Found the "WTF" log for Runtime exception

Fatal Exception: java.lang.RuntimeException
Wait... but why? WTF!? Really shouldn't happen any more after fixing https://github.com/danikula/AndroidVideoCache/issues/43. If you read it on your device log, please, notify me danikula@gmail.com or create issue here https://github.com/danikula/AndroidVideoCache/issues.

com.android.okio.OkBuffer.write (OkBuffer.java:574)
--
  | com.android.okio.OkBuffer.read (OkBuffer.java:610)
  | com.android.okio.RealBufferedSource.read (RealBufferedSource.java:53)
  | com.android.okhttp.internal.http.HttpConnection$FixedLengthSource.read (HttpConnection.java:442)
  | com.android.okhttp.internal.Util.skipAll (Util.java:227)
  | com.android.okhttp.internal.http.HttpConnection.discard (HttpConnection.java:212)
  | com.android.okhttp.internal.http.HttpConnection$FixedLengthSource.close (HttpConnection.java:464)
  | com.android.okhttp.internal.Util.closeQuietly (Util.java:97)
  | com.android.okhttp.internal.http.HttpEngine.close (HttpEngine.java:433)
  | com.android.okhttp.internal.http.HttpURLConnectionImpl.disconnect (HttpURLConnectionImpl.java:113)
  | com.android.okhttp.internal.http.DelegatingHttpsURLConnection.disconnect (DelegatingHttpsURLConnection.java:93)
  | com.android.okhttp.internal.http.HttpsURLConnectionImpl.disconnect (HttpsURLConnectionImpl.java:25)
  | com.google.firebase.perf.network.zze.disconnect (Unknown Source)
  | com.google.firebase.perf.network.zzd.disconnect (Unknown Source)
  | com.danikula.videocache.HttpUrlSource.close (SourceFile:94)
  | com.danikula.videocache.ProxyCache.closeSource (SourceFile:168)
  | com.danikula.videocache.ProxyCache.readSource (SourceFile:143)
  | com.danikula.videocache.ProxyCache.access$100 (SourceFile:19)
  | com.danikula.videocache.ProxyCache$SourceReaderRunnable.run (SourceFile:187)
  | java.lang.Thread.run (Thread.java:818)

Start by examining the stack trace through com.danikula.videocache.HttpUrlSource.close, ProxyCache.closeSource, ProxyCache.readSource, and SourceReaderRunnable.run. Reproduce the RuntimeException if possible and compare it with the linked issue 43. Done means identifying the trigger and documenting or fixing the failure, but this report does not define a specific expected change.

索引モデルが issue の本文から書いたものです。