ERROR: MethodError: no method matching Union{Nothing, DebugAdapter.ConfigurationDoneArguments}(::Dict{String, Any})

[angelozerr]

I'm trying to consume Julia DAP server inside IntelliJ with https://github.com/redhat-developer/lsp4ij/blob/main/docs/dap/DAP.md

I have created a julia file like this:

using Pkg
Pkg.instantiate()

using Sockets
using DebugAdapter
using Logging

function start_debugger()
    try
        server_port = parse(Int, ARGS[1])
        server = Sockets.listen(server_port)
        println("Listening on port $server_port")

        conn = Sockets.accept(server)
        println("Client connected")

        debugsession = DebugAdapter.DebugSession(conn)
        run(debugsession)

        close(conn)
    catch e
        println("Error: ", e)
    end
end
start_debugger()

And when Run/Debug is occurred, I execute this file like this:

julia ...\server.jl 58550

The Julia DAP server can be intianlized and give me some DAP response but when configuration done is occured I have the following error:

ERROR: MethodError: no method matching Union{Nothing, DebugAdapter.ConfigurationDoneArguments}(::Dict{String, Any})

Here the full DAP traces:

julia ...\server.jl 58550
Listening on port 58550
Client connected
[Trace - 11:17:39] Sending request 'initialize - (1)'.
Params: {
  "clientID": "lsp4ij.debug",
  "clientName": "IntelliJ IDEA 2024.3",
  "adapterID": "julia",
  "linesStartAt1": true,
  "columnsStartAt1": true,
  "pathFormat": "path",
  "supportsVariableType": true,
  "supportsVariablePaging": false,
  "supportsStartDebuggingRequest": true
}


[Trace - 11:17:42] Received response 'initialize - (1)' in 3292ms.
Result: {
  "supportsConfigurationDoneRequest": true,
  "supportsFunctionBreakpoints": true,
  "supportsConditionalBreakpoints": true,
  "supportsHitConditionalBreakpoints": false,
  "supportsEvaluateForHovers": true,
  "exceptionBreakpointFilters": [
    {
      "filter": "error",
      "label": "Uncaught Exceptions",
      "default": true
    },
    {
      "filter": "throw",
      "label": "All Exceptions",
      "default": false
    }
  ],
  "supportsStepBack": false,
  "supportsSetVariable": true,
  "supportsRestartFrame": true,
  "supportsStepInTargetsRequest": true,
  "supportsCompletionsRequest": false,
  "additionalModuleColumns": [],
  "supportedChecksumAlgorithms": [],
  "supportsExceptionInfoRequest": true,
  "supportsLogPoints": false,
  "supportsTerminateRequest": true,
  "supportsDataBreakpoints": false
}


[Trace - 11:17:42] Sending request 'launch - (2)'.
Params: {
  "projectDir": "C:\\Users\\azerr\\Downloads\\TestSwift2\\swift-executable",
  "request": "launch",
  "exitAfterTaskReturns": false,
  "stopOnEntry": true,
  "debugAutoInterpretAllModules": false,
  "noDebug": true,
  "name": "Launch Julia file",
  "program": "C:\\Users\\azerr\\Downloads\\TestSwift2\\swift-executable\\test2.jl",
  "type": "julia"
}


[Trace - 11:17:43] Received notification 'initialized'
Params: null


[Trace - 11:17:43] Sending request 'configurationDone - (3)'.
Params: {}


ERROR: MethodError: no method matching Union{Nothing, DebugAdapter.ConfigurationDoneArguments}(::Dict{String, Any})
The type `Union{Nothing, DebugAdapter.ConfigurationDoneArguments}` exists, but no method is defined for this combination of argument types when trying to construct it.
Stacktrace:
 [1] dispatch_msg(x::DebugAdapter.DAPRPC.DAPEndpoint{TCPSocket, TCPSocket}, dispatcher::DebugAdapter.DAPRPC.MsgDispatcher, msg::Dict{String, Any})
   @ DebugAdapter.DAPRPC C:\Users\azerr\.julia\packages\DebugAdapter\Dbvzw\src\DAPRPC\typed.jl:78
 [2] (::DebugAdapter.var"#132#161"{Dict{String, Any}, Nothing, DebugAdapter.DAPRPC.MsgDispatcher, DebugAdapter.DAPRPC.DAPEndpoint{TCPSocket, TCPSocket}})()
   @ DebugAdapter C:\Users\azerr\.julia\packages\DebugAdapter\Dbvzw\src\packagedef.jl:98

Many thanks for your help!

[davidanthoff]

@angelozerr can you try with #105? I think that should fix it, but not entirely sure.

[angelozerr]

Thanks @davidanthoff for your answer.

To be honnest with you, I dont know julia. I have implemented dap client on intellij and I am trying with some dap servers like vscode js, swift, go which are working pretty well

As I have seen several people could be interested with julia debugging in IntelliJ, I have tried it.

My question, is how test your PR?

And why other dap client like nvim, email, vscode have not this problem?

[davidanthoff]

You can use the version of DebugAdapter from that branch by running pkg> add DebugAdapter#fix-type-bug in the pkg manager REPL, that should switch it over from the released version of DebugAdapater to the one where I (hopefully) fixed that bug.

And why other dap client like nvim, email, vscode have not this problem?

Yeah, that is a good question, I'm actually a bit confused about that as well...

[angelozerr]

It is working like a charm!

Thanks so much for your fix and to have helped me to use your fix.