The "path" argument must be of type string. Received type object.

Version: 1.46.0-insider
Commit: 9f89da69154ac6c99dfa7c82986e2df95b7bbe0b
Date: 2020-06-08T22:13:15.761Z
Electron: 7.3.1
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Linux x64 5.3.0-55-generic

Starting up the Java extension I get the following error:

[2020-06-09 10:13:00.576] [exthost] [error] Activating extension redhat.java failed due to an error:
[2020-06-09 10:13:00.576] [exthost] [error] TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type object
	at validateString (internal/validators.js:112:11)
	at Object.join (path.js:1040:7)
	at /home/martin/.vscode-insiders/extensions/redhat.java-0.62.0/dist/extension.js:7:11895
	at new Promise (<anonymous>)
	at /home/martin/.vscode-insiders/extensions/redhat.java-0.62.0/dist/extension.js:7:11865
	at Object.<anonymous> (/home/martin/.vscode-insiders/extensions/redhat.java-0.62.0/dist/extension.js:7:12607)
	at Generator.next (<anonymous>)
	at o (/home/martin/.vscode-insiders/extensions/redhat.java-0.62.0/dist/extension.js:7:10014)

Same as #1449, but different stack trace.

Checking my env, JAVA_HOME is not set

まず、JAVA_HOME を設定していない状態で、記載された VS Code Insiders バージョンにおける Java 拡張機能のアクティベーションを再現し、次に dist/extension.js に示されている path.join の呼び出しを調べます。動作とスタックトレースを issue #1449 と比較します。拡張機能が報告された無効なパス引数エラーなしでアクティベートされれば完了です。