GHC crashes when calling typeRep on a promoted tuple

The following code (asking for the typeRep of a promoted tuple) causes GHC to crash.

import Data.Typeable
import Data.Proxy

x = typeRep (Proxy::Proxy '(Int,Int))

The error message is:

[1 of 1] Compiling Main             ( ../Bug.hs, interpreted )
GHC error in desugarer lookup in Main:
  Can't find interface-file declaration for variable $tc'(,)
    Probable cause: bug in .hi-boot file, or inconsistent .hi file
    Use -ddump-if-trace to get an idea of which file caused the error
ghc-stage2: panic! (the 'impossible' happened)
  (GHC version 8.1.20160518 for x86_64-unknown-linux):
        initDs IOEnv failure

Trac metadata

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