After accidentally right-clicking a compressor in my survival world, I found this bug:

ExtendedCrafting-1.4.3
Forge-2751

Steps to reproduce:
Put a catalyst and items into correct slots,
Right click the compressor with the crescent hammer,
Lose the catalyst and ALL stored items.

Clicking eject after right-clicking with the wrench does not output any items.

See below:

I'm going to just disable this interaction in the next update. Maybe later I can implement it correctly.