Autocomplete not available in panic!() and vec![] macros

rust-analyzer version: rust-analyzer version: 0.3.2593-standalone

rustc version: 1.88.0 (6b00bc388 2025-06-23)

editor or extension: VSCode, rust-analyzer 0.3.2593

code snippet to reproduce:

fn main() {
  let s = String::new();
  let v = vec![s.len(), s.len()];
  panic!("{}", s);
}

In this little snippet, when I write out panic!() or vec![] and want to provide it with arguments, the auto-complete in vscode starts failing and doesn't show anything at all, especially when triggered manually via a keyboard shortcut.

I've noticed this issue when I was working with panic! and wrote panic("{}", <cursor>); and triggered auto-complete manually where <cursor> is, and it brought up just text, no symbols or context as it should.

It's worth noting that when I start writing out a symbol that does exist, such as s in this context, then the correct auto-complete does reappear, and it's also worth noting that this isn't an issue with any other macro I've used, I've only observed it with vec![] and panic! and thought I had an error in my code somewhere at first.

Here's a screenshot for more context:

Reproduce the report in VSCode with rust-analyzer 0.3.2593 using the provided Rust snippet. Compare completion triggered in empty arguments to panic!() and vec![] with completion after typing s; done means symbols and relevant context appear in both macro cases.