Failed to cache the CSS classes in the workspace for the first time: Cannot read property 'map' of undefined

[nathonius]

Insiders 1.20.0.
Intellisense for CSS class names 1.16.1
Windows 10

I get this error any time I open VS Code without a workspace. With a folder/workspace, things work as expected:
Failed to cache the CSS classes in the workspace for the first time: Cannot read property 'map' of undefined

I can click for another attempt, but just get the same error again.

[nathonius]

[NoXPhasma]

I get the same error message since version 1.20.0 of VSCode.

[almadsen]

Get same on Mac, since VSCode 1.20.0

Anyone on fixing it?

[Lin-Hongqing]

After updated to 1.20.0,I get this error too.

[jens1o]

Can reproduce this with an empty workspace.

[jkwuc89]

This happens every time I start Visual Studio Code 1.20.

[texjoachim]

Happens here in VSC 1.20.0 on openSUSE Tumbleweed, too.

[Almenon]

same issue

/C:/Program Files (x86)/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:253 [Extension Host] VError: Failed to cache the CSS classes in the workspace for the first time: Cannot read property 'map' of undefined
at C:\Users\Almenon.vscode\extensions\Zignd.html-css-class-completion-1.16.1\out\src\extension.js:158:19
at Generator.throw ()
at rejected (C:\Users\Almenon.vscode\extensions\Zignd.html-css-class-completion-1.16.1\out\src\extension.js:5:65)
at (at C:\Users\Almenon.vscode\extensions\Zignd.html-css-class-completion-1.16.1\out\src\extension.js:159:21)

full log: https://pastebin.com/5KTcTwT0

Windows 10, version 1.20.0 of VSCode

From looking at your code it looks like "BlueBird" is undefined for some reason:

https://github.com/zignd/HTML-CSS-Class-Completion/blob/master/src/extension.ts#L42

[zignd]

There's a bug in the latest version of the API in which calling vscode.workspace.findFiles when the extension is not being executed inside a workspace, causes a "Cannot read property 'map' of undefined" error to be thrown from inside of it.

I will release a new version in a moment. Thanks for the report guys.

@Almenon I thought it was Bluebird initially, but it happened a few lines before this map call.

[jens1o]

@zignd I wonder why you cannot use activationEvents like

 "activationEvents": [
    "onLanguage:css",
    "workspaceContains:**/*.css"
],

[zignd]

@jens1o That's actually a great idea. And there's no particular reason, I think the way it is right now is just what came to mind when I created the extension. I will keep that in mind!

[jens1o]

@zignd May I file a new issue for that?