VSCode Evaluating Stuck

[yasirroni]

In VSCode REPL, running simple julia, when entering evaluation mode, it stuck. Here is the example that I want to evaluate 1|julia> x. Only after I press ctrl + c that it stop. When I evaluating 1|julia> i for example, it didn't stuck and directly report ERROR: UndefVarError: inot defined inMain`.

using Debugger

function f(x)
    if x < 0
        @bp
    else
        println("All good!")
    end
end

Debugger.@enter f(-2)

Here is the Stacktrace for the 1|julia> x.

In f(x) at REPL[28]:1
 1  function f(x)
>2             if x < 0
 3                 @bp
 4             else
 5                 println("All good!")
 6             end
 7         end

About to run: (<)(-2, 0)
1|julia> x
^C
ERROR: InterruptException:
Stacktrace:
  [1] try_yieldto(undo::typeof(Base.ensure_rescheduled))
    @ Base ./task.jl:958
  [2] wait()
    @ Base ./task.jl:1022
  [3] wait(c::Base.GenericCondition{Base.Threads.SpinLock}; first::Bool)
    @ Base ./condition.jl:130
  [4] wait
    @ ./condition.jl:125 [inlined]
  [5] _wait(t::Task)
    @ Base ./task.jl:328
  [6] wait(t::Task)
    @ Base ./task.jl:368
  [7] fetch
    @ ./task.jl:390 [inlined]
  [8] (::Debugger.var"#27#30"{Debugger.DebuggerState})(s::REPL.LineEdit.MIState, buf::IOBuffer, ok::Bool)
    @ Debugger ~/.julia/packages/Debugger/wueAn/src/repl.jl:196
  [9] #invokelatest#2
    @ ./essentials.jl:1055 [inlined]
 [10] invokelatest
    @ ./essentials.jl:1052 [inlined]
 [11] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
    @ REPL.LineEdit ~/.julia/juliaup/julia-1.11.5+0.aarch64.apple.darwin14/share/julia/stdlib/v1.11/REPL/src/LineEdit.jl:2755
 [12] run_interface
    @ ~/.julia/juliaup/julia-1.11.5+0.aarch64.apple.darwin14/share/julia/stdlib/v1.11/REPL/src/LineEdit.jl:2749 [inlined]
 [13] RunDebugger(frame::JuliaInterpreter.Frame, repl::Nothing, terminal::Nothing; initial_continue::Bool)
    @ Debugger ~/.julia/packages/Debugger/wueAn/src/repl.jl:167
 [14] RunDebugger
    @ ~/.julia/packages/Debugger/wueAn/src/repl.jl:12 [inlined]
 [15] RunDebugger(frame::JuliaInterpreter.Frame)
    @ Debugger ~/.julia/packages/Debugger/wueAn/src/repl.jl:12
 [16] macro expansion
    @ ~/.julia/packages/Debugger/wueAn/src/Debugger.jl:127 [inlined]
 [17] top-level scope
    @ REPL[29]:1

julia> -2

VSCode Info:

Version: 1.99.1
Commit: 7c6fdfb0b8f2f675eb0b47f3d95eeca78962565b
Date: 2025-04-04T15:58:59.624Z (1 mo ago)
Electron: 34.3.2
ElectronBuildId: 11161073
Chromium: 132.0.6834.210
Node.js: 20.18.3
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.4.0

Julia version: Version 1.11.5 (2025-04-14).

[pfitzseb]

You'll have to run the entrypoint (Debugger.@enter f(-2)) in the REPL directly instead of via inline evaluation if you want the Debugger REPL to work properly.

[yasirroni]

@pfitzseb thanks for answering, but I'm using REPL only, without anything. Waiting more than 5 minutes and it still stuck. I also try to use zsh terminal, not VSCode, and it also stuck. Here is the interaction, both VSCode and zsh is the same:

macbookair@Macbooks-MacBook-Air playground % julia
               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.11.5 (2025-04-14)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

julia> using Debugger

julia> function f(x)
           if x < 0
               @bp
           else
               println("All good!")
           end
       end
f (generic function with 1 method)

julia> (Debugger.@enter f(-2))

In f(x) at REPL[2]:1
 1  function f(x)
>2      if x < 0
 3          @bp
 4      else
 5          println("All good!")
 6      end
 7  end

About to run: (<)(-2, 0)
1|debug> 
no previous command executed
1|julia> x

Here is the image:

But this one has different error:

1|julia> x
ERROR: InterruptException:
Stacktrace:
  [1] poptask(W::Base.IntrusiveLinkedListSynchronized{Task})
    @ Base ./task.jl:1012
  [2] wait()
    @ Base ./task.jl:1021
  [3] wait(c::Base.GenericCondition{ReentrantLock}; first::Bool)
    @ Base ./condition.jl:130
  [4] wait
    @ ./condition.jl:125 [inlined]
  [5] take_buffered(c::Channel{Any})
    @ Base ./channels.jl:493
  [6] take!
    @ ./channels.jl:487 [inlined]
  [7] eval_with_backend
    @ ~/.julia/juliaup/julia-1.11.5+0.aarch64.apple.darwin14/share/julia/stdlib/v1.11/REPL/src/REPL.jl:1006 [inlined]
  [8] print_response(errio::IO, response::Any, backend::Union{…}, show_value::Bool, have_color::Bool, specialdisplay::Union{…})
    @ REPL ~/.julia/juliaup/julia-1.11.5+0.aarch64.apple.darwin14/share/julia/stdlib/v1.11/REPL/src/REPL.jl:436
  [9] (::REPL.var"#70#71"{REPL.LineEditREPL, Tuple{Int64, Bool}, Bool, Bool})(io::Any)
    @ REPL ~/.julia/juliaup/julia-1.11.5+0.aarch64.apple.darwin14/share/julia/stdlib/v1.11/REPL/src/REPL.jl:405
 [10] with_repl_linfo(f::Any, repl::REPL.LineEditREPL)
    @ REPL ~/.julia/juliaup/julia-1.11.5+0.aarch64.apple.darwin14/share/julia/stdlib/v1.11/REPL/src/REPL.jl:678
 [11] print_response(repl::REPL.AbstractREPL, response::Any, show_value::Bool, have_color::Bool)
    @ REPL ~/.julia/juliaup/julia-1.11.5+0.aarch64.apple.darwin14/share/julia/stdlib/v1.11/REPL/src/REPL.jl:403
 [12] (::Debugger.var"#28#31"{Tuple{Int64, Bool}, Debugger.DebuggerState})()
    @ Debugger ~/.julia/packages/Debugger/wueAn/src/repl.jl:196
Some type information was truncated. Use `show(err)` to see complete types.

[ReubenJ]

Looks to be a duplicate of #373

[yasirroni]

Close this is issue in favour of #373.