dmdTransformDictSelSig panic

Installing xmlhtml with HEAD panicks, while it works in 7.6.3.

ghc: panic! (the 'impossible' happened)
  (GHC version 7.7.20130918 for x86_64-unknown-linux):
	dmdTransformDictSelSig: split failed

I reduced this panic to four files:

Common.hs

module Common where

import Data.String (fromString)

encodingName :: String
encodingName = fromString ""

Meta.hs

{-# OPTIONS_GHC -O0 #-}

module Meta where

import Data.String

Parse.hs

module Parse where

import Meta

XmlHtml.hs

module XmlHtml where

import Parse
import Common

Remove *.hi and *.o files and compile ghc -O XmlHtml to get the panic.

Trac metadata

Trac field	Value
Version	7.7
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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