UndefVarError: lib not defined

[EvergreenTree]

Hi sorry for bothering if the following bug is trivial. I got this with this example :

𝞗=Dict(:batchsize=>32,:epochs=>80,:ginp=>256,:genh=>[512],:disch=>[512],:optim=>Adam,:lr=>0.0002);
xtrn,ytrn,xtst,ytst = mnist()
global dtrn = minibatch(xtrn, ytrn, 𝞗[:batchsize]; xtype=atype)
global dtst = minibatch(xtst, ytst, 𝞗[:batchsize]; xtype=atype)
𝗪  = (𝗪g,𝗪d)  = initweights(𝞗[:genh], 𝞗[:ginp], 784), initweights(𝞗[:disch], 784, 1)
𝚶  = (𝚶pg,𝚶pd) = optimizers(𝗪g, 𝞗[:optim]; lr=𝞗[:lr]), optimizers(𝗪d,𝞗[:optim]; lr=𝞗[:lr])
generate_and_show(𝗪,100,𝞗)
runmodel(𝗪, dtst, 𝞗; optim=𝚶, train=false) # initial losses
runmodel(𝗪, dtrn, 𝞗; optim=𝚶, train=true, dtst=dtst) # training  

Out:
UndefVarError: lib not defined

Stacktrace:
[1] _broadcasted(::typeof(+), ::KnetArray{Float32,2}, ::KnetArray{Float32,2}, ::KnetArray{Float32,2}, ::Tuple{Tuple{Int64,Int64},Int64,Int64,Int64,Int64,Int64,Int64,Int64,Int64,Bool}) at /home/users/fuch/.julia/packages/Knet/LjPts/src/binary.jl:65
[2] broadcasted(::typeof(+), ::KnetArray{Float32,2}, ::KnetArray{Float32,2}) at /home/users/fuch/.julia/packages/Knet/LjPts/src/binary.jl:43
[3] #mlp#9(::Float64, ::Function, ::Function, ::typeof(mlp), ::Array{Any,1}, ::KnetArray{Float32,2}) at ./In[11]:3
[4] #mlp at ./none:0 [inlined]
[5] #G#11 at ./In[12]:3 [inlined]
[6] G(::Array{Any,1}, ::KnetArray{Float32,2}) at ./In[12]:3
[7] generate_and_show(::Tuple{Array{Any,1},Array{Any,1}}, ::Int64, ::Dict{Symbol,Any}) at ./In[15]:2
[8] top-level scope at In[17]:7

A little bit of debugging shows:

BB = 32
xx = 𝒩(𝞗[:ginp], BB)
# D(𝗪[1],xx)
a = 𝗪[1][1]*mat(xx)
b = 𝗪[1][2]
size(a),size(b)

Out:
((512, 32), (512, 1))

a.+b

Out:
UndefVarError: lib not defined

Stacktrace:
[1] _broadcasted(::typeof(+), ::KnetArray{Float32,2}, ::KnetArray{Float32,2}, ::KnetArray{Float32,2}, ::Tuple{Tuple{Int64,Int64},Int64,Int64,Int64,Int64,Int64,Int64,Int64,Int64,Bool}) at /home/users/fuch/.julia/packages/Knet/LjPts/src/binary.jl:65
[2] broadcasted(::typeof(+), ::KnetArray{Float32,2}, ::KnetArray{Float32,2}) at /home/users/fuch/.julia/packages/Knet/LjPts/src/binary.jl:43
[3] top-level scope at In[56]:1

It seems that broadcasting .+ between array(512,32) and array(512,1) produces this error. could anyone help resolve this? thanks in advance!

[EvergreenTree]

Nevertheless 'Array(a).+Array(b)' works. I suppose this is a bug of KnetArray