[GHC] #14934: Repeated "impossible" go_axiom_rule error.

[GHC]

#14934: Repeated "impossible" go_axiom_rule error.
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        Reporter:  galen             |                Owner:  (none)
            Type:  bug               |               Status:  infoneeded
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.4.1
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * status:  new => infoneeded


Comment:

 We'll likely need some more information before we can debug this.

 As a start, you mentioned that you experienced this bug when recompiling
 modules after a change, which isn't
 [https://ghc.haskell.org/trac/ghc/ticket/13695 unheard of]. Can you point
 us to a project of yours where:

 1. Building it,
 2. Making some change, and
 3. Rebuilding

 Produces the panic?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14934#comment:1>
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