Null check operator is used on a null value when long press a link

[tschiekdev]

Is there an existing issue for this?

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Flutter Quill version

10.7.5

Steps to reproduce

dont know

Expected results

no error

Actual results

Null check operator used on a null value

#0 _TextLineState._longPressLink (package:flutter_quill/src/editor/widgets/text/text_line.dart:656)#1 _TextLineState._getRecognizer. (package:flutter_quill/src/editor/widgets/text/text_line.dart:623)
#2 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:351)
#3 LongPressGestureRecognizer._checkLongPressStart (package:flutter/src/gestures/long_press.dart:709)
#4 LongPressGestureRecognizer.didExceedDeadline (package:flutter/src/gestures/long_press.dart:610)
#5 PrimaryPointerGestureRecognizer.didExceedDeadlineWithEvent (package:flutter/src/gestures/recognizer.dart:731)
#6 PrimaryPointerGestureRecognizer.addAllowedPointer. (package:flutter/src/gestures/recognizer.dart:674)
#7 _rootRun (dart:async/zone.dart:1391)
#8 _CustomZone.run (dart:async/zone.dart:1301)
#9 _CustomZone.runGuarded (dart:async/zone.dart:1209)
#10 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1249)
#11 _rootRun (dart:async/zone.dart:1399)
#12 _CustomZone.run (dart:async/zone.dart:1301)
#13 _CustomZone.bindCallback. (dart:async/zone.dart:1233)
#14 Timer._createTimer. (dart:async-patch/timer_patch.dart:18)
#15 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:398)
#16 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429)
#17 _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:184)

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[EchoEllet]

This line is causing the issue. Need to handle this in a better way without using the null check operator, if we're not sure why then should use assert or throw an exception with a clear message instead of return and then causing unexpected behavior that's more difficult to trace.

This commit is related.

I would avoid using dynamic in Dart (and any other language) when possible which is something that's used in Delta and Attribute, instead manually cast and handle exceptions.