Error loading immutables when using Julia master

[jrevels]

julia> immutable Foo
           x::Int
           y::Int
       end

julia> using JLD

julia> JLD.save("test.jld", "f", Foo(1,1))

julia> JLD.load("test.jld", "f")
ERROR: type DataType has no field pointerfree
 in _gen_jlconvert_immutable(::JLD.JldTypeInfo, ::Any) at /Users/jarrettrevels/.julia/v0.5/JLD/src/jld_types.jl:454
 in gen_jlconvert(::JLD.JldTypeInfo, ::Any) at /Users/jarrettrevels/.julia/v0.5/JLD/src/jld_types.jl:551
 in jldatatype(::JLD.JldFile, ::HDF5.HDF5Datatype) at /Users/jarrettrevels/.julia/v0.5/JLD/src/jld_types.jl:694
 in read(::JLD.JldDataset) at /Users/jarrettrevels/.julia/v0.5/JLD/src/JLD.jl:381
 in read(::JLD.JldFile, ::String) at /Users/jarrettrevels/.julia/v0.5/JLD/src/JLD.jl:357
 in #jldopen#7(::Array{Any,1}, ::Function, ::JLD.##29#30{String}, ::String, ::Vararg{String,N}) at /Users/jarrettrevels/.julia/v0.5/JLD/src/JLD.jl:256
 in load(::FileIO.File{FileIO.DataFormat{:JLD}}, ::String) at /Users/jarrettrevels/.julia/v0.5/JLD/src/JLD.jl:1217
 in #load#13(::Array{Any,1}, ::Function, ::String, ::String, ::Vararg{String,N}) at /Users/jarrettrevels/.julia/v0.5/FileIO/src/loadsave.jl:45
 in load(::String, ::String) at /Users/jarrettrevels/.julia/v0.5/FileIO/src/loadsave.jl:45
 in eval(::Module, ::Any) at ./boot.jl:234
 in macro expansion at ./REPL.jl:92 [inlined]
 in (::Base.REPL.##1#2{Base.REPL.REPLBackend})() at ./event.jl:46

julia> versioninfo()
Julia Version 0.5.0-dev+5163
Commit 45ae7d8 (2016-07-05 17:15 UTC)
Platform Info:
  System: Darwin (x86_64-apple-darwin13.4.0)
  CPU: Intel(R) Core(TM) i5-4288U CPU @ 2.60GHz
  WORD_SIZE: 64
  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Haswell)
  LAPACK: libopenblas64_
  LIBM: libopenlibm
  LLVM: libLLVM-3.7.1 (ORCJIT, haswell)

ref various @nanosoldier benchmark job failures here, here, and likely here as well (I'm expecting it to fail)