[GHC] #16201: ghci063 failing on Darwin

[GHC]

#16201: ghci063 failing on Darwin
----------------------------------------+---------------------------------
           Reporter:  bgamari           |             Owner:  (none)
               Type:  bug               |            Status:  new
           Priority:  highest           |         Milestone:  8.8.1
          Component:  Compiler          |           Version:  8.6.3
           Keywords:                    |  Operating System:  MacOS X
       Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
          Test Case:                    |        Blocked By:
           Blocking:                    |   Related Tickets:
Differential Rev(s):                    |         Wiki Page:
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 {{{#!diff
 --- /dev/null   2019-01-16 12:17:41.000000000 -0800
 +++ ghci/scripts/ghci063.run/ghci063.run.stderr.normalised      2019-01-16
 12:17:42.000000000 -0800
 @@ -0,0 +1,2 @@
 +
 +B.hs:1:1: parse error on input ‘***’
 }}}

 The test in question is just a normal `ghci_script` test:
 {{{
 :! echo module A where {} >A.hs
 :! echo module B where { import A } >B.hs

 :load B

 -- We're going to replace B.hs with an invalid module but without
 -- changing its timestamp.  A :reload should *not* look at the
 -- contents of the file, because the timestamp hasn't changed.
 :! cp B.hs B.hs-copy
 :! touch -r B.hs B.hs-copy
 :! echo "*** INVALID ***" >B.hs
 :! touch -r B.hs-copy B.hs

 :reload

 -- Put the original file back, now it should work
 :! cp B.hs-copy B.hs
 :reload
 }}}

 I have no idea why GHCi would be trying to parse the `!echo`, much less
 only on Darwin.

 This is currently the last issue Darwin issue keeping us from setting
 `allow_failure` to false so I'm going to mark this as broken.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16201>
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