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. >
