Android Crashlytics sending incorrect line number

Question

I'm trying to integrate Crashlytics with my app and it's working, however the line number passed through seems to be incorrect. This is a stack I'm getting for my test exception:

Fatal Exception: java.lang.RuntimeException: This is a test crash
   at com.myapp.testapp.activity.MainActivity.animateReveal(MainActivity.java:42453)
   at com.myapp.testapp.activity.MainActivity.onClick(MainActivity.java:1356)
   at android.view.View.performClick(View.java:5204)
   at android.view.View$PerformClick.run(View.java:21153)
   at android.os.Handler.handleCallback(Handler.java:739)
   at android.os.Handler.dispatchMessage(Handler.java:95)
   at android.os.Looper.loop(Looper.java:148)
   at android.app.ActivityThread.main(ActivityThread.java:5417)
   at java.lang.reflect.Method.invoke(Method.java)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

So my crash is on line number 1453 but for some reason it's showing up as 42453? Interestingly, the next line number in the stack is correct...

Proguard:

# Crashlitics

-keepattributes SourceFile,LineNumberTable
-keep public class * extends java.lang.Exception
-keepattributes *Annotation*

Answer 1

To preserve the information that Firebase Crashlytics SDK requires for producing readable crash reports, add the following lines to your Proguard or Dexguard config file:

-keepattributes SourceFile,LineNumberTable        # Keep file names and line numbers.
-keep public class * extends java.lang.Exception  # Optional: Keep custom exceptions.