What I expected to happen was that every dirt type block can be make into a path block (dirt, coarse dirt, mycelium, podzol, grass and (I don't know if this is a bug or not) farmland).
What actually happened was it only worked with grass blocks.

Steps to Reproduce:
1. Take every dirt type block (Mentioned at the top).
2. Take any type of shovel.
3. Right-click in each and every dirt type block.