Fix for parsing EmptyFunctionBody with Fasta.

pkg/front_end/lib/src/fasta/kernel/body_builder.dart

Index: pkg/front_end/lib/src/fasta/kernel/body_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
index b460e20609e4e450d9450d397a1c7d61ba9b413f..efab70be6011ac455c689751cd835d90483ed2f5 100644
--- a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
@@ -858,6 +858,12 @@ class BodyBuilder extends ScopeListener<JumpTarget> implements BuilderHelper {
   }
 
   @override
+  void endEmptyFunctionBody(Token semicolon) {
+    debugEvent("ExpressionFunctionBody");
+    endFunctionBody(0, null, semicolon);
+  }
+
+  @override
   void endExpressionFunctionBody(Token arrowToken, Token endToken) {
     debugEvent("ExpressionFunctionBody");
     endReturnStatement(true, arrowToken, endToken);