When deleting characters from the name of one element in a tuple, if you delete the last one a panic will occur.

To reproduce, create a new empty project and add this to your main.rs:

fn main() { let (a, b) = (0, 0); }

Then place your cursor right after the 'b' character and press backspace, making your code look like this:

fn main() { let (a, ) = (0, 0); }

This panic message is printed to stderr.

rust-analyzer version: 0.4.1867-standalone (037924c 2024-03-03)
rustc version: rustc 1.78.0-nightly (516b616 2024-03-03)

(sidenote: I know this is the third issue about panics from me in the past 5 days, I apologize if I'm getting annoying)