[GHC] #14612: unsolved constraints, panic during compilation

[GHC]

#14612: unsolved constraints, panic during compilation
-------------------------------------+-------------------------------------
        Reporter:  msk               |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:  duplicate         |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13106            |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

 * status:  new => closed
 * resolution:   => duplicate
 * related:   => #13106


Comment:

 Yep, this is a duplicate of #13160. Here's the (proper) error you get on
 GHC 8.2.2:

 {{{
 $ /opt/ghc/8.2.2/bin/ghci Bug.hs
 GHCi, version 8.2.2: http://www.haskell.org/ghc/  :? for help
 Loaded GHCi configuration from /home/rgscott/.ghci
 [1 of 1] Compiling Main             ( Bug.hs, interpreted )

 Bug.hs:4:28: error:
     Variable not in scope: makeRect :: a0 -> Rectangle
   |
 4 | getWindowRect dpy w = fmap makeRect (getWindowAttributes dpy w)
   |                            ^^^^^^^^

 Bug.hs:4:38: error:
     • Variable not in scope:
         getWindowAttributes :: Display -> Window -> IO a0
     • Perhaps you meant ‘setLineAttributes’ (imported from
 Graphics.X11.Xlib)
   |
 4 | getWindowRect dpy w = fmap makeRect (getWindowAttributes dpy w)
   |                                      ^^^^^^^^^^^^^^^^^^^
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14612#comment:2>
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