[GHC] #12625: Bad error message for flags with required but missing arguments

[GHC]

#12625: Bad error message for flags with required but missing arguments
-------------------------------------+-------------------------------------
        Reporter:  dramforever       |                Owner:  RolandSenn
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:  T12625
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab: D5030
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"ff06176b87078ce56cc7b6b3405a029ef3d0046f/ghc"
 ff06176b/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="ff06176b87078ce56cc7b6b3405a029ef3d0046f"
 Improve error message for flags with missing required arguments (#12625)

 Test Plan: make TEST=T12625

 Reviewers: jstolarek, austin, bgamari

 Reviewed By: bgamari

 Subscribers: rwbarton, thomie, carter

 GHC Trac Issues: #12625

 Differential Revision: https://phabricator.haskell.org/D5030
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12625#comment:3>
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