"Unable to attach to browser" when trying to debug, Ubuntu, Chrome

[mofojed]

Type: Bug

Does this issue occur when all extensions are disabled?: Yes

When I try to launch Chromium using the "Run and Debug" option in VSCode, it fails after a couple seconds with an error saying "Unable to attach to browser".

I've tried opening the launch.json and adding the runtimeExecutable path to my Chromium install, and it still gives the same error.

I've tried uninstalling Chromium and reinstalling using sudo apt install chromium-browser, same error.

Chrome Version: 111.0.5563.146

My launch.json:

{
  // Use IntelliSense to learn about possible attributes.
  // Hover to view descriptions of existing attributes.
  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
  "version": "0.2.0",
  "configurations": [
    {
      "type": "chrome",
      "request": "launch",
      // "runtimeExecutable": "/snap/bin/chromium",
      // "runtimeExecutable": "/usr/bin/chromium-browser",
      "name": "Launch Chrome against localhost",
      "url": "http://localhost:4000",
      "webRoot": "${workspaceFolder}"
    }
  ]
}

VS Code version: Code 1.77.0 (7f329fe, 2023-03-29T10:05:35.165Z)
OS version: Linux x64 5.15.0-1032-oracle snap
Modes:
Sandboxed: No

System Info

Item	Value
CPUs	AMD Ryzen 9 3950X 16-Core Processor (32 x 2200)
GPU Status	2d_canvas: unavailable_software canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: disabled_software multiple_raster_threads: enabled_on opengl: disabled_off rasterization: disabled_software raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: disabled_software video_encode: disabled_software vulkan: disabled_off webgl: unavailable_software webgl2: unavailable_software webgpu: disabled_off
Load (avg)	1, 1, 1
Memory (System)	62.75GB (41.85GB free)
Process Argv	--no-sandbox --force-user-env --unity-launch --crash-reporter-id ddb2080e-9c23-4a55-b858-e42c8bf57998
Screen Reader	no
VM	0%
DESKTOP_SESSION	ubuntu
XDG_CURRENT_DESKTOP	Unity
XDG_SESSION_DESKTOP	ubuntu
XDG_SESSION_TYPE	wayland

Extensions (24)

Extension	Author (truncated)	Version
markdown-mermaid	bie	1.18.0
vscode-eslint	dba	2.4.0
gitlens	eam	13.4.0
vscode-npm-script	eg2	0.3.29
prettier-vscode	esb	9.10.4
copilot	Git	1.78.9758
vscode-pull-request-github	Git	0.62.0
terraform	has	2.25.4
vscode-peacock	joh	4.2.2
rainbow-csv	mec	3.6.0
vscode-scss	mrm	0.10.0
playwright	ms-	1.0.9
isort	ms-	2022.8.0
python	ms-	2023.6.0
vscode-pylance	ms-	2023.3.40
jupyter	ms-	2023.3.1000892223
jupyter-keymap	ms-	1.1.0
jupyter-renderers	ms-	1.0.15
vscode-jupyter-cell-tags	ms-	0.1.8
vscode-jupyter-slideshow	ms-	0.1.5
vsliveshare	ms-	1.0.5834
react-proptypes-intellisense	OfH	1.0.3
vscode-stylelint	sty	1.2.4
markdown-all-in-one	yzh	3.5.1

A/B Experiments

vsliv368cf:30146710
vsreu685:30147344
python383cf:30185419
vspor879:30202332
vspor708:30202333
vspor363:30204092
vslsvsres303:30308271
vserr242:30382549
pythontb:30283811
vsjup518:30340749
pythonptprofiler:30281270
vshan820:30294714
vstes263:30335439
vscoreces:30445986
pythondataviewer:30285071
vscod805cf:30301675
binariesv615:30325510
bridge0708:30335490
bridge0723:30353136
cmake_vspar411:30581797
vsaa593:30376534
pythonvs932:30410667
cppdebug:30492333
vsclangdf:30486550
c4g48928:30535728
dsvsc012cf:30540253
pynewext54:30695312
azure-dev_surveyone:30548225
vscccc:30610679
nodejswelcome1:30587005
3biah626:30602489
pyind779:30671433
89544117:30613380
pythonsymbol12:30671437
showlangstatbar:30672706
pythonb192cf:30669361
azdwalk:30687957
pythonms35:30701012

[mofojed]

I've dug into the developer logs, and I see this when I try to launch:

==> sharedprocess.log <==
2023-03-31 20:06:40.144 [error] [uncaught exception in sharedProcess]: Cannot read properties of undefined (reading 'then'): TypeError: Cannot read properties of undefined (reading 'then')
    at h.s (/snap/code/123/usr/share/code/resources/app/out/vs/code/node/sharedProcess/sharedProcessMain.js:23:5588)
    at h.q (/snap/code/123/usr/share/code/resources/app/out/vs/code/node/sharedProcess/sharedProcessMain.js:23:4988)
    at /snap/code/123/usr/share/code/resources/app/out/vs/code/node/sharedProcess/sharedProcessMain.js:23:4377
    at E.invoke (/snap/code/123/usr/share/code/resources/app/out/vs/code/node/sharedProcess/sharedProcessMain.js:19:145)
    at u.deliver (/snap/code/123/usr/share/code/resources/app/out/vs/code/node/sharedProcess/sharedProcessMain.js:19:2121)
    at l.fire (/snap/code/123/usr/share/code/resources/app/out/vs/code/node/sharedProcess/sharedProcessMain.js:19:1729)
    at MessagePortMain.B (/snap/code/123/usr/share/code/resources/app/out/vs/code/node/sharedProcess/sharedProcessMain.js:17:23772)
    at MessagePortMain.emit (node:events:526:28)
    at MessagePortMain._internalPort.emit (node:electron/js2c/utility_init:5:364)

[connor4312]

Duplicates microsoft/vscode-js-debug#1628 (comment)

[mofojed]

I was still having problems in v1.77.3, turns out I had VSCode installed through snap. I tried installing with the .deb package and that seems to have fixed the issue: https://code.visualstudio.com/docs/setup/linux