#12954: unexpected uncaught segmentation error in arbitrary precision Integer calculations with modestly large numbers --------------------------------------+---------------------------------- Reporter: geraint | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 8.0.1 Keywords: | Operating System: MacOS X Architecture: x86_64 (amd64) | Type of failure: Runtime crash Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: --------------------------------------+---------------------------------- In ghci 8.0.1 on my mac, expressions no bigger than {{{2^(10^7) :: Integer}}} usually cause a bus error; {{{2^(10^6)}}} is apparently OK. The force of "usually" is that every now and then they and larger expressions are fine, so it is not quite reproducible. I believe it's the Integer arithmetic library, rather than the exponentiation, and I think it might be a stack overflow in libHSinteger- gmp-1.0.0.1-ghc8.0.1.dylib The problem was first encountered with compiled code doing additions and multiplications on similarly sized Integer values. Substantially larger numbers can be handled by 7.8.4 on other platforms, which is all I have to compare it with. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12954 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler