[flutter_markdown] Null check operator used on a null value in MarkdownBuilder._buildRichText.<fn>(builder.dart:957) #149817
Description
(Same issue as #146282 which was reported back in April and closed by bot)
After updating my production app I've been getting crashlytics reports:
Fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: Null check operator used on a null value. Error thrown .
at MarkdownBuilder._buildRichText.<fn>(builder.dart:957)
at _SelectableTextState._handleSelectionChanged(selectable_text.dart:628)
at EditableTextState._handleSelectionChanged(editable_text.dart:3976)
at EditableTextState._formatAndSetValue(editable_text.dart:4184)
at EditableTextState.userUpdateTextEditingValue(editable_text.dart:4554)
at RenderEditable._setTextEditingValue(editable.dart:719)
at RenderEditable._setSelection(editable.dart:738)
at RenderEditable.selectWordsInRange(editable.dart:2117)
at RenderEditable.selectWord(editable.dart:2098)
at _SelectableTextSelectionGestureDetectorBuilder.onSingleLongTapStart(selectable_text.dart:105)
at _TextSelectionGestureDetectorState._handleLongPressStart(text_selection.dart:3332)
at LongPressGestureRecognizer._checkLongPressStart.<fn>(long_press.dart:703)
at GestureRecognizer.invokeCallback(recognizer.dart:344)
at LongPressGestureRecognizer._checkLongPressStart(long_press.dart:703)
at LongPressGestureRecognizer.didExceedDeadline(long_press.dart:607)
at PrimaryPointerGestureRecognizer.didExceedDeadlineWithEvent(recognizer.dart:724)
at PrimaryPointerGestureRecognizer.addAllowedPointer.<fn>(recognizer.dart:667)
Fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: Null check operator used on a null value. Error thrown .
at MarkdownBuilder._buildRichText.<fn>(builder.dart:957)
at _SelectableTextState._handleSelectionChanged(selectable_text.dart:628)
at EditableTextState._handleSelectionChanged(editable_text.dart:3976)
at EditableTextState._formatAndSetValue(editable_text.dart:4184)
at EditableTextState.userUpdateTextEditingValue(editable_text.dart:4554)
at RenderEditable._setTextEditingValue(editable.dart:719)
at RenderEditable._setSelection(editable.dart:738)
at RenderEditable.selectPositionAt(editable.dart:2088)
at RenderEditable.selectPosition(editable.dart:2065)
at _SelectableTextSelectionGestureDetectorBuilder.onSingleTapUp(selectable_text.dart:145)
at _TextSelectionGestureDetectorState._handleTapUp(text_selection.dart:3299)
at BaseTapAndDragGestureRecognizer._checkTapUp.<fn>(tap_and_drag.dart:1198)
at GestureRecognizer.invokeCallback(recognizer.dart:344)
at BaseTapAndDragGestureRecognizer._checkTapUp(tap_and_drag.dart:1198)
at BaseTapAndDragGestureRecognizer.acceptGesture(tap_and_drag.dart:996)
at GestureArenaManager.sweep(arena.dart:167)
at GestureBinding.handleEvent(binding.dart:499)
at GestureBinding.dispatchEvent(binding.dart:475)
at RendererBinding.dispatchEvent(binding.dart:425)
at GestureBinding._handlePointerEventImmediately(binding.dart:420)
at GestureBinding.handlePointerEvent(binding.dart:383)
at GestureBinding._flushPointerEventQueue(binding.dart:330)
at GestureBinding._handlePointerDataPacket(binding.dart:299)
I'm unsure where in my app this is being generated as the stacktrace seems entirely outside of my codebase. So until these customers contact me and report where in the app the problem is occurring I'm unable to create a reproducible example. As this issue was reported back in #146282 with the same error it seems to be a genuine bug. They highlighted the code:
It looks like onSelectionChanged is not always set?
Flutter doctor
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