[plugin][java] Cannot read property 'hasOwnProperty' of undefined

[svor]

While trying Java VS Code as a plugin I can see next problem when vscode-java extension is initializing:

root ERROR [hosted-plugin: 28894] (node:28894) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'hasOwnProperty' of undefined
    at /tmp/vscode-unpacked/redhat.java-0.38.0.vsix/extension/dist/extension.js:1:221949
    at i.workspace.workspaceFolders.i.workspace.workspaceFolders.length.i.workspace.workspaceFolders.forEach.e (/tmp/vscode-unpacked/redhat.java-0.38.0.vsix/extension/dist/extension.js:1:222768)
    at Array.forEach (<anonymous>)
    at Object.l [as excludeProjectSettingsFiles] (/tmp/vscode-unpacked/redhat.java-0.38.0.vsix/extension/dist/extension.js:1:221788)
    at w.onReady.then (/tmp/vscode-unpacked/redhat.java-0.38.0.vsix/extension/dist/extension.js:1:117108)
    at <anonymous>

Steps to reproduce:

1. Exclude java-extension in Theia project;
2. Deploy vscode-java extension by id: vscode:extension/redhat.java

[benoitf]

hello @svor could you say which theia version you're using. master branch ?

[svor]

@benoitf master branch

[tsmaeder]

Looks a bit like theia is not sending multi-workspace folder initialization requests?