Report StaticWarningCode.UNDEFINED_IDENTIFIER when name is hidden, but not defined yet in block.

editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticWarningCodeTest.java

Index: editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticWarningCodeTest.java
diff --git a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticWarningCodeTest.java b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticWarningCodeTest.java
index bc82276aa77f4bffefbba63c0bc98ffd28e0cffe..0c664b468959ab9f3d179b55a5ae0022dff1e93c 100644
--- a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticWarningCodeTest.java
+++ b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/StaticWarningCodeTest.java
@@ -2086,6 +2086,44 @@ public class StaticWarningCodeTest extends ResolverTestCase {
     verify(source);
   }
 
+  public void test_undefinedIdentifier_hideInBlock_function() throws Exception {
+    Source source = addSource(createSource(//
+        "var v = 1;",
+        "main() {",
+        "  print(v);",
+        "  v() {}",
+        "}",
+        "print(x) {}"));
+    resolve(source);
+    assertErrors(StaticWarningCode.UNDEFINED_IDENTIFIER);
+  }
+
+  public void test_undefinedIdentifier_hideInBlock_local() throws Exception {
+    Source source = addSource(createSource(//
+        "var v = 1;",
+        "main() {",
+        "  print(v);",
+        "  var v = 2;",
+        "}",
+        "print(x) {}"));
+    resolve(source);
+    assertErrors(StaticWarningCode.UNDEFINED_IDENTIFIER);
+  }
+
+  public void test_undefinedIdentifier_hideInBlock_subBlock() throws Exception {
+    Source source = addSource(createSource(//
+        "var v = 1;",
+        "main() {",
+        "  {",
+        "    print(v);",
+        "  }",
+        "  var v = 2;",
+        "}",
+        "print(x) {}"));
+    resolve(source);
+    assertErrors(StaticWarningCode.UNDEFINED_IDENTIFIER);
+  }
+
   public void test_undefinedIdentifier_initializer() throws Exception {
     Source source = addSource(createSource(//
     "var a = b;"));