[MacPorts] #58462: gcc9 @9.1.0, gcc10 @10-20190505: Portfile parse failures

[MacPorts]

#58462: gcc9 @9.1.0, gcc10 @10-20190505: Portfile parse failures
-------------------------+--------------------
  Reporter:  mndavidoff  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  gcc9 gcc10  |
-------------------------+--------------------

Comment (by mndavidoff):

 I've uninstalled/reinstalled cctools using the default cctools variant,
 did a selfupdate, and the gcc9/gcc10 ports are now back. That solved the
 immediate problem. I was only using the cctools +xcode variant because it
 was the default at the time I installed cctools. I'm ok with using the new
 cctools default variant.

 I'm intentionally building from source. I'm well aware of how long it
 takes. ;-)

 At the risk of being pedantic, I do think there's a bug in the gcc9/gcc10
 portfiles: they should not fail to parse if the wrong variant of some
 other port is installed.

-- 
Ticket URL: <https://trac.macports.org/ticket/58462#comment:9>
MacPorts <https://www.macports.org/>
Ports system for macOS