[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):

 Here's what I have:

 {{{
 $ port version
 Version: 2.5.4
 $ port installed cctools
 The following ports are currently installed:
   cctools @921_1+xcode (active)
 }}}

 The message ''Failed to determine active llvm variant for cctools. Please
 check variant list'' comes from the Portfile itself:

 {{{
 ui_error "Failed to determine active llvm variant for cctools. Please
 check variant list."
 }}}

 I presume MacPorts base issues ''Failed to parse file .../Portfile:
 configuration error'' when `ui_error` is invoked.

-- 
Ticket URL: <https://trac.macports.org/ticket/58462#comment:3>
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