24 Jan 2010 07:39
GenC.hs:153:37
Hi,
I've just come across the GenC.hs:153:37 bug that has been mentioned on this mailing list a few times before:
[22 of 23] Compiling GenC ( GenC.hs, GenC.o )
GenC.hs:153:37:
Couldn't match expected type `[t]'
against inferred type `Maybe Type'
In the first argument of `mplus', namely `M.lookup v' tm'
In the expression: M.lookup v' tm `mplus` M.lookup v' etm
In a stmt of a list comprehension:
t <- M.lookup v' tm `mplus` M.lookup v' etm
I'm using OS X 10.6.2 and ghc 6.10.4. Has anyone figured out a solution to this problem?
Thanks,
Todd
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