If you have 4 dark oak saplings with two blocks near directed to north or west the tree won't grow.

What I expected to happen was...:
The tree must grow as expected when those blocks are directed to south or east.

What actually happened was...:
The tree didn't grow.

Steps to Reproduce:
1. Put four dark oak saplings in a world
2. Place a two x two wall nearer the saplings looking south or west.
3. Bonemeal it