Extension activates in empty directories

I was going to try your suggestion of copying files into a new directory until the extension was triggered and found out that it is triggering immediately, even when opening an empty directory. I tried this a couple of different ways (see below) with the same results.

In all test cases I followed these steps:

1. Close the current workspace or folder from the File menu.
2. Close VS Code application.

Then either, Right-click the empty folder and select Open with Code, or,

1. Launch Code form the Start menu.
2. Open the empty directory from File | Open Folder... menu.

Originally posted by @damianpowell in https://github.com/rust-analyzer/rust-analyzer.github.io/issues/204#issuecomment-1564005303

Reproduce the activation behavior using the listed empty-folder workflows in VS Code, first closing the workspace and application as described. No source file or test is identified in the issue, so locate the extension activation entry point and existing activation tests. Done means the extension does not activate when an empty directory is opened, while its intended activation behavior remains covered by tests.