[Debug] Cannot launch multiple programs in integrated terminal

[testforstephen]

• VSCode Version: 1.19.1
• OS Version: Windows 10

Steps to Reproduce:

1. Install java-debug extension
2. Use vscode to open java project, add two launch configurations on launch.json, and both configurations' console setting is integratedTerminal.
3. Launch the first one, and you see Java Debug Console channel added to integrated terminal.
4. Try to launch the second one, timeout. No new terminal channel is created.

See the gif below. The two launchInTerminal commands are sent to the same shell terminal, but the first debug session is still running so that the second one is pending. You see if i stop the first one, the second the runInTerminal commands shows up immediately at the same terminal.

Expected behavior:

• Users should be able to launch multiple programs in integrated terminal
• Each program should have its own terminal created

[isidorn]

@testforstephen Here's a code pointer in case you are interested in providing a PR that solves this issue
https://github.com/Microsoft/vscode/blob/master/src/vs/workbench/parts/debug/electron-browser/terminalSupport.ts#L21

Forwarding to @weinand feel free to bounce back to me if you would like me to investigate

[weinand]

duplicate of #37589