Steps to reproduce

(get-help about_*) | select name

or trying to create a powershell object

$l = get-help about_*) | select name

Expected behavior

list of all existing "about_*" topics

Actual behavior

Won't create results and won't clear the screen after the search.

Environment data

Ubuntu 16.04 - powershell_6.0.0-alpha.8-1_amd64-ubuntu.16.04-x64

> $PSVersionTable