Issue 1:
when i tried to use this. FirebaseAuth.instance.signInWithEmailAndPassword(email:credEmail,password:credPassword);

the result is :

/AndroidRuntime(13937): java.lang.NullPointerException: null value in entry: uid=null E/AndroidRuntime(13937):	at com.google.common.collect.CollectPreconditions.checkEntryNotNull(CollectPreconditions.java:34) E/AndroidRuntime(13937):	at com.google.common.collect.ImmutableMapEntry.<init>(ImmutableMapEntry.java:49) E/AndroidRuntime(13937):	at com.google.common.collect.ImmutableMap.entryOf(ImmutableMap.java:122) E/AndroidRuntime(13937):	at com.google.common.collect.ImmutableMap$Builder.put(ImmutableMap.java:198) E/AndroidRuntime(13937):	at io.flutter.plugins.firebaseauth.FirebaseAuthPlugin.userInfoToMap(FirebaseAuthPlugin.java:422) E/AndroidRuntime(13937):	at io.flutter.plugins.firebaseauth.FirebaseAuthPlugin.mapFromUser(FirebaseAuthPlugin.java:440) E/AndroidRuntime(13937):	at io.flutter.plugins.firebaseauth.FirebaseAuthPlugin.access$000(FirebaseAuthPlugin.java:25) E/AndroidRuntime(13937):	at io.flutter.plugins.firebaseauth.FirebaseAuthPlugin$SignInCompleteListener.onComplete(FirebaseAuthPlugin.java:375) E/AndroidRuntime(13937):	at com.google.android.gms.tasks.zzj.run(Unknown Source) E/AndroidRuntime(13937):	at android.os.Handler.handleCallback(Handler.java:754) E/AndroidRuntime(13937):	at android.os.Handler.dispatchMessage(Handler.java:95) E/AndroidRuntime(13937):	at android.os.Looper.loop(Looper.java:163) E/AndroidRuntime(13937):	at android.app.ActivityThread.main(ActivityThread.java:6379) E/AndroidRuntime(13937):	at java.lang.reflect.Method.invoke(Native Method) E/AndroidRuntime(13937):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) E/AndroidRuntime(13937):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)

and then my the debug apps is stopped working.

i try it from folder example on github, For google and faceebook signin is working well. except for this.

is it a bugs or i miss something from that ?

Thank you for your attention :)

Issue 2:
Steps to Reproduce

I'm using the 'master' branch.

Ran these commands:

$ flutter create demoApp

$ cd demoApp

$ flutter build apk

Flutter Doctor

Paste the output of running flutter doctor here.

[✓] Flutter (on Linux, channel master)

• Flutter at /usr/local/google/home/quddusc/flutter

• Framework revision 2f642ce (85 minutes ago), engine revision 57edc53

[✓] Android toolchain - develop for Android devices (Android SDK 24.0.0-preview)

• Android SDK at /usr/local/google/home/quddusc/Android/Sdk

• Platform android-N, build-tools 24.0.0-preview

• OpenJDK Runtime Environment (IcedTea 2.6.6) (7u101-2.6.6-0ubuntu0.14.04.1)

[✓] Atom - a lightweight development environment for Flutter

• Atom installed; Flutter plugin version 0.2.2

Logs and Crash Reports

Please attach any relevent logs or crash reports.

Building APK in debug mode (android-arm)...

Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(ClassLoader.java:803)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)

at java.net.URLClassLoader.access$100(URLClassLoader.java:71)

at java.net.URLClassLoader$1.run(URLClassLoader.java:361)

at java.net.URLClassLoader$1.run(URLClassLoader.java:355)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:354)

at java.lang.ClassLoader.loadClass(ClassLoader.java:425)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)

at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

Oops; flutter has exited unexpectedly: "Exit code 1 from: /usr/local/google/home/quddusc/Android/Sdk/build-tools/24.0.0-preview/dx --dex --force-jumbo --output /tmp/flutter_toolsb75eKg/classes.dex /usr/local/google/home/quddusc/flutter/bin/cache/artifacts/engine/android-arm/classes.dex.jar".