[GHC] #10543: MacOS: validate fails on \u

[GHC]

#10543: MacOS: validate fails on \u
-------------------------------------+-------------------------------------
        Reporter:  trommler          |                   Owner:
            Type:  bug               |                  Status:  patch
        Priority:  normal            |               Milestone:
       Component:  Build System      |                 Version:  7.10.1
      Resolution:                    |                Keywords:  cpp
Operating System:  MacOS X           |            Architecture:
 Type of failure:  Building GHC      |  Unknown/Multiple
  failed                             |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:  Phab:D1004
-------------------------------------+-------------------------------------
Changes (by thomie):

 * keywords:   => cpp
 * status:  new => patch
 * differential:   => Phab:D1004


Comment:

 Reproducible with:

 {{{
 $ cat T10543.hs
 matchBuildTarget pkg = \utarget fexists -> undefined

 $ ghc -pgmP clang T10543.hs -fforce-recomp -cpp -Werror
 ...same error...
 }}}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10543#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler