tried to access class kotlin.jvm.internal.DefaultConstructorMarker from class androidx.room.CoroutinesRoom$Companion

Question

I'm getting java.lang.BootstrapMethodError: java.lang.IllegalAccessError: tried to access class kotlin.jvm.internal.DefaultConstructorMarker from class androidx.room.CoroutinesRoom$Companion with the following test, why?

@RunWith(AndroidJUnit4::class)
class DBTest {

  @Test
  @Throws(Exception::class)
  fun basicOperations() = runBlocking  {
    val context = ApplicationProvider.getApplicationContext<Context>()
    val db = Room.inMemoryDatabaseBuilder(context, AppDatabase::class.java).build()
    db.favDao().insertFav(Fav("whatever"))
    assertEquals("whatever", db.favDao().getFav("whatever"))
    db.favDao().deleteFav(Fav("whatever"))
    assertEquals(null, db.favDao().getFav("whatever"))
    db.close()
  }
}

I pretty much just copied from the docs.

I'm using the latest room-coroutines as there was recent media coverage about it from Google.

Answer 1

As of 3/21/19 a fix was introduced in the snapshot of Robolectric, it should be included in future releases:

https://github.com/robolectric/robolectric/commit/6d246391fdaac92968811bc83e1afb057e6f93a3

The cause was due to an internal annotation on the companion object of CoroutinesRoom class.