@autosize does not work with semi-colon separated kwargs

[Saransh-cpp]

Package Version

master branch

Julia Version

1.8.2

OS / Environment

Software:

System Software Overview:

  System Version: macOS 12.6 (21G115)
  Kernel Version: Darwin 21.6.0

Hardware:

Hardware Overview:

  Model Name: MacBook Air
  Chip: Apple M1

Describe the bug

The @autosize macro throws an error (which looks unrelated to Flux) if the keyword arguments are separated by a semi-colon. The macro works if I run the same code, but with the semi-colon removed.

Steps to Reproduce

@autosize (3, 1) Chain(; c = Dense(_ => 2, sigmoid), b = BatchNorm(_, affine=false))

Expected Results

I expected this to work like it does without the semi-colon -

julia> @autosize (3, 1) Chain(c = Dense(_ => 2, sigmoid), b = BatchNorm(_, affine=false))
Chain(
  c = Dense(3 => 2, σ),                 # 8 parameters
  b = BatchNorm(2, affine=false),
)

Observed Results

ERROR: syntax: all-underscore identifier used as rvalue around /Users/saransh/Code/julia-dev/FluxML/Flux.jl/src/outputsize.jl:256
Stacktrace:
 [1] top-level scope
   @ REPL[5]:1
 [2] top-level scope
   @ ~/.julia/packages/CUDA/DfvRa/src/initialization.jl:52

Relevant log output

No response