id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
2665,Compiler hangs,rolyp,,"Sorry for not providing a more specific summary.

The following code hangs the 6.8.2 compiler:

data U a = U [a] [a]

row :: a -> U a
row u = U (iterate (fmap id) u) (iterate (fmap id) u)

This is the entire program.  Simpler versions seem to make the problem go away, although I haven't investigated in detail.  I'm running without any special compiler options enabled.

I have a suspicion this may be related to the problem with the inliner described at 
http://www.haskell.org/ghc/docs/latest/html/users_guide/bugs.html#bugs-ghc.

cheers,
Roly
",bug,closed,normal,,Compiler,6.8.2,fixed,,,Unknown/Multiple,Unknown/Multiple,,Unknown,,,,