Database onMigrate RuntimeException

[mahibi]

From gplay console reported for 21.2.0 RC1

Exception java.lang.RuntimeException:
  at androidx.room.BaseRoomConnectionManager.onMigrate (RoomConnectionManager.kt:212)
  at androidx.room.RoomConnectionManager$SupportOpenHelperCallback.onUpgrade (RoomConnectionManager.android.kt:152)
  at net.zetetic.database.sqlcipher.SupportHelper$1.onUpgrade (SupportHelper.java:27)
  at net.zetetic.database.sqlcipher.SQLiteOpenHelper.getDatabaseLocked (SQLiteOpenHelper.java:403)
  at net.zetetic.database.sqlcipher.SQLiteOpenHelper.getWritableDatabase (SQLiteOpenHelper.java:278)
  at net.zetetic.database.sqlcipher.SupportHelper.getWritableDatabase (SupportHelper.java:60)
  at androidx.room.driver.SupportSQLiteDriver.open (SupportSQLiteDriver.android.kt:26)
  at androidx.room.driver.SupportSQLiteConnectionPool.getSupportConnection (SupportSQLiteConnectionPool.android.kt:35)
  at androidx.room.driver.SupportSQLiteConnectionPool.useConnection (SupportSQLiteConnectionPool.android.kt:42)
  at androidx.room.RoomConnectionManager.useConnection (RoomConnectionManager.android.kt:126)
  at androidx.room.RoomDatabase.useConnection$room_runtime_release (RoomDatabase.android.kt:593)
  at androidx.room.util.DBUtil__DBUtil_androidKt$performSuspending$$inlined$compatCoroutineExecute$DBUtil__DBUtil_androidKt$1.invokeSuspend (DBUtil.android.kt:113)
  at androidx.room.util.DBUtil__DBUtil_androidKt$performSuspending$$inlined$compatCoroutineExecute$DBUtil__DBUtil_androidKt$1.invoke (Unknown Source:8)
  at androidx.room.util.DBUtil__DBUtil_androidKt$performSuspending$$inlined$compatCoroutineExecute$DBUtil__DBUtil_androidKt$1.invoke (Unknown Source:4)
  at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn (Undispatched.kt:61)
  at kotlinx.coroutines.BuildersKt__Builders_commonKt.withContext (Builders.common.kt:163)
  at kotlinx.coroutines.BuildersKt.withContext (Unknown Source:1)
  at androidx.room.util.DBUtil__DBUtil_androidKt.performSuspending (DBUtil.android.kt:251)
  at androidx.room.util.DBUtil.performSuspending (Unknown Source:1)
  at androidx.room.RxRoom$Companion$createMaybe$1.invokeSuspend (RxRoom.kt:83)
  at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith (ContinuationImpl.kt:33)
  at kotlinx.coroutines.DispatchedTask.run (DispatchedTask.kt:104)
  at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1145)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:644)
  at java.lang.Thread.run (Thread.java:1012)

There seems to be something wrong with DB Migrations. According to https://github.com/nextcloud/talk-android/milestone/96?closed=1 the only PRs that touch the migrations are

• https://github.com/nextcloud/talk-android/pull/4971/
• https://github.com/nextcloud/talk-android/pull/4973/

The database was also touched in

• https://github.com/nextcloud/talk-android/pull/5155

Please note:

• This exception will postpone the 21.2.0 release to production at least by 2 weeks as i won't release this before my vacation (4.8.-16.8.).
• This has NOTHING to do with https://github.com/nextcloud/talk-android/pull/5175 which is not included in the stable-21.2 branch.