Development mode crashes the server repeatedly

[phoenixeliot]

When I try to run the server and open an extension debugging window via f5, I get this error repeatedly in the console from extensionHostProcess.js:

rejected promise not handled within 1 second: Error: Channel has been closed

stack trace: Error: Channel has been closed
    at m.validate (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:809:372)
    at m.append (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:808:938)
    at m.append (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:900:249)
    at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:809:937
    at processTicksAndRejections (internal/process/task_queues.js:94:5)

And this message in the testing window:

Is there anything special beyond the instructions in the README.md that I need to do to run this extension in development mode?

This is on VS Code version 1.52.1

[mike-kaufman]

IIRC, to debug the "server", you need to:

1. open one vs code instance on htmlhint (code ./htmlhint), and a second vs code instance in htmlhint-server (code ./htmlhint-server)
2. build & "install" the server: on command-line npm run compile in htmlhint-server directory
3. build the extension: on command-line, npm run compile in htmlhint directory
4. launch a debug instance with the extenion active: from the "htmlhint" vs code instance, launch the "Launch Extension" debug confugration
5. Attach to the the htmlhint-server: From the htmlhint-server vs code instance, launch the "Attach" debug configuration