Thread 0 main threadRPCError: ext.flutter.debugDumpRenderTree: (-32000) Server error{"exception":"Unexpected null value.","stack":"C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 251:49      throw_\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 528:63  nullCheck\npackages/flutter/src/rendering/stack.dart 743:26                                                                               debugDescribeChildren\npackages/flutter/src/foundation/diagnostics.dart 3041:48                                                                       getChildren\npackages/flutter/src/foundation/diagnostics.dart 1187:42                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1376:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1376:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1376:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1376:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1355:33                                                                       [_debugRender]\npackages/flutter/src/foundation/diagnostics.dart 1121:14                                                                       render\npackages/flutter/src/foundation/diagnostics.dart 1775:20                                                                       <fn>\npackages/flutter/src/foundation/diagnostics.dart 1782:14                                                                       toStringDeep\npackages/flutter/src/foundation/diagnostics.dart 3555:32                                                                       toStringDeep\npackages/flutter/src/rendering/object.dart 3008:33                                                                             toStringDeep\npackages/flutter/src/rendering/binding.dart 154:67                                                                             <fn>\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 84:54                runBody\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 123:5                _async\npackages/flutter/src/rendering/binding.dart 153:40                                                                             <fn>\npackages/flutter/src/foundation/binding.dart 851:32                                                                            <fn>\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 45:50                <fn>\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/zone.dart 1685:54                                              runUnary\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/future_impl.dart 147:18                                        handleValue\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/future_impl.dart 766:44                                        handleValueCallback\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/future_impl.dart 795:13                                        _propagateToListeners\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/future_impl.dart 557:7                                         [_complete]\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/future.dart 420:15                                             <fn>\nC:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/isolate_helper.dart 48:19           internalCallback\n","method":"ext.flutter.debugDumpRenderTree"}content_copy
at new _OutstandingRequest(vm_service.dart:1734)
at VmService._call(vm_service.dart:2245)
at VmService.callServiceExtension(vm_service.dart:2216)
at FlutterVmService._checkedCallServiceExtension(vmservice.dart:776)
at FlutterVmService.invokeFlutterExtensionRpcRaw(vmservice.dart:795)
at FlutterVmService.flutterDebugDumpRenderTree(vmservice.dart:554)
at ResidentHandlers.debugDumpRenderTree(resident_runner.dart:668)
at <asynchronous gap>(async)
at TerminalHandler.processTerminalInput(resident_runner.dart:1685)
at <asynchronous gap>(async)