Debugger console broken, freezes and becomes unusable until reload

Issue Type: Bug

As of 1.64, built-in debug console in VSCode freezes after a short while and becomes completely unusable.

I had filed an issue a while back (#142292) when the problem appeared, but it mysteriously went away after some changes were made to the project. I self-closed the issue as it went away, stating I’d file a new issue if it came back, so here we are.

Long story short: when using "console": "internalConsole" (or just not specifying it), the debug console cannot switch between processes, does not take input from the console, and does not put out any messages from whatever process happens to be selected. Interestingly, however, collapsable messages (i.e. those with the click-able caret that shows more info) still work, but always display nothing. The problems dissappear when using "console": "integratedTerminal", but many features are then lost.

The Log (Window) Output is flooded with the following error:

Stack Trace

[2022-03-24 18:38:17.416] [renderer3] [error] TreeError [DebugRepl] Tree element not found: [object Object]: Error: TreeError [DebugRepl] Tree element not found: [object Object]
    at A.getElementLocation (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:73:20311)
    at A.isCollapsed (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:73:19448)
    at I.isCollapsed (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:215:676)
    at G.setChildren (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:215:21876)
    at G.doRefreshNode (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:215:20958)
    at async G.doRefreshSubTree (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:215:20450)
    at async G.refreshAndRenderNode (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:215:20002)
    at async G._updateChildren (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:215:17099)
    at async G.setInput (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:215:16542)
    at async Qn.selectSession (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:2263:1074)
    at async Qn.onDidFocusSession (vscode-file://vscode-app/c:/Users/User/AppData/Local/Programs/Microsoft%20VS%20Code/resources/app/out/vs/workbench/workbench.desktop.main.js:2255:6099)

As requested in the other issue, here’s a short clip of the console being frozen: Observe the left sidebar still correctly switching (as one is chrome and one is node).

The output that is visible here is actually old from a previous debugging session, and not even all of it: it appears to have stopped abruptly when trying to log an action. Clearing the console doesn’t work either.

For reference, here’s the launch.json I’ve got for those two processes:

launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "app",
            "type": "node",
            "request": "launch",
            "cwd": "${workspaceFolder}/packages/app",
            "runtimeExecutable": "${workspaceFolder}/node_modules/.bin/electron",
            "windows": {
                "runtimeExecutable": "${workspaceFolder}/node_modules/.bin/electron.cmd"
            },
            "env": {
                "DEBUG": "horizon:*"
            },
            "outFiles": ["${workspaceFolder}/packages/app/lib/**/*.js"],
            "autoAttachChildProcesses": true,
            "sourceMaps": true,
            "runtimeArgs": ["--remote-debugging-port=9333"],
            "args": ["./lib/main.js", "--enableDevTools", "--profile", "Debug"],
            "presentation": {
                "hidden": false,
                "group": "proc",
                "order": 1
            }
        },
        {
            "name": "client",
            "type": "chrome",
            "request": "attach",
            "port": 9333,
            "timeout": 60000,
            "webRoot": "${workspaceFolder}",
            "sourceMaps": true,
            "sourceMapPathOverrides": {
                "webpack:///./~/*": "${workspaceFolder}/node_modules",
                "webpack:///./*": "${workspaceFolder}/*",
                "webpack:///*": "*"
            },
            "presentation": {
                "hidden": false,
                "group": "proc",
                "order": 2
            }
        }
    ]
}

Happy to provide any other details as needed.

Edit: Fixed the image

---

VS Code version: Code 1.65.2 (c722ca6c7eed3d7987c0d5c3df5c45f6b15e77d1, 2022-03-10T14:33:55.248Z) OS version: Windows_NT x64 10.0.22000 Restricted Mode: No

System Info

Item	Value
CPUs	11th Gen Intel® Core™ i7-11370H @ 3.30GHz (8 x 3302)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on rasterization: enabled skia_renderer: enabled_on video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	15.79GB (4.54GB free)
Process Argv	–crash-reporter-id 4e827929-147b-4b09-b497-92eb6ff064f6
Screen Reader	no
VM	0%

Extensions: none

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[CynicalBusiness]

The project is unfortunately not open-source (a large internal private project), but I will try to see if I can get a minimal repro I can share working.

[roblourens]

ahhhhhhh - I’m not seeing it repro right now either. But it does get slower and slower to where it almost stops updating entirely. I can take another pass on looking at this next week.