GHC API crashes on template haskell splices

The GHC API crashes when type checking these two modules:

TH.hs:

{-# LANGUAGE TemplateHaskell #-}

module TH where

import Language.Haskell.TH

decl = [d| f x = x]

TH2.hs:

{-# LANGUAGE TemplateHaskell #-}

module TH2 where

import TH

$( decl )

The crash happens in HscMain.compileExpr, when compiling and linking the spliced-in code. The crash is due to a fromJust: Nothing. I don't have the error message at hand.

It would be nice if this could be fixed in 6.10.* since it makes Haddock crash when processing several packages on Hackage.

I will add both TH.hs and TH2.hs to the test suite in the code.haskell.org/haddock repository later. (I thought I had done this, but I apparently forgot to add TH.hs). You can the use test/runtests.hs to invoke the crash.

Trac metadata

Trac field	Value
Version	6.10.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
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