Close #128113 

Fun fact: This is caught by monkey testing I have written (will soon be open sourced as well) that runs on my app!

Without the fix, the test fails as expected:

<details>

```
(base) ➜  flutter git:(feat/text-field-npe) /Volumes/MyExternal/ExternalRefCode/flutter/bin/flutter test test/material/text_field_test.dart --name 'changes from default'
00:06 +0: context menu contextMenuBuilder changes from default to null                                                                
══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
The following _TypeError was thrown building
_OverlayEntryWidget-[LabeledGlobalKey<_OverlayEntryWidgetState>#e3717](state:
_OverlayEntryWidgetState#7666a):
Null check operator used on a null value

When the exception was thrown, this was the stack:
#0      EditableTextState._createSelectionOverlay.<anonymous closure> (package:flutter/src/widgets/editable_text.dart:3331:43)
#1      SelectionOverlay.showToolbar.<anonymous closure> (package:flutter/src/widgets/text_selection.dart:1357:36)
#2      ContextMenuController.show.<anonymous closure> (package:flutter/src/widgets/context_menu_controller.dart:65:54)
#3      _OverlayEntryWidgetState.build (package:flutter/src/widgets/overlay.dart:351:36)
#4      StatefulElement.build (package:flutter/src/widgets/framework.dart:5198:27)
#5      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5086:15)
#6      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#7      Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#8      StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#9      Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#10     RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:6093:32)
#11     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6595:17)
#12     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#13     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#14     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#15     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#16     StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#17     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#18     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#19     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#20     ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#21     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#22     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#23     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#24     ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#25     _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:107:11)
#26     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#27     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#28     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#29     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#30     StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#31     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#32     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#33     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#34     ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#35     _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:107:11)
#36     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#37     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#38     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#39     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#40     StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#41     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#42     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#43     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#44     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#45     StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6442:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6442:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#52     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#53     ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#54     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#55     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#56     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#57     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#58     StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#59     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#60     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#61     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#62     ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#63     _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:107:11)
#64     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#65     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6442:14)
#66     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#67     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#68     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#69     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#70     StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#73     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#74     ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#75     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#76     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#77     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#78     ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#79     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#80     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#81     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#82     ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#83     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#84     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#86     ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#90     StatelessElement.update (package:flutter/src/widgets/framework.dart:5162:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#93     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#94     ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#95     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#96     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#97     Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#98     StatelessElement.update (package:flutter/src/widgets/framework.dart:5162:5)
#99     Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#100    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#101    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#102    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#103    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#104    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#105    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#106    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#107    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#108    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#109    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#110    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#111    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#112    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#113    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#114    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#116    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#119    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#120    StatelessElement.update (package:flutter/src/widgets/framework.dart:5162:5)
#121    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#122    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#123    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#124    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#125    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#126    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6442:14)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5162:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#134    StatelessElement.update (package:flutter/src/widgets/framework.dart:5162:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#136    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#137    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#138    StatelessElement.update (package:flutter/src/widgets/framework.dart:5162:5)
#139    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#140    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#141    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#142    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#143    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#144    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#145    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#146    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6442:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#150    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#151    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#152    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#153    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#154    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#155    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6442:14)
#156    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#157    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#158    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#159    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#160    _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:107:11)
#161    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#162    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#163    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#164    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#165    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#168    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#169    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#170    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#171    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#172    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#173    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#174    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#175    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#176    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#177    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#178    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#179    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#180    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#181    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6442:14)
#182    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#183    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#184    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#185    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#186    _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:107:11)
#187    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#188    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#189    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#190    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#191    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#192    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#193    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#194    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#195    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#196    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#197    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#198    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#199    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#200    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#201    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#202    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#203    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#204    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#205    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#206    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#207    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6442:14)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#211    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#212    _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:107:11)
#213    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#214    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#215    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#216    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#217    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#218    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#219    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#220    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#221    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#222    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#223    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#224    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#225    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#226    StatelessElement.update (package:flutter/src/widgets/framework.dart:5162:5)
#227    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#228    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6442:14)
#229    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#230    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#231    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#232    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#233    _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:107:11)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#235    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#236    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#237    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#238    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#239    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#240    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#241    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#242    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#243    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#244    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#245    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#246    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#247    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#248    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#249    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#250    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#251    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#252    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#253    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#254    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#255    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#256    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#257    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#258    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#259    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#260    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#261    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#262    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#263    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#264    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#265    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#266    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#267    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#268    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#269    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#270    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#271    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#272    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#273    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#274    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#275    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#276    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#277    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6442:14)
#278    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#279    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#280    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#281    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#282    _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:107:11)
#283    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#284    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#285    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#286    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#287    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#288    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#289    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#290    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#291    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#292    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#293    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#294    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#295    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#296    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#297    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#298    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#299    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#300    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#301    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#302    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#303    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#304    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#305    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#306    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#307    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#308    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#309    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#310    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#311    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#312    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#313    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#314    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#315    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#316    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#317    StatelessElement.update (package:flutter/src/widgets/framework.dart:5162:5)
#318    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#319    RenderObjectToWidgetElement._rebuild (package:flutter/src/widgets/binding.dart:1253:16)
#320    RenderObjectToWidgetElement.update (package:flutter/src/widgets/binding.dart:1230:5)
#321    RenderObjectToWidgetElement.performRebuild (package:flutter/src/widgets/binding.dart:1244:7)
#322    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#323    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2780:19)
#324    AutomatedTestWidgetsFlutterBinding.drawFrame (package:flutter_test/src/binding.dart:1396:19)
#325    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:358:5)
#326    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1297:15)
#327    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1227:9)
#328    AutomatedTestWidgetsFlutterBinding.pump.<anonymous closure> (package:flutter_test/src/binding.dart:1246:9)
#331    TestAsyncUtils.guard (package:flutter_test/src/test_async_utils.dart:68:41)
#332    AutomatedTestWidgetsFlutterBinding.pump (package:flutter_test/src/binding.dart:1232:27)
#333    WidgetTester._pumpWidget (package:flutter_test/src/widget_tester.dart:587:20)
#334    WidgetTester.pumpWidget.<anonymous closure> (package:flutter_test/src/widget_tester.dart:572:14)
#337    TestAsyncUtils.guard (package:flutter_test/src/test_async_utils.dart:68:41)
#338    WidgetTester.pumpWidget (package:flutter_test/src/widget_tester.dart:571:27)
#339    main.<anonymous closure>.<anonymous closure> (file:///Volumes/MyExternal/ExternalRefCode/flutter/packages/flutter/test/material/text_field_test.dart:15687:20)
<asynchronous suspension>
<asynchronous suspension>
(elided 5 frames from dart:async and package:stack_trace)

════════════════════════════════════════════════════════════════════════════════════════════════════
00:06 +0 -1: context menu contextMenuBuilder changes from default to null [E]                                                         
  Test failed. See exception logs above.
  The test description was: contextMenuBuilder changes from default to null
  
To run this test again: /Volumes/MyExternal/ExternalRefCode/flutter/bin/cache/dart-sdk/bin/dart test /Volumes/MyExternal/ExternalRefCode/flutter/packages/flutter/test/material/text_field_test.dart -p vm --plain-name 'context menu contextMenuBuilder changes from default to null'
00:06 +0 -1: Some tests failed.                                                                                                       
(base) ➜  flutter git:(feat/text-field-npe) 

```

</details>