fix stack/squeeze usage

src/compiler/loops.jl

@@ -1,4 +1,8 @@
-using ..Flux: stack, unstack
+unsqueeze(xs, dim = 1) = reshape(xs, (size(xs)[1:dim-1]..., 1, size(xs)[dim:end]...))
+squeeze(xs, dim = 1) = Base.squeeze(xs, dim)
+
+stack(xs, dim = 1) = cat(dim, unsqueeze.(xs, dim)...)
+unstack(xs, dim = 1) = [slicedim(xs, dim, i) for i = 1:size(xs, dim)]
 
 # Stateful Models
 

test/compiler.jl

@@ -1,6 +1,5 @@
 using DataFlow, MacroTools
-using Flux: squeeze, unsqueeze, stack
-using Flux.Compiler: @net, graph
+using Flux.Compiler: @net, graph, stack, squeeze, unsqueeze
 using DataFlow: Line, Frame
 
 @net type Affine