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Simon Peyton Jones authored
------------------------------------- Fix the big-tuple-from-desugaring problem ------------------------------------- The desugarer generates a tuple from - mutually recursive bindings - pattern bindings If either bind a lot of variables, GHC can generate a big tuple that isn't in the library, with subsequent disaster. This commit fixes the problem, by using nested tuples. It does *not* fix the problem with big tuples written by the user. And there's still a potential desugarer problem with parallel list comprehensions that bind a lot of variables (and parallel array comprehensions) -- but I expect they are much much rarer. The fix isn't fully tested yet -- I'll try to do that today.
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