aws package fails to build with master

The aws package from Hackage fails to build with master,

[22 of 76] Compiling Aws.DynamoDb.Core ( Aws/DynamoDb/Core.hs, /home/ben/code/mediawiki-annotate/dist-newstyle/build/x86_64-linux/ghc-8.1.20170209/aws-0.14.1/build/Aws/DynamoDb/Core.p_o )
ghc: panic! (the 'impossible' happened)
  (GHC version 8.1.20170209 for x86_64-unknown-linux):
	completeCall
  $wloop_length_s18Cv
  Stop[BoringCtxt] Int# -> Int# -> Int
  Call stack:
      CallStack (from HasCallStack):
        prettyCurrentCallStack, called at compiler/utils/Outputable.hs:1188:58 in ghc:Outputable
        callStackDoc, called at compiler/utils/Outputable.hs:1192:37 in ghc:Outputable
        pprPanic, called at compiler/simplCore/Simplify.hs:1598:9 in ghc:Simplify

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

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	highest
Resolution	Unresolved
Component	Compiler
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