[GHC] #7398: RULES don't apply to a newtype constructor

[GHC]

#7398: RULES don't apply to a newtype constructor
-------------------------------------+-------------------------------------
              Reporter:  shachaf     |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:  7.10.1
             Component:  Compiler    |          Version:  7.6.1
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:  Incorrect   |       Blocked By:
  result at runtime                  |  Related Tickets:  #6082
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by thomie):

 * related:   => #6082


Comment:

 The warnings were added in commit
 79062a8a0e9168b7f925c05699c30333563a9303:
 {{{
 Author: Simon Peyton Jones <>
 Date:   Mon Jul 23 09:17:09 2012 +0100

     Make the desugarer warn about RULES that may not fire

     This warning was suggested by Trac #6082, where we had
     a library RULE that failed to fire because its function
     was inlined too soon.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7398#comment:5>
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