Fix for local function element identifiers.

pkg/analyzer/lib/src/dart/element/element.dart

Index: pkg/analyzer/lib/src/dart/element/element.dart
diff --git a/pkg/analyzer/lib/src/dart/element/element.dart b/pkg/analyzer/lib/src/dart/element/element.dart
index db740a8fddf1a89cde87a0cd045fcce4eff208a5..3a8c07fc0423334f5be5742a7d0b99e6f8de9a6f 100644
--- a/pkg/analyzer/lib/src/dart/element/element.dart
+++ b/pkg/analyzer/lib/src/dart/element/element.dart
@@ -4424,7 +4424,10 @@ class FunctionElementImpl extends ExecutableElementImpl
   String get identifier {
     String identifier = super.identifier;
     if (!isStatic) {
-      identifier += "@$nameOffset";
+      int enclosingOffset =
+          enclosingElement != null ? enclosingElement.nameOffset : 0;
+      int delta = nameOffset - enclosingOffset;
+      identifier += "@$delta";
     }
     return identifier;
   }