ByteString.Lazy.Char8 (Not enough space)

Question

This code gives <stdin>: hGetBufSome: resource exhausted (Not enough space) error as soon as it's executed.

import qualified Data.ByteString.Lazy.Char8 as B8
main = do
    (l:_) <- B8.lines `fmap` B8.getContents
    B8.putStrLn l

I'm just trying to get the first line. So because of lazy loading it wouldn't try to get others right? I can't figure out how to avoid this error.

What version of GHC and OS are you running on? – ErikR Nov 18 '14 at 06:51 — ErikR, Nov 18 '14 at 06:51
and is your GHC 32-bit or 64-bit? – ErikR Nov 18 '14 at 07:01 — ErikR, Nov 18 '14 at 07:01
Windows 7 x64, GCH 64 bit – Dulguun Otgon Nov 18 '14 at 08:59 — Dulguun Otgon, Nov 18 '14 at 08:59

score 2 · Accepted Answer · answered Nov 18 '14 at 07:25

2

There seems to be a problem with lazy bytestrings on 64-bit Windows 7, e.g.

Since the reports are all from over a year ago, I would try using GHC 7.8.3 (for example, from the Haskell Platform 2014.2.0.0) if you are not already using that version.

answered Nov 18 '14 at 07:25

ErikR

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Should I switch to 32bit version? – Dulguun Otgon Nov 18 '14 at 09:01
Oh ****, I've just spent few hours trying to figure it out assuming that it was my fault, since I'm the newbie – Dulguun Otgon Nov 18 '14 at 13:37
Yeah - I would try that. Are you using the Haskell Platform? – ErikR Nov 18 '14 at 16:11
Yes, HaskellPlatform-2014.2.0.0-x86_64 – Dulguun Otgon Nov 19 '14 at 00:45

score 1 · Answer 2 · answered Feb 27 '16 at 01:37

1

Here's the bug report against GHC on this issue: https://ghc.haskell.org/trac/ghc/ticket/11009#ticket

I guess the solution for now is to not use getContents on lazy bytestrings (switch to strict or just read incrementally).

answered Feb 27 '16 at 01:37

sclv

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ByteString.Lazy.Char8 (Not enough space)

2 Answers2