An even simpler example, with just one module:
-------------------------------------------------------
module Test where
import Data.List (genericLength)
{-# RULES
"genericLength/length" genericLength = length
#-}
-------------------------------------------------------
D:\...\hask> ghc -O -fglasgow-exts --make Test.hs
Chasing modules from: Test.hs
Compiling Test ( Test.hs, ./Test.o )
D:\...\hask> ghc -O -fglasgow-exts --make Test.hs
Chasing modules from: Test.hs
Skipping Test ( Test.hs, ./Test.o )
tcLookupGlobal (id): `Data.List.genericLength' is not in scope
When checking the transformation rule "genericLength/length"
Surely that *must* be a bug, mustn't?
Juanma
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