nullable value fix
nullable value fix


01:03 +96 -2: integration core config excludes [E]

  type 'Null' is not a subtype of type 'Object'

  package:analyzer/src/lint/config.dart 123:32                   _LintConfig._parseYaml.<fn>
  dart:collection-patch/compact_hash.dart 397:8                  _LinkedHashMapMixin.forEach
  dart:collection/maps.dart 342:10                               MapView.forEach
  package:analyzer/src/lint/config.dart 115:16                   _LintConfig._parseYaml
  package:analyzer/src/lint/config.dart 110:7                    _LintConfig._parse
  package:analyzer/src/lint/config.dart 36:22                    new LintConfig.parse
  package:linter/src/cli.dart 97:29                              runLinter
  package:linter/src/cli.dart 43:9                               run
  test/integration_test.dart 71:15                               coreTests.<fn>.<fn>.<fn>
  test/integration_test.dart 70:24                               coreTests.<fn>.<fn>.<fn>
  package:test_api/src/backend/declarer.dart 200:19              Declarer.test.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1294:19                                   _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 51:8                         _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                      Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1354:13                                   _rootRun
  dart:async/zone.dart 1258:19                                   _CustomZone.run
  dart:async/zone.dart 1789:10                                   _runZoned
  dart:async/zone.dart 1711:10                                   runZoned
  package:test_api/src/backend/invoker.dart 228:5                Invoker.waitForOutstandingCallbacks
  package:test_api/src/backend/invoker.dart 383:17               Invoker._onRun.<fn>.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1286:19                                   _CustomZone.registerUnaryCallback
  dart:async-patch/async_patch.dart 40:23                        _asyncThenWrapperHelper
  package:test_api/src/backend/invoker.dart                      Invoker._onRun.<fn>.<fn>.<fn>
  dart:async/zone.dart 1354:13                                   _rootRun
  dart:async/zone.dart 1258:19                                   _CustomZone.run
  dart:async/zone.dart 1789:10                                   _runZoned
  dart:async/zone.dart 1711:10                                   runZoned
  package:test_api/src/backend/invoker.dart 370:9                Invoker._onRun.<fn>.<fn>
  package:test_api/src/backend/invoker.dart 415:15               Invoker._guardIfGuarded
  package:test_api/src/backend/invoker.dart 369:7                Invoker._onRun.<fn>
  package:stack_trace/src/chain.dart 94:24                       Chain.capture.<fn>
  dart:async/zone.dart 1354:13                                   _rootRun
  dart:async/zone.dart 1258:19                                   _CustomZone.run
  dart:async/zone.dart 1789:10                                   _runZoned
  dart:async/zone.dart 1711:10                                   runZoned
  package:stack_trace/src/chain.dart 92:12                       Chain.capture
  package:test_api/src/backend/invoker.dart 368:11               Invoker._onRun
  package:test_api/src/backend/live_test_controller.dart 153:11  LiveTestController.run
  dart:async/future.dart 198:37                                  new Future.microtask.<fn>
  dart:async/zone.dart 1346:47                                   _rootRun
  dart:async/zone.dart 1258:19                                   _CustomZone.run
  dart:async/zone.dart 1162:7                                    _CustomZone.runGuarded
  dart:async/zone.dart 1202:23                                   _CustomZone.bindCallbackGuarded.<fn>
  dart:async/zone.dart 1354:13                                   _rootRun
  dart:async/zone.dart 1258:19                                   _CustomZone.run
  dart:async/zone.dart 1162:7                                    _CustomZone.runGuarded
  dart:async/zone.dart 1202:23                                   _CustomZone.bindCallbackGuarded.<fn>
  dart:async/schedule_microtask.dart 40:21                       _microtaskLoop
  dart:async/schedule_microtask.dart 49:5                        _startMicrotaskLoop
  dart:isolate-patch/isolate_patch.dart 120:13                   _runPendingImmediateCallback
  dart:isolate-patch/timer_impl.dart 402:11                      _Timer._runTimers
  dart:isolate-patch/timer_impl.dart 426:5                       _Timer._handleMessage
  dart:isolate-patch/isolate_patch.dart 184:12                   _RawReceivePortImpl._handleMessage





Change-Id: I33e31d58432d34dc3e95bc5d7db7b40e6311be89
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/186260
Reviewed-by: Brian Wilkerson <1f7641b6b14c52b9163524ab8d9aabff80176f21@google.com>
Commit-Queue: Phil Quitslund <3faecbdd7b7be83f493f037bf1d597e6bb9d0848@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk