[GHC] #13142: Substitution invariant failure arising from OptCoercion

[GHC]

#13142: Substitution invariant failure arising from OptCoercion
-------------------------------------+-------------------------------------
        Reporter:  jeiea             |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:  Determinism
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11371            |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by mpickering):

 * related:   => #11371


Comment:

 #11371 is related. There are still about 40 calls in the compiler where
 this isn't checked at all.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13142#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler