This just started happening recently. After I use the integrated VSCode repl for a while, it increasingly hangs with this error: “The connection to the terminal’s pty host process is unresponsive, the terminals may stop working.” It recovers, but it takes longer and longer to recover until I have …

Do you have a firewall running that might block the communication to the REPL? Does it also happen if you use the normal VSCode terminal and launch Julia from the terminal?

I just noticed this today too. I am still using Windows 10.

I’ve been using VSCodium and VSCode since at least January 2022, and noticed this too on both versions with the latest upgrade to VSCode (I think it was called the July update). As a result, I ran my usual work today through the REPL - no problems there. It wasn’t a problem with either VSCodium or…

Can you try downgrading the extension version to 1.6.28 or 1.6.29, just to confirm that this was caused by us and not the VS Code update?

I switched to Julia extension 1.6.28 and in my initial tests of the REPL, everything seems to be working normally (no hanging or errors). I’ll keep using 1.6.28 to see if I encounter any issues - unfortunately I don’t use Julia all day, but I should have a couple of chances to try it live by the end…

Ok, one more data point would be to try disabling the shell integration (terminal.integrated.shellIntegration.enabled) on the latest release of the extension.

For what its worth, I also had a lag issue that sometimes got so bad it froze vscode (Windows, Julia extension v1.6.30). I downgraded to v1.6.29, and it seems to be better now. Will post back if the problem persists. I am running Julia v.1.8.0-rc4.

OK, switched back to Julia extension v1.6.30 and on initial tests everything seems to be working great. I’ll leave this as-is when I use Julia over the next couple of days and will report back. Thanks!

Thanks for the help here. As for firewall, wouldn’t that cause it to never work as opposed to just gradually stop working over time? (and possibly related to how much was displayed in REPL as when much text is dumped there is when it seems to start having issues). Does it also happen if you use th…

I am facing the same issue.Could somebody show how the disabling can be done? Thank in advance.

VSCode REPL hanging after a while

General Usage

pfitzseb August 11, 2022, 3:29pm 11

Disabling terminal.integrated.shellIntegration.enabled should fix this in the short-term.

VSCode REPL randomly loses connection

Suddenly REPL in vscode becomes weird

Topic		Replies	Views
"The connection to the terminal's pty host process is unresponsive, the terminals may stop working." VS Code repl , error , vscode , crash	1	8803	August 14, 2022
VSCode REPL randomly loses connection Tooling vscode	1	510	August 13, 2022
Repl immediately crashes in VSCode VS Code	6	522	June 9, 2023
Julia vscode lose connection to REPL after a while General Usage vscode	4	182	May 19, 2025
VSCode extension: REPL crashes with Julia 1.5-rc2 VS Code	0	399	July 30, 2020

VSCode REPL hanging after a while

Related topics