[BaseTransientBottomBar] 1.1.0-rc01 causes View.invalidate(boolean) NullPointerException

Description: After updating from Material 1.0.0 to 1.1.0-rc01 I saw multiple reports of crashes with BaseTransientBottomBar (and no app specific code in stacktrace). Stacktraces look like: Huawei Android 7

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.invalidate(boolean)' on a null object reference
       at android.view.View.setFlags + 11550(View.java:11550)
       at android.view.View.setVisibility + 8046(View.java:8046)
       at com.google.android.material.snackbar.BaseTransientBottomBar$9.run + 849(BaseTransientBottomBar.java:849)
       at android.os.Handler.handleCallback + 761(Handler.java:761)
       at android.os.Handler.dispatchMessage + 98(Handler.java:98)
       at android.os.Looper.loop + 156(Looper.java:156)
       at android.app.ActivityThread.main + 6617(ActivityThread.java:6617)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run + 942(ZygoteInit.java:942)
       at com.android.internal.os.ZygoteInit.main + 832(ZygoteInit.java:832)

Samsung Android 9

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.invalidate(boolean)' on a null object reference
       at android.view.View.setFlags + 15721(View.java:15721)
       at android.view.View.setVisibility + 10789(View.java:10789)
       at com.google.android.material.snackbar.BaseTransientBottomBar$9.run + 849(BaseTransientBottomBar.java:849)
       at android.os.Handler.handleCallback + 873(Handler.java:873)
       at android.os.Handler.dispatchMessage + 99(Handler.java:99)
       at android.os.Looper.loop + 214(Looper.java:214)
       at android.app.ActivityThread.main + 7094(ActivityThread.java:7094)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run + 494(RuntimeInit.java:494)
       at com.android.internal.os.ZygoteInit.main + 975(ZygoteInit.java:975)

Xiaomi Android 9

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.invalidate(boolean)' on a null object reference
       at android.view.View.setFlags + 14186(View.java:14186)
       at android.view.View.setVisibility + 10007(View.java:10007)
       at com.google.android.material.snackbar.BaseTransientBottomBar$9.run + 849(BaseTransientBottomBar.java:849)
       at android.os.Handler.handleCallback + 873(Handler.java:873)
       at android.os.Handler.dispatchMessage + 99(Handler.java:99)
       at android.os.Looper.loop + 201(Looper.java:201)
       at android.app.ActivityThread.main + 6823(ActivityThread.java:6823)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run + 547(RuntimeInit.java:547)
       at com.android.internal.os.ZygoteInit.main + 873(ZygoteInit.java:873)

LGE Android 9

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.invalidate(boolean)' on a null object reference
       at android.view.View.setFlags + 14222(View.java:14222)
       at android.view.View.setVisibility + 10027(View.java:10027)
       at com.google.android.material.snackbar.BaseTransientBottomBar$9.run + 849(BaseTransientBottomBar.java:849)
       at android.os.Handler.handleCallback + 873(Handler.java:873)
       at android.os.Handler.dispatchMessage + 99(Handler.java:99)
       at android.os.Looper.loop + 193(Looper.java:193)
       at android.app.ActivityThread.main + 6854(ActivityThread.java:6854)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run + 493(RuntimeInit.java:493)
       at com.android.internal.os.ZygoteInit.main + 860(ZygoteInit.java:860)

(if needed I can find few more stacktrace, but they seem to differ just by line numbers)

Expected behavior: BaseTransientBottomBar should not cause crashes/NPE

Steps to reproduce are unfortunately unknown, it seems to be relatively rare. The issue did not happen in 1.0.0

Material Library version: 1.1.0-rc01

Device: Multiple Devices/Android OS versions affected.

[BYogatama]

Having same issue on Android 5, with com.google.android.material:material:1.4.0

 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.invalidate(boolean)' on a null object reference
        at android.view.View.setFlags(View.java:9682)
        at android.view.View.setVisibility(View.java:6663)
        at android.widget.FrameLayout.setVisibility(FrameLayout.java:208)
        at com.google.android.material.snackbar.BaseTransientBottomBar$10.run(BaseTransientBottomBar.java:896)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5221)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

[vonox7]

Fyi: Some issues are still present, see https://github.com/material-components/material-components-android/pull/1938. E.g.

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.invalidate(boolean)' on a null object reference
       at android.view.View.setFlags(View.java:15710)
       at android.view.View.setVisibility(View.java:10777)
       at com.google.android.material.snackbar.BaseTransientBottomBar$10.run(BaseTransientBottomBar.java:896)
       at android.os.Handler.handleCallback(Handler.java:873)
       at android.os.Handler.dispatchMessage(Handler.java:99)
       at android.os.Looper.loop(Looper.java:214)
       at android.app.ActivityThread.main(ActivityThread.java:6981)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)

As a possible workaround you might use implementation 'com.github.material-components:material-components-android:d9fa78f176' as jitpack-dependency, in that version the NPEs are resolved.

@wcshi since the issue is only partially resolved, you might open this issue again.