#7500: GHC: internal error: getMBlock: mmap: Operation not permitted
--------------------------+-------------------------------------------------
Reporter: guest | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.4.1 | Keywords:
Os: Linux | Architecture: Unknown/Multiple
Failure: Runtime crash | Blockedby:
Blocking: | Related:
--------------------------+-------------------------------------------------
Trying to calculate partition of a number using generating fuction with
memoization, like this:
{{{
#!/usr/bin/runhaskell
part'' :: Int -> Integer
part'' = ( map part' [0..] !!)
part' :: Int -> Integer
part' 0 = 1
part' 1 = 1
part' n =
sum $ map (\k ->
let kk = fromInteger(k); k1 = floor(1/2*kk*(3*kk-1)); k2 =
floor(1/2*kk*(3*kk+1)) in
(-1)^(k+1) * ( (part (n-k1)) + (part (n-k2))) ) [1..toInteger(n)]
part n =
if n < 0 then 0 else part'' n
main = print $ part 20000
}}}
Then i watch how memory usage grows up to 2G (RES) and program stops:
{{{
./bug.hs
bug.hs: internal error: getMBlock: mmap: Operation not permitted
(GHC version 7.4.1 for i386_unknown_linux)
Please report this as a GHC bug: http://www.haskell.org/ghc/reportab
}}}
The kernel is compiled with PAE, and machine has 8G of RAM
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7500>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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