[GHC] #10157: HSCOLOUR_SRCS=YES fails mysteriously when no HsColour executable available

[GHC]

#10157: HSCOLOUR_SRCS=YES fails mysteriously when no HsColour executable available
-------------------------------------+-------------------------------------
        Reporter:  ezyang            |                   Owner:
            Type:  bug               |                  Status:  patch
        Priority:  low               |               Milestone:  7.12.1
       Component:  Build System      |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:  Phab:D1232
-------------------------------------+-------------------------------------
Changes (by thomie):

 * status:  new => patch
 * differential:   => Phab:D1232
 * milestone:   => 7.12.1


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10157#comment:1>
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