find-tag doesn't work in emacs 25

Question

The way to find definitions was changed in Emacs 25.

A new package called xref has replaced the old etags commands. This package doesn't seem to work for me.

For example: The command M-x find-tag was replaced by M-x xref-find-definitions but when I use it it says:

No definitions found for: ...

The same TAGS file works with older Emacs. Anyone can help with this?

Answer 1

I used a newer etags version to rebuild the TAGS file and the problem was fixed.

I assume emacs 25.2 is not compatible with older etags versions.