[GHC] #9204: Conflicting definition in hs-boot file

14 Jun 2014


      #9204: Conflicting definition in hs-boot file
------------------------------------+-------------------------------------
       Reporter:  Feuerbach         |             Owner:
           Type:  bug               |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  Compiler          |           Version:  7.8.2
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
------------------------------------+-------------------------------------
 Foo.hs:

 {{{
 module Foo where

 import Bar

 data Foo a
 }}}

 Foo.hs-boot:
 {{{
 module Foo where

 data Foo a
 }}}

 Bar.hs:
 {{{
 module Bar where
 import {-# SOURCE #-} Foo
 }}}

 With GHC 7.8.2 I'm getting the error

 {{{
 Foo.hs-boot:3:1:
     Type constructor ‘Foo’ has conflicting definitions in the module
     and its hs-boot file
     Main module: type role Foo phantom
                  data Foo a
     Boot file:   data Foo a
 }}}

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9204
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