[GHC] #16028: tyThingCoAxiom panics while building Agda

[GHC]

#16028: tyThingCoAxiom panics while building Agda
-------------------------------------+-------------------------------------
           Reporter:  iliastsi       |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.4
          Component:  Compiler       |           Version:  8.4.4
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:  arm            |   Type of failure:  Compile-time
                                     |  crash or panic
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 ghc-8.4.4 panics while building Agda on armhf
 (https://buildd.debian.org/status/fetch.php?pkg=agda&arch=armhf&ver=2.5.4.1-3%2Bb1&stamp=1544132023&raw=0):
 {{{
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.4.4 for arm-unknown-linux):
         tyThingCoAxiom
   Identifier ‘fromDescListWithKey’
   Call stack:
       CallStack (from HasCallStack):
         callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in
 ghc:Outputable
         pprPanic, called at compiler/main/HscTypes.hs:2153:32 in
 ghc:HscTypes

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
 }}}

 The same version of Agda builds fine with ghc-8.4.3 on armhf
 (https://buildd.debian.org/status/fetch.php?pkg=agda&arch=armhf&ver=2.5.4.1-3&stamp=1540145469&raw=0).

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16028>
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