Sorting big int with v"0.6"

Is this by design:

 | | |_| | | | (_| |  |  Version 0.6.0-dev.1746 (2016-12-29 05:44 UTC)
 _/ |\__'_|_|_|\__'_|  |  Commit 07b7a7f (3 days old master)
|__/                   |  x86_64-apple-darwin13.4.0

julia> sort([big(3), big(2)])
ERROR: MethodError: no method matching sub_with_overflow(::BigInt, ::BigInt)
 in #sort!#7(::Base.Sort.QuickSortAlg, ::Function, ::Function, ::Bool, ::Base.Order.ForwardOrdering, ::Function, ::Array{BigInt,1}) at ./sort.jl:445
 in #sort#8(::Array{Any,1}, ::Function, ::Array{BigInt,1}) at ./sort.jl:483
 in sort(::Array{BigInt,1}) at ./sort.jl:483

Sorting BigFloat works, and both work with earlier versions of Julia.

Seems like a bug to me, thanks for pointing it out. Would have to bisect to be sure, but my guess is this may have been introduced by ?