + node.length;
     if (start <= _startOffset && _endOffset <= end) {
       _foundNode = node;
       throw new NodeLocator_NodeFoundException();
     }
     return null;
   }
 }
 /**
  * Instances of the class {@code NodeFoundException} are used to cancel visiting after a node has
  * been found.
@@ skipping 1547 matching lines @@
     return elements[elements.length - 1].endToken;
   }
   /**
    * Return the node that is the parent of each of the elements in the list.
    * @return the node that is the parent of each of the elements in the list
    */
   ASTNode getOwner() {
     return owner;
   }
 }