This is not a bug, it's by design: http://docs.julialang.org/en/latest/manual/faq/#why-does-julia-use-native-machine-integer-arithmetic .
On Wed, Feb 12, 2014 at 11:20 AM, Eric Davies <[email protected]> wrote: > Those on 64-bit systems can replicate this bug with abs(2^63) or > abs(-9223372036854775808). > > The issue here is that the number 2^31 overflows the Int32 type to > -(2^31). The fact that it returns itself is somewhat coincidental. > > This is probably a bug, but there are sometimes reasons for allowing > overflow. > > On Wednesday, 12 February 2014 09:56:15 UTC-6, MikeEI wrote: >> >> abs(-2147483648) results in -2147483648 ??? >> >> @which(abs(-2147483648)) results in >> abs(x::Signed) at intfuncs.jl:29 >> >> Shouldn't the type system promote to Int64 as there is no corresponding >> Int32 value or indicate error? >> >> Just a newcomers/learners question. >> >> P.S.: Using version 0.2.0 (2013-11-16) on Linux Mint 32 bit system. >> >
