gopls version: master (242e5ed)

VSCode settings:

{
  "gopls": {
    "ui.completion.usePlaceholders": true,
    // ...
  }
}

Steps to reproduce:

1. Enable gopls.ui.completion.usePlaceholders.
2. Create a .go file without any imports.
3. Try to complete a function call from some package (for example, log.Printf) - the completion response has placeholder but not their names.
4. Try to complete the same function call (now with imported package) - the completion response has correct placeholders.

Note: older versions of gopls didn't provide placeholders at all for cases when the package import was missing. Example: