Update:
The issue seems to happen when attemping to compile filebeat 6.3 with go 1.10.
I have downloaded Filebeat 6.2 and now the only error I got is the one cited at https://discuss.elastic.co/t/attempting-to-compile-filebeat-in-aix/143378/3 where @pierhugues says that its a dependency defined by their test helpers.
Anyone know how to solve this one? In the post he says nothing about.
Thank you in advance