Why is the merge tool disabled in Eclipse for a EGit-managed project?

Question

As per the EGit User Guide, to use the merge tool, one should right-click on the resource with a merge conflict and then select Team > Merge Tool

Answer 1

It seems to be a bug in EGit as VonC mentioned, but the fix is easy. I did it using reset branch option on the same menu that Cherry Pick option existed.

Note: git stash clear didn't help.