jacobian not implemented in v0.6.3 ?

[stash-196]

To my understanding, a Jacobian function was added in #890, and this merge is included in v0.6.3.

However, the changes don't seem to exist on my Zygote v0.6.3.

(@v1.5) pkg> status Zygote
Status `~/.julia/environments/v1.5/Project.toml`
  [e88e6eb3] Zygote v0.6.3

julia> Zygote.jacobian
ERROR: UndefVarError: jacobian not defined
Stacktrace:
 [1] getproperty(::Module, ::Symbol) at ./Base.jl:26
 [2] top-level scope at REPL[8]:1

julia> Zygote.hessian
hessian (generic function with 1 method)

[stash-196]

For reference...
~/.julia/packages/Zygote/KpME9/src/Zygote.jl:

module Zygote

using LinearAlgebra, Statistics
using LinearAlgebra: copytri!, AbstractTriangular

import ZygoteRules: @adjoint, @adjoint!, AContext, adjoint, _pullback, pullback,
  literal_getproperty, literal_getfield

using ChainRules: ChainRules, rrule, unthunk
using IRTools
using MacroTools, Requires
using MacroTools: @forward

import Distributed: pmap, CachingPool, workers
export Params, gradient, pullback, pushforward, @code_adjoint

include("tools/idset.jl")
include("tools/buffer.jl")
include("tools/builtins.jl")

include("forward/Forward.jl")
using .Forward

include("compiler/reverse.jl")
include("compiler/emit.jl")
include("compiler/chainrules.jl")
include("compiler/interface.jl")
include("compiler/show.jl")

include("lib/grad.jl")
include("lib/lib.jl")
include("lib/number.jl")
include("lib/base.jl")
include("lib/array.jl")
include("lib/buffer.jl")
include("lib/broadcast.jl")
include("lib/forward.jl")
include("lib/utils.jl")
include("lib/range.jl")
@init @require Distances="b4f34e82-e78d-54a5-968a-f98e89d6e8f7" include("lib/distances.jl")
@init @require StatsFuns="4c63d2b9-4356-54db-8cca-17b64c39e42c" include("lib/statsfuns.jl")

# we need to define this late, so that the genfuncs see lib.jl
# Move using statements out of this file to help with sysimage building
using IRTools: varargs!, inlineable!, pis!, slots!
using IRTools.Inner: argnames!, update!
include("compiler/interface2.jl")

include("profiler/Profile.jl")

@init @require Tracker="9f7883ad-71c0-57eb-9f7f-b5c9e6d3789c" begin
  include("flux.jl")
end

@init @require Colors="5ae59095-9a9b-59fe-a467-6f913c188581" begin
  @nograd Colors.ColorTypes._parameter_upper_bound
end

using InteractiveUtils
precompile() = Requires.@include("precompile.jl")

# helps to work around 265-y issues
function refresh()
  Requires.@include("compiler/interface2.jl")
  precompile()
  return
end

macro profile(ex)
  @capture(ex, f_(x__)) || error("@profile f(args...)")
  quote
    _, back = _pullback($(esc(f)), $(esc.(x)...))
    Profile.juno(Profile.profile(back))
  end
end

end # module

beginning of ~/.julia/packages/Zygote/KpME9/Project.toml:

name = "Zygote"
uuid = "e88e6eb3-aa80-5325-afca-941959d7151f"
version = "0.6.3"

[darsnack]

It doesn't look like it made it into the release: v0.6.3...master

[stash-196]

...but it's like the 4th commit in v0.6.3...master. ("new jacobian implementation, and tests", 93a4c5b)

Does that not count? Was it rejected afterward?

[darsnack]

Those are commits that were added to master after 0.6.3 was released. The dates are a bit of misdirection, since they are the date the author committed to their PR branch, not the date that the commit was merged into master.

You can see the final merge commit landed on Feb 2 which was a day after 0.6.3 was released (I think).

[darsnack]

The commit that merged jacobian

The commit that the release points to

If you look at the commit history, you'll see that the jacobian commit is right after the release commit. Close but no cigar I'm afraid.

If you are excited to try jacobian, you can always use the master branch:

julia>]add Zygote#master

[stash-196]

Oh, I see now... that makes sense.

Sorry for the trouble, and thanks.

I'll be looking forward to the next release then:)

Edit: Didn't cross my mind to directly add the master branch. I just did and it's amazing, thx.