Debug dart project can not trigger breakpoints

[xhcoding]

run dap-debug command and select Dart :: Debug ，the program does not stop at the breakpoint

set dap-print-io to t , server did not send the stopped event. Everything is normal with vscode

dap-print-io

Sending: 
{
  "command": "initialize",
  "arguments": {
    "clientID": "vscode",
    "clientName": "Visual Studio Code",
    "adapterID": "dart",
    "pathFormat": "path",
    "linesStartAt1": true,
    "columnsStartAt1": true,
    "supportsVariableType": true,
    "supportsVariablePaging": true,
    "supportsRunInTerminalRequest": true,
    "locale": "en-us"
  },
  "type": "request",
  "seq": 1
}
Received:
{
  "seq": 1,
  "type": "response",
  "request_seq": 1,
  "command": "initialize",
  "success": true,
  "body": {
    "supportsConfigurationDoneRequest": true,
    "supportsEvaluateForHovers": true,
    "supportsDelayedStackTraceLoading": true,
    "supportsConditionalBreakpoints": true,
    "supportsLogPoints": true,
    "supportsTerminateRequest": true,
    "supportsRestartFrame": true,
    "supportsClipboardContext": true,
    "exceptionBreakpointFilters": [
      {
        "filter": "All",
        "label": "All Exceptions",
        "default": null
      },
      {
        "filter": "Unhandled",
        "label": "Uncaught Exceptions",
        "default": true
      }
    ]
  }
}
Sending: 
{
  "command": "launch",
  "arguments": {
    "name": "Dart :: Debug",
    "type": "dart",
    "request": "launch",
    "dartSdkPath": "d:/Applications/Scoop/apps/dart/current/",
    "maxLogLineLength": 2000,
    "cwd": "d:/Code/Dart/hello_world/",
    "vmAdditionalArgs": [],
    "vmServicePort": 0,
    "debugExternalLibraries": null,
    "debugSdkLibraries": null,
    "evaluateGettersInDebugViews": true,
    "evaluateToStringInDebugViews": true,
    "flutterSdkPath": "d:/",
    "flutterTrackWidgetCreation": true,
    "useFlutterStructuredErrors": true,
    "useWriteServiceInfo": true,
    "debuggerHandlesPathsEverywhereForBreakpoints": true,
    "output-filter-function": "lsp-dart-dap--output-filter-function",
    "program": "d:/Code/Dart/hello_world/bin/main.dart"
  },
  "type": "request",
  "seq": 2
}
Received:
{
  "seq": 2,
  "type": "event",
  "event": "dart.progressStart",
  "body": {
    "progressID": "launch",
    "message": "Launching…"
  }
}
Received:
{
  "seq": 3,
  "type": "response",
  "request_seq": 2,
  "command": "launch",
  "success": true
}
Received:
{
  "seq": 4,
  "type": "event",
  "event": "dart.log",
  "body": {
    "message": "Starting to poll for file C:\\Users\\xhcoding\\AppData\\Local\\Temp\\dart-vm-service-bed3.json",
    "severity": 0,
    "category": 10
  }
}
Received:
{
  "seq": 5,
  "type": "event",
  "event": "dart.log",
  "body": {
    "message": "Successfully read JSON from C:\\Users\\xhcoding\\AppData\\Local\\Temp\\dart-vm-service-bed3.json which indicates URI http://127.0.0.1:64382/kCAV2Nlx5Vg=/",
    "severity": 0,
    "category": 10
  }
}
Received:
{
  "seq": 6,
  "type": "event",
  "event": "dart.log",
  "body": {
    "message": "Stopping polling for file C:\\Users\\xhcoding\\AppData\\Local\\Temp\\dart-vm-service-bed3.json",
    "severity": 0,
    "category": 10
  }
}
Received:
{
  "seq": 7,
  "type": "event",
  "event": "dart.debuggerUris",
  "body": {
    "observatoryUri": "http://127.0.0.1:64382/kCAV2Nlx5Vg=/",
    "vmServiceUri": "http://127.0.0.1:64382/kCAV2Nlx5Vg=/"
  }
}
Received:
{
  "seq": 8,
  "type": "event",
  "event": "output",
  "body": {
    "category": "console",
    "output": "Connecting to VM Service at http://127.0.0.1:64382/kCAV2Nlx5Vg=/\n"
  }
}
Received:
{
  "seq": 9,
  "type": "event",
  "event": "dart.progressEnd",
  "body": {
    "progressID": "launch"
  }
}
Received:
{
  "seq": 10,
  "type": "event",
  "event": "initialized"
}
Sending: 
{
  "command": "setBreakpoints",
  "arguments": {
    "source": {
      "name": "main.dart",
      "path": "d:\\Code\\Dart\\hello_world\\bin\\main.dart"
    },
    "breakpoints": [
      {
        "line": 2
      }
    ],
    "sourceModified": false,
    "lines": [
      2
    ]
  },
  "type": "request",
  "seq": 3
}
Received:
{
  "seq": 11,
  "type": "response",
  "request_seq": 3,
  "command": "setBreakpoints",
  "success": true,
  "body": {
    "breakpoints": [
      {
        "verified": true
      }
    ]
  }
}
Sending: 
{
  "command": "setExceptionBreakpoints",
  "arguments": {
    "filters": [
      "Unhandled"
    ]
  },
  "type": "request",
  "seq": 4
}
Received:
{
  "seq": 12,
  "type": "response",
  "request_seq": 4,
  "command": "setExceptionBreakpoints",
  "success": true
}
Sending: 
{
  "command": "configurationDone",
  "type": "request",
  "seq": 5
}
Received:
{
  "seq": 13,
  "type": "response",
  "request_seq": 5,
  "command": "configurationDone",
  "success": true
}
Received:
{
  "seq": 14,
  "type": "event",
  "event": "thread",
  "body": {
    "reason": "started",
    "threadId": 0
  }
}
Sending: 
{
  "command": "threads",
  "type": "request",
  "seq": 6
}
Received:
{
  "seq": 15,
  "type": "response",
  "request_seq": 6,
  "command": "threads",
  "success": true,
  "body": {
    "threads": [
      {
        "id": 0,
        "name": "main"
      }
    ]
  }
}
Received:
{
  "seq": 16,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.getHttpEnableTimelineLogging",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 17,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.setHttpEnableTimelineLogging",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 18,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.httpEnableTimelineLogging",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 19,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.getSocketProfile",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 20,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.startSocketProfiling",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 21,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.pauseSocketProfiling",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 22,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.socketProfilingEnabled",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 23,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.clearSocketProfile",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 24,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.getVersion",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 25,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.getHttpProfile",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 26,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.getHttpProfileRequest",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 27,
  "type": "event",
  "event": "dart.serviceExtensionAdded",
  "body": {
    "extensionRPC": "ext.dart.io.clearHttpProfile",
    "isolateId": "isolates/877492264347811"
  }
}
Received:
{
  "seq": 28,
  "type": "event",
  "event": "output",
  "body": {
    "category": "stdout",
    "output": "Hello world!\n"
  }
}
Received:
{
  "seq": 29,
  "type": "event",
  "event": "thread",
  "body": {
    "reason": "exited",
    "threadId": 0
  }
}
Sending: 
{
  "command": "threads",
  "type": "request",
  "seq": 7
}
Received:
{
  "seq": 30,
  "type": "event",
  "event": "output",
  "body": {
    "category": "console",
    "output": "Exited\n"
  }
}
Received:
{
  "seq": 31,
  "type": "event",
  "event": "terminated"
}
Debug session process exited with status: killed

To Reproduce

1. dart create hello_world
2. open bin/main.dart with emacs , add breakpoint and run dap-debug

Expected behavior
It can be debugged normally

Screenshots

Version
Include here the result of: M-x lsp-dart-version

[LSP Dart] 1.21.0 at 2022.01.20 @ Emacs 29.0.50
[Dart SDK] Dart SDK version: 2.15.1 (stable) (Tue Dec 14 13:32:21 2021 +0100) on "windows_x64"

[Flutter SDK] d:/
[Flutter project] false
[Project entrypoint] d:/Code/Dart/hello_world/bin/main.dart

[xhcoding]

Everything is ok on Ubuntu , maybe dap-mode does not work well on Windows

[ericdallo]

yeah, have no idea, maybe @yyoncho knows if it could be related with Windows?

[xhcoding]

After analyzing vscode and Dart-Code communication data, I found that after changing d: to D: , DAP mode can work normally.

not work:

Sending: 
{
  "command": "launch",
  "arguments": {
    "name": "Dart :: Debug",
    "type": "dart",
    "request": "launch",
    "dartSdkPath": "d:/Applications/Scoop/apps/dart/current/",
    "maxLogLineLength": 2000,
    "cwd": "d:/Code/Dart/hello_world/",
    "vmAdditionalArgs": [],
    "vmServicePort": 0,
    "debugExternalLibraries": null,
    "debugSdkLibraries": null,
    "evaluateGettersInDebugViews": true,
    "evaluateToStringInDebugViews": true,
    "flutterSdkPath": "d:/",
    "flutterTrackWidgetCreation": true,
    "useFlutterStructuredErrors": true,
    "useWriteServiceInfo": true,
    "debuggerHandlesPathsEverywhereForBreakpoints": true,
    "output-filter-function": "lsp-dart-dap--output-filter-function",
    "program": "d:/Code/Dart/hello_world/bin/main.dart"
  },
  "type": "request",
  "seq": 2
}

work:

Sending: 
{
  "command": "launch",
  "arguments": {
    "name": "Dart :: Debug",
    "type": "dart",
    "request": "launch",
    "dartSdkPath": "D:/Applications/Scoop/apps/dart/current/",
    "maxLogLineLength": 2000,
    "cwd": "D:/Code/Dart/hello_world/",
    "vmAdditionalArgs": [],
    "vmServicePort": 0,
    "debugExternalLibraries": null,
    "debugSdkLibraries": null,
    "evaluateGettersInDebugViews": true,
    "evaluateToStringInDebugViews": true,
    "flutterSdkPath": "D:/",
    "flutterTrackWidgetCreation": true,
    "useFlutterStructuredErrors": true,
    "useWriteServiceInfo": true,
    "debuggerHandlesPathsEverywhereForBreakpoints": true,
    "output-filter-function": "lsp-dart-dap--output-filter-function",
    "program": "D:/Code/Dart/hello_world/bin/main.dart"
  },
  "type": "request",
  "seq": 2
}

I believe this is Dart-Code's bug, I will open a issue to Dart-Code

[xhcoding]

I reopen this issue, because finally we have to solve this problem on the client side.
Look Dart-Code/Dart-Code#3796

[ericdallo]

@xhcoding If I understood correctly, we should always send the cwd disk label for windows as upper case? is that right?

[xhcoding]

@ericdallo Yes, your are right.

[ericdallo]

Thanks, feel free to give a try, the code is on lsp-dart-dap.el, otherwise I can take a look later this week