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Contacts are not getting fetched in my flutter application #26513

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Yogita75 opened this issue Jan 14, 2019 · 2 comments
Closed

Contacts are not getting fetched in my flutter application #26513

Yogita75 opened this issue Jan 14, 2019 · 2 comments

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@Yogita75
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Yogita75 commented Jan 14, 2019 •
edited by zoechi
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Logs

Launching lib/main.dart on Redmi Note 3 in debug mode...
Initializing gradle...
Resolving dependencies...
Gradle task 'assembleDebug'...
Built build/app/outputs/apk/debug/app-debug.apk.
Syncing files to device Redmi Note 3...
I/flutter (16939): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
I/flutter (16939): The following assertion was thrown building MyHomePage(dirty, state: _MyHomePageState#36900):
I/flutter (16939): type 'Future<dynamic>' is not a subtype of type '() => void'
I/flutter (16939): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter (16939): more information in this error message to help you determine and fix the underlying cause.
I/flutter (16939): In either case, please report this assertion by filing a bug on GitHub:
I/flutter (16939):   https://github.com/flutter/flutter/issues/new?template=BUG.md
I/flutter (16939): When the exception was thrown, this was the stack:
I/flutter (16939): #0      _MyHomePageState.build (package:fluttercontacts/main.dart:42:20)
I/flutter (16939): #1      StatefulElement.build (package:flutter/src/widgets/framework.dart:3809:27)
I/flutter (16939): #2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3721:15)
I/flutter (16939): #3      Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #4      ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #5      StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #6      ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #7      Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #8      Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #9      SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #10     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #11     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #12     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #13     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #14     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #15     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #16     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #17     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #18     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #19     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #20     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #21     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #22     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #23     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #24     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #25     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #26     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #27     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #28     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #29     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #30     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #31     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #32     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #33     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #34     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #35     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #36     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #37     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #38     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #39     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #40     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #41     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #42     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #43     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #44     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #45     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #46     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #47     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #48     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #49     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #50     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #51     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #52     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #53     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #54     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #55     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #56     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #57     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #58     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #59     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #60     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #61     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #62     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #63     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #64     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #65     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #66     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #67     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #68     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #69     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #70     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #71     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #72     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #73     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #74     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #75     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #76     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #77     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #78     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #79     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #80     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #81     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #82     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #83     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #84     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #85     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #86     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #87     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #88     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #89     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #90     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #91     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #92     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #93     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #94     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #95     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #96     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #97     MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4965:32)
I/flutter (16939): #98     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #99     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #100    _TheatreElement.mount (package:flutter/src/widgets/overlay.dart:493:16)
I/flutter (16939): #101    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #102    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #103    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #104    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #105    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #106    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #107    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #108    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #109    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #110    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #111    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #112    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #113    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #114    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #115    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #116    SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #117    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #118    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #119    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #120    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #121    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #122    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #123    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #124    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #125    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #126    SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #127    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #128    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #129    SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #130    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #131    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #133    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #134    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #135    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #136    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #137    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #138    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #139    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #140    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #141    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #142    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #143    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #144    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #145    SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #146    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #147    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #148    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #149    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #150    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #151    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #152    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #153    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #155    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #156    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #157    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #158    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #159    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #160    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #161    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #162    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #163    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #164    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #165    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #166    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #167    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #168    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #169    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #170    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #171    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #172    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #173    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #174    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #175    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #176    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #177    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #178    SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
I/flutter (16939): #179    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #180    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #181    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #182    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #183    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #184    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #185    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #186    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #187    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #188    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #189    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #190    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #191    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #192    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #193    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #194    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #195    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #196    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #197    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #198    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #199    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #200    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #201    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #202    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #203    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #204    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #205    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #206    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #207    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #208    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #209    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #210    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #211    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #212    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #214    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #215    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #216    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #217    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #218    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #219    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #220    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #221    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #222    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #223    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #224    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #225    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #226    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #227    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #228    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #229    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #230    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #231    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #232    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #233    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #234    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #235    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
I/flutter (16939): #236    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #237    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #238    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #239    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
I/flutter (16939): #240    Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
I/flutter (16939): #241    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
I/flutter (16939): #242    ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
I/flutter (16939): #243    Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
I/flutter (16939): #244    Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
I/flutter (16939): #245    RenderObjectToWidgetElement._rebuild (package:flutter/src/widgets/binding.dart:909:16)
I/flutter (16939): #246    RenderObjectToWidgetElement.mount (package:flutter/src/widgets/binding.dart:880:5)
I/flutter (16939): #247    RenderObjectToWidgetAdapter.attachToRenderTree.<anonymous closure> (package:flutter/src/widgets/binding.dart:826:17)
I/flutter (16939): #248    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2266:19)
I/flutter (16939): #249    RenderObjectToWidgetAdapter.attachToRenderTree (package:flutter/src/widgets/binding.dart:825:13)
I/flutter (16939): #250    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding.attachRootWidget (package:flutter/src/widgets/binding.dart:712:7)
I/flutter (16939): #251    runApp (package:flutter/src/widgets/binding.dart:756:7)
I/flutter (16939): #252    main (package:fluttercontacts/main.dart:4:16)
I/flutter (16939): #253    _startIsolate.<anonymous closure> (dart:isolate/runtime/libisolate_patch.dart:289:19)
I/flutter (16939): #254    _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)
I/flutter (16939): ════════════════════════════════════════════════════════════════════════════════════════════════════
W/CursorWrapperInner(16939): Cursor finalized without prior close()
E/flutter (16939): [ERROR:flutter/shell/common/shell.cc(184)] Dart Error: Unhandled exception:
E/flutter (16939): NoSuchMethodError: The getter 'emails' was called on null.
E/flutter (16939): Receiver: null
E/flutter (16939): Tried calling: emails
E/flutter (16939): #0      Object.noSuchMethod (dart:core/runtime/libobject_patch.dart:50:5)
E/flutter (16939): #1      Contact._toMap (package:contacts_service/contacts_service.dart:76:32)
E/flutter (16939): #2      ContactsService.addContact (package:contacts_service/contacts_service.dart:22:51)
E/flutter (16939): #3      _MyHomePageState._selectcontact (package:fluttercontacts/main.dart:58:27)
E/flutter (16939): <asynchronous suspension>
E/flutter (16939): #4      _MyHomePageState.build (package:fluttercontacts/main.dart:42:20)
E/flutter (16939): #5      StatefulElement.build (package:flutter/src/widgets/framework.dart:3809:27)
E/flutter (16939): #6      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3721:15)
E/flutter (16939): #7      Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
E/flutter (16939): #8      ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
E/flutter (16939): #9      StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
E/flutter (16939): #10     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
E/flutter (16939): #11     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (16939): #12     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (16939): #13     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
E/flutter (16939): #14     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (16939): #15     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (16939): #16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
E/flutter (16939): #17     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
E/flutter (16939): #18     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
E/flutter (16939): #19     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
E/flutter (16939): #20     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (16939): #21     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (16939): #22     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
E/flutter (16939): #23     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (16939): #24     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (16939): #25     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
E/flutter (16939): #26     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (16939): #27     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (16939): #28     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
E/flutter (16939): #29     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (16939): #30     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (16939): #31     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
E/flutter (16939): #32     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (16939): #33     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (16939): #34     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
E/flutter (16939): #35     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
E/flutter (16939): #36     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
E/flutter (16939): #37     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
E/flutter (16939): #38     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
E/flutter (16939): #39     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (16939): #40     Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (16939): #41     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
E/flutter (16939): #42     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
E/flutter (16939): #43     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
E/flutter (16939): #44     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
E/flutter (16939): #45     Element.inflateWidget (package:flutt
@zoechi
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zoechi commented Jan 14, 2019

This looks like an issue in your code

I/flutter (16939): type 'Future<dynamic>' is not a subtype of type '() => void'
I/flutter (16939): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter (16939): more information in this error message to help you determine and fix the underlying cause.
I/flutter (16939): In either case, please report this assertion by filing a bug on GitHub:
I/flutter (16939):   https://github.com/flutter/flutter/issues/new?template=BUG.md
I/flutter (16939): When the exception was thrown, this was the stack:
I/flutter (16939): #0      _MyHomePageState.build (package:fluttercontacts/main.dart:42:20)

Sorry,

In either case, please report this assertion by filing a bug on GitHub:

is misleading in this case.

@zoechi zoechi closed this as completed Jan 14, 2019
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This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

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@zoechi @Yogita75