[GHC] #15453: Bug in opt_trans_rule in OptCoercion

[GHC]

#15453: Bug in opt_trans_rule in OptCoercion
-------------------------------------+-------------------------------------
        Reporter:  ningning          |                Owner:  ningning
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5018
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by ningning):

 Replying to [comment:9 simonpj]:
 > If I found the sources, would anyone (Ryan?) be willing to
 >  * put (a version of) it in the GHC repo
 >  * update it to be correct, and to cover `GRefl`

 Also let me know if I could help with anything.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15453#comment:11>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler