#1642: Space leak Control.Monad.Strict
--------------------------------+-------------------------------------------
Reporter: [EMAIL PROTECTED] | Owner:
Type: support request | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.7
Severity: critical | Keywords:
Difficulty: Unknown | Os: Unknown
Testcase: | Architecture: Unknown
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I wrote some code depending on Control.Monad.State.Strict, with the
assumption that it would run in constant space. This assumption was wrong.
Why? I included a runnable example.
{{{
import Control.Monad.State.Strict
data Foo = Foo !Int !Int deriving Show
foo = flip runState (Foo 1 2)
(forever $
Control.Monad.State.Strict.modify (\(Foo a b) -> Foo a
(b+1))
)
main = putStrLn (show foo)
}}}
I labeled it "critical", since not being able to use the State monad is
making the code less expressive.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1642>
GHC <http://www.haskell.org/ghc/>
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