Attempt to write a readonly database... but I'm not

I have a read-only database connection. I open it like this:

return SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.OPEN_READONLY);

I read data from the database in a Loader (Commonsware's SQLiteCursorLoader, to be precise).

Very rarely, I get a crash like this. The Loader is calling SQLiteCursor.getCount() which ends in a call to native code, and this causes the exception:

java.lang.RuntimeException: An error occured while executing doInBackground()
       at android.support.v4.content.ModernAsyncTask$3.done(ModernAsyncTask.java:137)
       at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
       at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
       at java.util.concurrent.FutureTask.run(FutureTask.java:242)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)
Caused by: android.database.sqlite.SQLiteReadOnlyDatabaseException: attempt to write a readonly database (code 776)
       at android.database.sqlite.SQLiteConnection.nativeExecuteForCursorWindow(SQLiteConnection.java)
       at android.database.sqlite.SQLiteConnection.executeForCursorWindow(SQLiteConnection.java:845)
       at android.database.sqlite.SQLiteSession.executeForCursorWindow(SQLiteSession.java:836)
       at android.database.sqlite.SQLiteQuery.fillWindow(SQLiteQuery.java:62)
       at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:144)
       at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:133)
       at com.commonsware.cwac.loaderex.acl.AbstractCursorLoader.loadInBackground(AbstractCursorLoader.java:42)
       at com.commonsware.cwac.loaderex.acl.AbstractCursorLoader.loadInBackground(AbstractCursorLoader.java:1)
       at android.support.v4.content.AsyncTaskLoader.onLoadInBackground(AsyncTaskLoader.java:242)
       at android.support.v4.content.AsyncTaskLoader$LoadTask.doInBackground(AsyncTaskLoader.java:51)
       at android.support.v4.content.AsyncTaskLoader$LoadTask.doInBackground(AsyncTaskLoader.java:40)
       at android.support.v4.content.ModernAsyncTask$2.call(ModernAsyncTask.java:123)
       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)

This looks like a bug in Android's SQLite wrapper to me. Am I doing anything wrong?

As a workaround, I could try using a writable database connection instead, but I'd like to know why the crash is happening.