[Haskell-cafe] Spurious memory leak example from the wiki

I can't get the two examples (sum/product) in: https://wiki.haskell.org/Memory_leak#Holding_a_reference_for_a_too_long_time to behave differently under O2 or O0. Same profile report each time. Have changes to prelude (FTP? Rewrite rules/build stuff for folds?) made these do the same thing? The foldl/foldl' examples behave the same as you might expect. (216mb vs. 1mb of heap) --- Chris Allen