Debugging hangs after logging some amount of text to the Debug Console

[duckdotapk]

• VSCode Version: 1.47.0
• OS Version: Windows 10 1909

Steps to Reproduce:

Debug this JavaScript code in Node.js:

for(let i = 0; i < 20000; i++)
{
    console.log(i);
}

VSCode should still remain responsive while the loop should seemingly hang somewhere between logging 15,000 and 16,000.

The issue appears to be related to logging some amount of text to the Debug Console.

I also tested this code in 1.46.1 and the issue does not occur in that version.

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

[imagolive]

Same issues running/debugging mocha tests. Just hangs after a lot of output to the debug window.

Only in 1.47 - related to the new javascript debugger perhaps?

[connor4312]

Thanks for the issue. If this is causing problems, you can for the moment use the old debugger by setting debug.javascript.usePreview: false

[connor4312]

Thanks again, this can be fixed by doing one of the following:

1. After 5PM today, using the latest nightly extension (recommended)
2. Setting outputCapture: "std" in your launch.json
3. Setting debug.javascript.usePreview: false to use the old debugger until this lands in a stable release

[duckdotapk]

Yeah, no problem. Glad to see it's resolved!

[talr1]

I've encountered the same issue but only with debugging tests (mocha) for some reason.
happened in latest insiders:

Version: 1.48.0-insider (user setup)
Commit: cb31fc6
Date: 2020-07-15T05:34:49.078Z (1 day ago)
Electron: 8.3.3
Chrome: 80.0.3987.165
Node.js: 12.13.0
V8: 8.0.426.27-electron.0
OS: Windows_NT x64 10.0.18363

and also in latest stable:

Version: 1.47.1 (user setup)
Commit: 485c41f
Date: 2020-07-13T22:42:53.386Z (2 days ago)
Electron: 7.3.2
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Windows_NT x64 10.0.18363

it seems it was enough to set debug.javascript.usePreview: false.
now debugger does not hang