creativecreatorormaybenot

E/CloudFirestorePlugin(21506): java.lang.Exception: Do transaction failed.
E/CloudFirestorePlugin(21506): java.util.concurrent.ExecutionException: java.lang.Exception: Do transaction failed.
E/CloudFirestorePlugin(21506): 	at com.google.android.gms.tasks.Tasks.zzb(Unknown Source:61)
E/CloudFirestorePlugin(21506): 	at com.google.android.gms.tasks.Tasks.await(Unknown Source:33)
E/CloudFirestorePlugin(21506): 	at io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin$4.apply(CloudFirestorePlugin.java:409)
E/CloudFirestorePlugin(21506): 	at io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin$4.apply(CloudFirestorePlugin.java:361)
E/CloudFirestorePlugin(21506): 	at com.google.firebase.firestore.FirebaseFirestore.lambda$runTransaction$1(com.google.firebase:firebase-firestore@@19.0.0:283)
E/CloudFirestorePlugin(21506): 	at com.google.firebase.firestore.FirebaseFirestore$$Lambda$3.call(Unknown Source:6)
E/CloudFirestorePlugin(21506): 	at com.google.android.gms.tasks.zzv.run(Unknown Source:2)
E/Cl

creativecreatorormaybenot

import 'package:flutter/material.dart';

main() {
  runApp(MaterialApp(home: const Page()));
}

class Page extends StatelessWidget {
  const Page({Key key}) : super(key: key);

  @override

creativecreatorormaybenot

main() {
  var  data = ["abcd", 34, "ef", false];
  int n = data[1];
  print(n*2); // -> 68
  
  var otherData = [34, "abcd", "ef", false];  // -> type error
  int m = otherData[1];
  print(m*2);  
}

creativecreatorormaybenot

D/AndroidRuntime(10123): Shutting down VM
E/AndroidRuntime(10123): FATAL EXCEPTION: main
E/AndroidRuntime(10123): Process: app, PID: 10123
E/AndroidRuntime(10123): java.lang.RuntimeException: Internal error in Firestore (19.0.0).
E/AndroidRuntime(10123): 	at com.google.firebase.firestore.util.AsyncQueue.lambda$panic$5(com.google.firebase:firebase-firestore@@19.0.0:379)
E/AndroidRuntime(10123): 	at com.google.firebase.firestore.util.AsyncQueue$$Lambda$5.run(Unknown Source:2)
E/AndroidRuntime(10123): 	at android.os.Handler.handleCallback(Handler.java:873)
E/AndroidRuntime(10123): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(10123): 	at android.os.Looper.loop(Looper.java:193)
E/AndroidRuntime(10123): 	at android.app.ActivityThread.main(ActivityThread.java:6669)

creativecreatorormaybenot

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(routes: {
    '/': (context) => Scaffold(
            body: Center(
          child: FlatButton(
            child: const Text('open'),
            onPressed: () => Navigator.of(context).pushNamed('/page'),
          ),

creativecreatorormaybenot

import 'package:flutter/material.dart';

main() {
  runApp(
    MaterialApp(
      home: Scaffold(
        body: Center(
          child: Container(
            color: Colors.greenAccent,
            child: ListTile(

creativecreatorormaybenot

import 'package:flutter/material.dart';

main() {
  runApp(
    MaterialApp(
      home: Scaffold(
        body: RefreshIndicator(
          onRefresh: () async => Future.delayed(Duration(seconds: 1)),
          child: ListView.builder(
            itemBuilder: (context, index) => ListTile(

creativecreatorormaybenot

class Foo {
  output() {
    print('q');
  }
}

mixin Bar {
  output() {
    print('w');
  }

creativecreatorormaybenot

java.lang.RuntimeException: 
  at com.google.firebase.firestore.util.AsyncQueue.access$000 (AsyncQueue.java)
  or                     .access$100 (AsyncQueue.java)
  or                     .callTask (AsyncQueue.java)
  or                     .containsDelayedTask (AsyncQueue.java)
  or                     .enqueue (AsyncQueue.java)
  or                     .enqueueAfterDelay (AsyncQueue.java)
  or                     .getExecutor (AsyncQueue.java)
  or                     .lambda$callTask$0 (AsyncQueue.java)
  or                     .lambda$callTask$1 (AsyncQueue.java)

creativecreatorormaybenot

java.lang.RuntimeException: 
  at android.os.AsyncTask$3.done (AsyncTask.java:365)
  at java.util.concurrent.FutureTask.finishCompletion (FutureTask.java:383)
  at java.util.concurrent.FutureTask.setException (FutureTask.java:252)
  at java.util.concurrent.FutureTask.run (FutureTask.java:271)
  at android.os.AsyncTask$SerialExecutor$1.run (AsyncTask.java:257)
  at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1162)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:636)
  at java.lang.Thread.run (Thread.java:784)
Caused by: java.lang.NullPointerException: