Use the function name as the location for a missing return error.

pkg/analyzer/test/src/task/strong/checker_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.test.src.task.strong.checker_test;
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'strong_test_helper.dart';
 
@@ skipping 2335 matching lines @@
   int m1() => 42;
 }
 class C extends B {
   /*error:IMPLICIT_DYNAMIC_RETURN*/m0() => 123;
   m1() => 123;
   dynamic m2() => 'hi';
 }
 
 // accessors
 set x(int value) {}
-/*error:IMPLICIT_DYNAMIC_RETURN*/get y0 => 42;
+get /*error:IMPLICIT_DYNAMIC_RETURN*/y0 => 42;
 dynamic get y1 => 42;
 
 // function typed formals
 void ftf0(/*error:IMPLICIT_DYNAMIC_RETURN*/f(int x)) {}
 void ftf1(dynamic f(int x)) {}
 
 // function expressions
 var fe0 = (int x) => x as dynamic;
 var fe1 = (int x) => x;
     ''');
@@ skipping 1649 matching lines @@
     // Regression test for https://github.com/dart-lang/sdk/issues/25069
     checkFile('''
 typedef int Foo();
 void foo() {}
 void main () {
   Foo x = /*error:INVALID_ASSIGNMENT,info:USE_OF_VOID_RESULT*/foo();
 }
 ''');
   }
 }