[GHC] #10251: Bad rule generated in pathological cases

[GHC]

#10251: Bad rule generated in pathological cases
-------------------------------------+-------------------------------------
        Reporter:  simonpj           |                   Owner:
            Type:  bug               |                  Status:  merge
        Priority:  normal            |               Milestone:  7.10.2
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |  deSugar/should_compile/T10251
                                     |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
Changes (by simonpj):

 * status:  new => merge
 * testcase:   => deSugar/should_compile/T10251
 * milestone:   => 7.10.2


Comment:

 Very good, thanks for the report.

 This is worth merging to 7.10, because it makes the `bitmap` library
 compile again

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10251#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler