id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
6140	segfault in OS X GHCi when dealing with infinite integers	olf		"GHCi happily reports the result of 1/0 to be ""Infinity"", but negating this value crashes. 
{{{
GHCi, version 6.10.4: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer ... linking ... done.
Loading package base ... linking ... done.
Prelude> 1/0
Infinity
Prelude> negate (1/0)
-Segmentation fault: 11
}}}

Bug occurs on OS X 10.7.4, ghc installed via MacPorts. 
This seems to be either an OS-specific issue, or maybe solved in later versions of ghc, since on a linux box it is not reproducible: 

{{{
GHCi, version 6.12.3: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
Prelude> 1/0
Infinity
Prelude> negate (1/0)
-Infinity
}}}
"	bug	closed	normal		GHCi	6.10.4	worksforme	segfault NaN Infinity		MacOS X	x86	Runtime crash	Unknown