#2739: GHC API crashes on template haskell splices
---------------------------------+------------------------------------------
Reporter: waern | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 6.10.1 | Severity: major
Keywords: | Testcase:
Architecture: Unknown/Multiple | Os: Unknown/Multiple
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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.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2739>
GHC <http://www.haskell.org/ghc/>
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