simonpj 2003/10/27 05:28:09 PST
Modified files: (Branch: ghc-6-2-branch)
ghc/compiler/rename RnHsSyn.lhs
Log:
ruleDeclFVs wasn't treating the head variable as a free variable
That in turn led to an obsure crash in --make when type-checking
an interface. This didn't happen in 6.0.1, for some reason, only
in the 6.2 branch.
No test, because irrelevant for the HEAD, and awkard to provoke.
The message is below. Note you have to compile twice.
----------
module Local.Test where
import Local.Rules
module Local.Rules (genericLength) where
import Data.List (genericLength)
{-# RULES "generic/length" genericLength = length #-}
-----------
D:\lib\Local> ghc -O -fglasgow-exts --make -i.. Test.hs
Chasing modules from: Test.hs
Compiling Local.Rules ( ../Local/Rules.hs, ../Local/Rules.o )
Compiling Local.Test ( Test.hs, ./Test.o )
D:\lib\Local> ghc -O -fglasgow-exts --make -i.. Test.hs
Chasing modules from: Test.hs
Skipping Local.Rules ( ../Local/Rules.hs, ../Local/Rules.o )
tcLookupGlobal (id): `Data.List.genericLength' is not in scope
When checking the transformation rule "generic/length"
Revision Changes Path
1.72.2.2 +4 -3 fptools/ghc/compiler/rename/RnHsSyn.lhs
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