Exception thrown when taking heap snapshot

[kenzieschmoll]

using dart_developer_timeline.dart sample app

html_dart2js.dart:39929 [zoneGuarded]: Bad state: No element
error @ html_dart2js.dart:39929
log @ logger_html.dart:18
(anonymous) @ logger_helpers.dart:34
_rootRunUnary @ zone.dart:1414
runUnary @ zone.dart:1307
runUnaryGuarded @ zone.dart:1216
[_sendData] @ stream_impl.dart:339
[_add] @ stream_impl.dart:271
[_sendData] @ broadcast_stream_controller.dart:377
add @ broadcast_stream_controller.dart:244
[_publish] @ logger.dart:287
log @ logger.dart:211
severe @ logger.dart:269
_reportError @ app_error_handling.dart:63
(anonymous) @ app_error_handling.dart:54
runBinary @ zone.dart:1665
(anonymous) @ zone.dart:1775
[_processUncaughtError] @ zone.dart:1080
handleUncaughtError @ zone.dart:1284
_propagateToListeners @ future_impl.dart:697
[_complete] @ future_impl.dart:575
(anonymous) @ future.dart:423
_rootRun @ zone.dart:1390
run @ zone.dart:1300
runGuarded @ zone.dart:1208
(anonymous) @ zone.dart:1248
_rootRun @ zone.dart:1398
run @ zone.dart:1300
(anonymous) @ zone.dart:1232
internalCallback @ isolate_helper.dart:48
setTimeout (async)
_isolate_helper.TimerImpl.new @ isolate_helper.dart:55
_createTimer @ async_patch.dart:188
_rootCreateTimer @ zone.dart:1473
createTimer @ zone.dart:1360
new @ timer.dart:54
delayed @ future.dart:421
delayToReleaseUiThread @ utils.dart:250
runBody @ async_patch.dart:84
_async @ async_patch.dart:123
delayToReleaseUiThread @ utils.dart:247
releaseUi @ utils.dart:273
_heapStatistics @ heap.dart:37
(anonymous) @ async_patch.dart:45
_rootRunUnary @ zone.dart:1406
runUnary @ zone.dart:1307
handleValue @ future_impl.dart:147
handleValueCallback @ future_impl.dart:784
_propagateToListeners @ future_impl.dart:813
[_complete] @ future_impl.dart:575
(anonymous) @ future.dart:423
_rootRun @ zone.dart:1390
run @ zone.dart:1300
runGuarded @ zone.dart:1208
(anonymous) @ zone.dart:1248
_rootRun @ zone.dart:1398
run @ zone.dart:1300
(anonymous) @ zone.dart:1232
internalCallback @ isolate_helper.dart:48
setTimeout (async)
_isolate_helper.TimerImpl.new @ isolate_helper.dart:55
_createTimer @ async_patch.dart:188
_rootCreateTimer @ zone.dart:1473
createTimer @ zone.dart:1360
new @ timer.dart:54
delayed @ future.dart:421
delayToReleaseUiThread @ utils.dart:250
runBody @ async_patch.dart:84
_async @ async_patch.dart:123
delayToReleaseUiThread @ utils.dart:247
releaseUi @ utils.dart:273
_setInboundRefs @ spanning_tree.dart:23
runBody @ async_patch.dart:84
_async @ async_patch.dart:123
_setInboundRefs @ spanning_tree.dart:21
buildSpanningTreeAndSetInRefs @ spanning_tree.dart:16
(anonymous) @ async_patch.dart:45
_rootRunUnary @ zone.dart:1406
runUnary @ zone.dart:1307
handleValue @ future_impl.dart:147
handleValueCallback @ future_impl.dart:784
_propagateToListeners @ future_impl.dart:813
[_completeWithValue] @ future_impl.dart:584
(anonymous) @ future_impl.dart:657
_rootRun @ zone.dart:1398
run @ zone.dart:1300
runGuarded @ zone.dart:1208
(anonymous) @ zone.dart:1248
_microtaskLoop @ schedule_microtask.dart:40
_startMicrotaskLoop @ schedule_microtask.dart:49
(anonymous) @ async_patch.dart:177
Promise.then (async)
_scheduleImmediateWithPromise @ async_patch.dart:175
_scheduleImmediate @ async_patch.dart:147
_scheduleAsyncCallback @ schedule_microtask.dart:69
_rootScheduleMicrotask @ zone.dart:1465
scheduleMicrotask @ zone.dart:1353
[_asyncCompleteWithValue] @ future_impl.dart:656
[_asyncComplete] @ future_impl.dart:616
runBody @ async_patch.dart:108
_async @ async_patch.dart:123
event @ gtags.dart:34
_timing @ _analytics_web.dart:540
timeAsync @ _analytics_web.dart:519
(anonymous) @ async_patch.dart:45
_rootRunUnary @ zone.dart:1406
runUnary @ zone.dart:1307
handleValue @ future_impl.dart:147
handleValueCallback @ future_impl.dart:784
_propagateToListeners @ future_impl.dart:813
[_complete] @ future_impl.dart:575
(anonymous) @ future.dart:423
_rootRun @ zone.dart:1390
run @ zone.dart:1300
runGuarded @ zone.dart:1208
(anonymous) @ zone.dart:1248
_rootRun @ zone.dart:1398
run @ zone.dart:1300
(anonymous) @ zone.dart:1232
internalCallback @ isolate_helper.dart:48
setTimeout (async)
_isolate_helper.TimerImpl.new @ isolate_helper.dart:55
_createTimer @ async_patch.dart:188
_rootCreateTimer @ zone.dart:1473
createTimer @ zone.dart:1360
new @ timer.dart:54
delayed @ future.dart:421
delayToReleaseUiThread @ utils.dart:250
runBody @ async_patch.dart:84
_async @ async_patch.dart:123
delayToReleaseUiThread @ utils.dart:247
releaseUi @ utils.dart:273
fromHeapSnapshot @ adapted_heap_data.dart:97
runBody @ async_patch.dart:84
_async @ async_patch.dart:123
fromHeapSnapshot @ adapted_heap_data.dart:91
(anonymous) @ model.dart:127
runBody @ async_patch.dart:84
_async @ async_patch.dart:123
(anonymous) @ model.dart:126
timeAsync @ _analytics_web.dart:506
runBody @ async_patch.dart:84
_async @ async_patch.dart:123
timeAsync @ _analytics_web.dart:498
_adaptSnapshotGaWrapper @ model.dart:123
runBody @ async_patch.dart:84
_async @ async_patch.dart:123
_adaptSnapshotGaWrapper @ model.dart:118
take @ model.dart:113
(anonymous) @ async_patch.dart:45
_rootRunUnary @ zone.dart:1406
runUnary @ zone.dart:1307
handleValue @ future_impl.dart:147
handleValueCallback @ future_impl.dart:784
_propagateToListeners @ future_impl.dart:813
[_completeWithValue] @ future_impl.dart:584
(anonymous) @ future_impl.dart:657
_rootRun @ zone.dart:1398
run @ zone.dart:1300
runGuarded @ zone.dart:1208
(anonymous) @ zone.dart:1248
_microtaskLoop @ schedule_microtask.dart:40
_startMicrotaskLoop @ schedule_microtask.dart:49
(anonymous) @ async_patch.dart:177
Promise.then (async)
_scheduleImmediateWithPromise @ async_patch.dart:175
_scheduleImmediate @ async_patch.dart:147
_scheduleAsyncCallback @ schedule_microtask.dart:69
_rootScheduleMicrotask @ zone.dart:1465
scheduleMicrotask @ zone.dart:1353
[_asyncCompleteWithValue] @ future_impl.dart:656
[_asyncComplete] @ future_impl.dart:616
complete @ future_impl.dart:36
complete @ vm_service.dart:1821
[_processResponse] @ vm_service.dart:2455
[_processMessageStr] @ vm_service.dart:2434
[_processMessage] @ vm_service.dart:2386
_rootRunUnary @ zone.dart:1406
runUnary @ zone.dart:1307
runUnaryGuarded @ zone.dart:1216
[_sendData] @ stream_impl.dart:339
[_add] @ stream_impl.dart:271
[_add] @ stream_pipe.dart:123
[_handleData] @ stream_pipe.dart:253
[_handleData] @ stream_pipe.dart:153
_rootRunUnary @ zone.dart:1406
runUnary @ zone.dart:1307
runUnaryGuarded @ zone.dart:1216
[_sendData] @ stream_impl.dart:339
[_add] @ stream_impl.dart:271
[_sendData] @ stream_controller.dart:774
[_sendData] @ stream_controller.dart:807
[_add] @ stream_controller.dart:648
add @ stream_controller.dart:596
_rootRunUnary @ zone.dart:1406
runUnary @ zone.dart:1307
runUnaryGuarded @ zone.dart:1216
[_sendData] @ stream_impl.dart:339
[_add] @ stream_impl.dart:271
[_sendData] @ stream_controller.dart:774
[_sendData] @ stream_controller.dart:807
[_add] @ stream_controller.dart:648
add @ stream_controller.dart:596
add @ stream_controller.dart:866
add @ guarantee_channel.dart:125
(anonymous) @ html.dart:111
_checkAndCall @ operations.dart:367
dcall @ operations.dart:372
(anonymous) @ html_dart2js.dart:37235
_rootRunUnary @ zone.dart:1414
runUnary @ zone.dart:1307
runUnaryGuarded @ zone.dart:1216
(anonymous) @ zone.dart:1253
errors.dart:288 Uncaught (in promise) Error: Bad state: No element
    at Object.throw_ [as throw] (errors.dart:288:49)
    at [dartx.reduce] (js_array.dart:246:60)
    at [_setSelections] (diff_pane_controller.dart:423:32)
    at [_updateValues] (diff_pane_controller.dart:349:5)
    at diff_pane_controller.DiffPaneController.new.takeSnapshot (diff_pane_controller.dart:78:13)
    at takeSnapshot.next (<anonymous>)
    at async_patch.dart:45:50
    at _rootRunUnary (zone.dart:1406:47)
    at async._CustomZone.new.runUnary (zone.dart:1307:19)
    at _FutureListener.thenAwait.handleValue (future_impl.dart:147:18)
    at handleValueCallback (future_impl.dart:784:44)
    at _Future._propagateToListeners (future_impl.dart:813:13)
    at [_complete] (future_impl.dart:575:7)
    at future.dart:423:15
    at _rootRun (zone.dart:1390:47)
    at async._CustomZone.new.run (zone.dart:1300:19)
    at async._CustomZone.new.runGuarded (zone.dart:1208:7)
    at zone.dart:1248:23
    at _rootRun (zone.dart:1398:13)
    at async._CustomZone.new.run (zone.dart:1300:19)
    at zone.dart:1232:23
    at internalCallback (isolate_helper.dart:48:19)

[polina-c]

When run from macos DevTools exception looks like this:
flutter: [ERROR]: [zoneGuarded]: Bad state: No element
flutter: [ERROR]: [PlatformDispatcher]: Bad state: No element
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Bad state: No element
#0 ListMixin.reduce (dart:collection/list.dart:223:22)
#1 DerivedData._setSelections
diff_pane_controller.dart:423
#2 DerivedData._updateValues
diff_pane_controller.dart:349
#3 DiffPaneController.takeSnapshot
diff_pane_controller.dart:78

[polina-c]

Exception is caused by the method takeSnapshot and happens in flutter/runtime/dart_vm_initializer.cc(41).

[polina-c]

Mitigation steps:

1. Create issue for vm team.
2. Fail gracefully