Not Showing text while entering text from keyboard

[gssinghgautam]

════════ Exception caught by rendering library ═════════════════════════════════════════════════════
The following assertion was thrown during paint():
'dart:ui/text.dart': Failed assertion: line 1372: '': is not true.

Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
https://github.com/flutter/flutter/issues/new?template=BUG.md

The relevant error-causing widget was:
_Editable-[GlobalKey#67361] file:///Users/kunwar/Documents/flutter/extended_text_field/lib/src/extended_editable_text.dart:1552:20
When the exception was thrown, this was the stack:
#2 new TextPosition (dart:ui/text.dart:1372:15)
#3 ExtendedRenderEditable._updateSelectionExtentsVisibility (package:extended_text_field/src/extended_render_editable.dart:283:7)
#4 ExtendedRenderEditable._paintContents (package:extended_text_field/src/extended_render_editable.dart:1871:7)
#5 ExtendedRenderEditable.paint (package:extended_text_field/src/extended_render_editable.dart:1930:7)
#6 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2219:7)
...
The following RenderObject was being processed when the exception was fired: ExtendedRenderEditable#5c1eb relayoutBoundary=up15
... parentData: (can use size)
... constraints: BoxConstraints(w=342.0, 0.0<=h<=Infinity)
... size: Size(342.0, 19.0)
... cursorColor: Color(0xff2196f3)
... showCursor: ValueNotifier#a39a3(true)
... maxLines: null
... minLines: null
... selectionColor: Color(0xff90caf9)
... textScaleFactor: 1.0
... locale: en_US
... selection: TextSelection(baseOffset: 1, extentOffset: 1, affinity: null, isDirectional: false)
... offset: ScrollPositionWithSingleContext#25b08(offset: 0.0, range: 0.0..0.0, viewport: 19.0, ScrollableState, BouncingScrollPhysics, IdleScrollActivity#c7609, ScrollDirection.idle)
RenderObject: ExtendedRenderEditable#5c1eb relayoutBoundary=up15
parentData: (can use size)
constraints: BoxConstraints(w=342.0, 0.0<=h<=Infinity)
size: Size(342.0, 19.0)
cursorColor: Color(0xff2196f3)
showCursor: ValueNotifier#a39a3(true)
maxLines: null
minLines: null
selectionColor: Color(0xff90caf9)
textScaleFactor: 1.0
locale: en_US
selection: TextSelection(baseOffset: 1, extentOffset: 1, affinity: null, isDirectional: false)
offset: ScrollPositionWithSingleContext#25b08(offset: 0.0, range: 0.0..0.0, viewport: 19.0, ScrollableState, BouncingScrollPhysics, IdleScrollActivity#c7609, ScrollDirection.idle)
... text: TextSpan
... debugLabel: (englishLike subhead 2014).merge(blackCupertino subhead)
... inherit: false
... color: Color(0xdd000000)
... family: .SF UI Text
... size: 16.0
... weight: 400
... baseline: alphabetic
... decoration: TextDecoration.none
... : TextSpan
... debugLabel: (englishLike subhead 2014).merge(blackCupertino subhead)
... inherit: false
... color: Color(0xdd000000)
... family: .SF UI Text
... size: 16.0
... weight: 400
... baseline: alphabetic
... decoration: TextDecoration.none
... "@"
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[gliese667c]

相同问题。更新 flutter 到 stable 最新，extended_text_field 0.4.6