#1132: Data.ByteString.Lazy.Char8's readInt does no bounds checking
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Reporter: bos | Owner:
Type: bug | Status: closed
Priority: normal | Milestone:
Component: hslibs/data | Version: 6.6
Severity: normal | Resolution: invalid
Keywords: | Difficulty: Easy (1 hr)
Testcase: | Architecture: Multiple
Os: Multiple |
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Changes (by igloo):
* resolution: => invalid
* status: new => closed
Old description:
> I think it should be failing with Nothing if given a string of digits
> that's too long.
> {{{~ $ ghci
> ___ ___ _
> / _ \ /\ /\/ __(_)
> / /_\// /_/ / / | | GHC Interactive, version 6.6, for Haskell 98.
> / /_\\/ __ / /___| | http://www.haskell.org/ghc/
> \____/\/ /_/\____/|_| Type :? for help.
>
> Loading package base ... linking ... done.
> Prelude> :m +Data.ByteString.Lazy.Char8
> Prelude Data.ByteString.Lazy.Char8> readInt (pack "99999999999999999999")
> Just (7766279631452241919,LPS [])}}}
New description:
I think it should be failing with Nothing if given a string of digits
that's too long.
{{{
~ $ ghci
___ ___ _
/ _ \ /\ /\/ __(_)
/ /_\// /_/ / / | | GHC Interactive, version 6.6, for Haskell 98.
/ /_\\/ __ / /___| | http://www.haskell.org/ghc/
\____/\/ /_/\____/|_| Type :? for help.
Loading package base ... linking ... done.
Prelude> :m +Data.ByteString.Lazy.Char8
Prelude Data.ByteString.Lazy.Char8> readInt (pack "99999999999999999999")
Just (7766279631452241919,LPS [])
}}}
Comment:
Haskell doesn't define overflow behaviour, so I think this is no bugs.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1132>
GHC <http://www.haskell.org/ghc/>
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