#5541: Data.Bits.setBit misbehaves on bad input
---------------------------------+------------------------------------------
Reporter: nomeata | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.0.4 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: Runtime crash
---------------------------------+------------------------------------------
While
{{{
ghc -e 'Data.Bits.setBit 0 (2^36::Int) :: Integer'
}}}
seems to “work” (allocates lots of memory and keeps calculating), it mis-
behaves with larger numbers:
{{{
$ ghc -e 'Data.Bits.setBit 0 (2^37::Int) :: Integer'
gmp: overflow in mpz type
Abgebrochen
}}}
If gmp cannot cope with that number, an exception should be raised, but
not the whole process terminated.
Natuarlly, this is not a very critical bug.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5541>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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