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Simon Peyton Jones authored
Merge to STABLE please Liberate case was being far too gung-ho about what to specialise. This bug only showed up when a recursive function 'f' has a nested recursive function 'g', where 'g' calls 'f' (as well as recursively calling 'g'). This exact situation happens in GHC/IO.writeLines. This patch puts things right; see Note [When to specialise]. Result: much less code bloat.
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