Q about post-extract recent commit breakage

[Michael Dickens]

Re: < https://github.com/macports/macports-base/commit/7921b2e05e9a4c9cda6efedee496affb305dcc07 >:
{{{
Date:   December 29, 2017 at 10:54:09 AM EST
Author: Andrew L. Moore slewsys at gmail.com
Committed by Mojca Miklavec mojca at macports.org

portextract: Create symlink if no $worksrcpath

If expected extract path doesn't exist, create a symlink
from expected directory to the actual one.
If $worksrcdir is explicitly set, nothing is done.
}}}

This commit breaks the extract for "cmake-devel". Is the issue with the Portfile, or with the commit? I'll look into this issue when I have a chance, but maybe someone else (Mojca?) will get there first! - MLD