// verify that index direction is considered when deduping based on an earlier // index t = db.jstests_ore; t.drop(); t.ensureIndex( {a:-1} ) t.ensureIndex( {b:1} ); t.save( {a:1,b:1} ); t.save( {a:2,b:1} ); assert.eq( 2, t.count( {$or:[{a:{$in:[1,2]}},{b:1}]} ) );