Guards are shown as undefined after upgrade to OTP 27

[duncanatt]

Guards are shown as undefined after upgrading to OTP 27. This applies regardless of whether they are used in function heads or inside function bodies.

Has anyone else experienced this issue or found a suitable workaround?

[silviucpp]

I have the same problem. All builtin functions from erlang module shows undefined: node(), is_binary(), term_to_binary and many other.