Flutter - FirebaseAuthで発生する。エラーをtry catchで拾えない。

前提・実現したいこと

FirebaseAuthのsignInWithCredential及びcreateUserWithEmailAndPasswordを使ってEmailでアカウント登録、ログインをさせたいのですが、入力形式が間違っていた場合、email_sign_in_form.dart内でtry catchでエラーを拾ってログに出力したい。

発生している問題・エラーメッセージ

デバックコンソールにエラーを表示させたいが、入力形式が違う場合アプリが落ちてしまう。

PlatformException (PlatformException(invalid-email, The email address is badly formatted., {code: invalid-email, message: The email address is badly formatted., nativeErrorMessage: The email address is badly formatted., nativeErrorCode: 17008, additionalData: {}}, null))

###Packageのバージョン

version: 1.0.0+1

environment:
  sdk: ">=2.10.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^1.0.0
  firebase_auth: ^0.20.1
  firebase_core: ^0.7.0

Auth.dart

import 'package:firebase_auth/firebase_auth.dart';

abstract class AuthBase {
  User get currentUser;
  Future<User> signInAnonymous();
  Future<void> signOut();
  Stream<User> authStateChanges();
  Future<User> signInWithEmailAndPassword(String email, String password);
  Future<User> createUserWithEmailAndPassword(String email, String password);
}

class Auth implements AuthBase {
  final _auth = FirebaseAuth.instance;
  Stream<User> authStateChanges() => _auth.authStateChanges();
  @override
  User get currentUser => _auth.currentUser;

  @override
  Future<User> signInAnonymous() async {
    final userCredentials = await _auth.signInAnonymously();
    return userCredentials.user;
  }

  @override
  Future<User> signInWithEmailAndPassword(String email, String password) async {
    final userCredential = await _auth.signInWithCredential(
      EmailAuthProvider.credential(email: email, password: password),
    );
    return userCredential.user;
  }

  @override
  Future<User> createUserWithEmailAndPassword(
      String email, String password) async {
    final userCredential = await _auth.createUserWithEmailAndPassword(
        email: email, password: password);
    return userCredential.user;
  }

  @override
  Future<void> signOut() async {
    await _auth.signOut();
  }
}

###email_sign_in_form.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_firebase/conponets_widgets/form_submit_button.dart';
import 'package:flutter_firebase/service/auth.dart';
import 'package:flutter_firebase/sign_page/validators.dart';

enum EmamilSignInFormType {
  signIn,
  register,
}

class EmailSignInForm extends StatefulWidget with EmailAndPasswordValidators {
  EmailSignInForm({Key key, @required this.auth}) : super(key: key);
  final AuthBase auth;
  @override
  _EmailSignInFormState createState() => _EmailSignInFormState();
}

class _EmailSignInFormState extends State<EmailSignInForm> {
  // - Properties

  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();

  final _emailFocusNode = FocusNode();
  final _passwordFocusNode = FocusNode();
  EmamilSignInFormType _formType = EmamilSignInFormType.signIn;
  String get _email => _emailController.text;
  String get _password => _passwordController.text;
  bool _submitted = false;

  // -  Functions

  void _toggleFormType() {
    setState(() {
      _submitted = false;
      _formType = _formType == EmamilSignInFormType.signIn
          ? EmamilSignInFormType.register
          : EmamilSignInFormType.signIn;
    });
    _emailController.clear();
    _passwordController.clear();
  }

  *************************************************
  ***ここで⇩例外が発生した場合コンソールにエラーを表示したい。**
  *************************************************

  void _submit() async {
    setState(() {
      _submitted = true;
    });
    try {
      if (_formType == EmamilSignInFormType.signIn) {
        await widget.auth.signInWithEmailAndPassword(_email, _password);
      } else {
        await widget.auth.createUserWithEmailAndPassword(_email, _password);
      }
      Navigator.pop(context);
    } on PlatformException catch (e) {
      print(e.toString());
    } catch (e) {
      print(e.toString());
    }
  }

  void _emailEditingCompleted() {
    FocusScope.of(context).requestFocus(_passwordFocusNode);
  }

  void _updateState() {
    setState(() {
      print(_email);
      print(_password);
    });
  }

  List<Widget> _buildChildren() {
    final primaryText = _formType == EmamilSignInFormType.signIn
        ? 'Sign in'
        : 'Create an account';
    final secondaryText = _formType == EmamilSignInFormType.signIn
        ? 'Need an account? Register'
        : 'Have an account? Sign in';
    bool submitEnabled = widget.emailValidator.isValid(_email) &&
        widget.passwordValidator.isValid(_password);
    return [
      _buildEmailTextField(),
      SizedBox(
        height: 8.0,
      ),
      _buildPasswordTextField(),
      SizedBox(
        height: 32.0,
      ),
      FormSubmitButton(
        text: primaryText,
        onPressed: submitEnabled ? _submit : null,
      ),
      TextButton(
        onPressed: _toggleFormType,
        child: Text(secondaryText),
      ),
    ];
  }

  TextField _buildPasswordTextField() {
    final showErrorText =
        _submitted && widget.passwordValidator.isValid(_password);
    return TextField(
      focusNode: _passwordFocusNode,
      keyboardType: TextInputType.visiblePassword,
      controller: _passwordController,
      obscureText: true,
      decoration: InputDecoration(
        labelText: 'Password',
        errorText: showErrorText ? widget.invalidPasswordErrorText : null,
      ),
      textInputAction: TextInputAction.done,
      onEditingComplete: _submit,
      onChanged: (password) => _updateState(),
    );
  }

  TextField _buildEmailTextField() {
    bool showErrorText = _submitted && widget.emailValidator.isValid(_email);
    return TextField(
      focusNode: _emailFocusNode,
      keyboardType: TextInputType.emailAddress,
      controller: _emailController,
      autocorrect: false,
      decoration: InputDecoration(
        labelText: 'Email',
        hintText: 'sample@email.com',
        errorText: showErrorText ? widget.invalidEmailErrorText : null,
      ),
      textInputAction: TextInputAction.next,
      onEditingComplete: _emailEditingCompleted,
      onChanged: (email) => _updateState(),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        mainAxisSize: MainAxisSize.min,
        children: _buildChildren(),
      ),
    );
  }
}

###email_sign_in_page.dart

import 'package:flutter/material.dart';
import 'package:flutter_firebase/service/auth.dart';
import 'package:flutter_firebase/sign_page/email_sign_in_form.dart';

class EmailSignInPage extends StatelessWidget {
  EmailSignInPage({this.auth});
  final AuthBase auth;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Sign in'),
      ),
      body: SafeArea(
        child: SingleChildScrollView(
          child: Container(
            padding: const EdgeInsets.all(16.0),
            child: Card(
              elevation: 5.0,
              child: EmailSignInForm(
                auth: auth,
              ),
            ),
          ),
        ),
      ),
      backgroundColor: Colors.grey[200],
    );
  }
}

補足情報（FW/ツールのバージョンなど）

###追記
FirebaseのログインプロバイダーEmail/passwordは有効です。
StackOverFlowに似た質問がありますが、これはPackageのバグなのでしょうか？
[firebase_auth] Unhandled Exception: PlatformException(ERROR_INVALID_VERIFICATION_CODE)