IPython mode (or Numbered prompt) does not accept an input only with comment

[hyrodium]

MRE:

In [1]: versioninfo()
Julia Version 1.9.0-rc2
Commit 72aec423c2a (2023-04-01 10:41 UTC)
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 16 × AMD Ryzen 7 2700X Eight-Core Processor
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-14.0.6 (ORCJIT, znver1)
  Threads: 1 on 16 virtual cores

In [2]: nothing  # ok

In [3]: # ng
ERROR: type Nothing has no field args
Stacktrace:
  [1] getproperty(x::Nothing, f::Symbol)
    @ Base ./Base.jl:37
  [2] get_usings!(usings::Vector{Any}, ex::Nothing)
    @ REPL.IPython ~/julia/julia-1.9.0-rc2/share/julia/stdlib/v1.9/REPL/src/REPL.jl:1423
  [3] out_transform(x::Any, n::Base.RefValue{Int64})
    @ REPL.IPython ~/julia/julia-1.9.0-rc2/share/julia/stdlib/v1.9/REPL/src/REPL.jl:1413
  [4] (::REPL.IPython.var"#5#6"{Base.RefValue{Int64}})(ast::Any)
    @ REPL.IPython ~/julia/julia-1.9.0-rc2/share/julia/stdlib/v1.9/REPL/src/REPL.jl:1476
  [5] #invokelatest#2
    @ ./essentials.jl:816 [inlined]
  [6] invokelatest
    @ ./essentials.jl:813 [inlined]
  [7] eval_user_input(ast::Any, backend::REPL.REPLBackend, mod::Module)
    @ REPL ~/julia/julia-1.9.0-rc2/share/julia/stdlib/v1.9/REPL/src/REPL.jl:151
  [8] repl_backend_loop(backend::REPL.REPLBackend, get_module::Function)
    @ REPL ~/julia/julia-1.9.0-rc2/share/julia/stdlib/v1.9/REPL/src/REPL.jl:249
  [9] start_repl_backend(backend::REPL.REPLBackend, consumer::Any; get_module::Function)
    @ REPL ~/julia/julia-1.9.0-rc2/share/julia/stdlib/v1.9/REPL/src/REPL.jl:234
 [10] run_repl(repl::REPL.AbstractREPL, consumer::Any; backend_on_current_task::Bool, backend::Any)
    @ REPL ~/julia/julia-1.9.0-rc2/share/julia/stdlib/v1.9/REPL/src/REPL.jl:377
 [11] run_repl(repl::REPL.AbstractREPL, consumer::Any)
    @ REPL ~/julia/julia-1.9.0-rc2/share/julia/stdlib/v1.9/REPL/src/REPL.jl:363
 [12] (::Base.var"#1019#1021"{Bool, Bool, Bool})(REPL::Module)
    @ Base ./client.jl:421
 [13] #invokelatest#2
    @ ./essentials.jl:816 [inlined]
 [14] invokelatest
    @ ./essentials.jl:813 [inlined]
 [15] run_main_repl(interactive::Bool, quiet::Bool, banner::Bool, history_file::Bool, color_set::Bool)
    @ Base ./client.jl:405
 [16] exec_options(opts::Base.JLOptions)
    @ Base ./client.jl:322
 [17] _start()
    @ Base ./client.jl:522

[PhyX-Meow]

It's OK for me

In [2]: versioninfo()
Julia Version 1.9.0-rc2
Commit 72aec423c2a (2023-04-01 10:41 UTC)
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 16 × AMD Ryzen 7 3700X 8-Core Processor
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-14.0.6 (ORCJIT, znver2)
  Threads: 1 on 16 virtual cores
Environment:
  LD_LIBRARY_PATH = .:../lib:./lib
  JULIA_PKG_SERVER = https://mirrors.tuna.tsinghua.edu.cn/julia

In [3]: nothing

In [4]: # ng

In [5]: 1+1
Out[5]: 2

What's your startup.jl? Here is mine:

import REPL
using Revise
using OhMyREPL
#  colorscheme!("GruvboxDark")
atreplinit() do repl
    if !isdefined(repl, :interface)
        repl.interface = REPL.setup_interface(repl)
    end
    REPL.ipython_mode!(repl)
end

[hyrodium]

Here's my startup.jl:

import REPL
atreplinit() do repl
    if !isdefined(repl, :interface)
        repl.interface = REPL.setup_interface(repl)
    end
    REPL.ipython_mode!(repl)
end

It seems the key difference is using OhMyREPL. By adding the line, the error was not reproduced.