"received `end` message with no corresponding `begin`" in neovim with LSP

[figurae]

Hi all! I don't even know if this is a rust-analyzer bug, but I keep getting this error when loading or saving any rs file in nvim+LSP after updating rust-analyzer:

("received end message with no corresponding begin")

I'm trying to find out what's wrong, but LSP log is empty. After trying enough times with enough files, a log did appear with some panics ("thread '' panicked at 'range end index 4 out of range for slice of length 0', library\core\src\slice\index.rs:73:5\n"), but I can't reproduce it, so I think this must have been a random panic.

I tried checking at which commit this error appears and ended up with 32b40de as the last error-free version. 21642a2 is the first commit with the error, which is really weird because I can't see anything in that commit that could have had any effect on LSP.

rust-analyzer version: rust-analyzer 0.0.0 (ce36446 2022-06-30)

rustc version: rustc 1.64.0-nightly (ddcbba0 2022-06-29) (also checked with rustc 1.62.0 (a8314ef7d 2022-06-27))

OS: Windows 10 21H2 and up-to-date Manjaro Linux

❯❯ src git:(master) 20:02 rust-analyzer analysis-stats .
Database loaded:     904.14ms (metadata 708.93ms; build 90.25ms)
  crates: 1, mods: 1, decls: 1, fns: 1
Item Collection:     2.81s
  exprs: 12, ??ty: 0 (0%), ?ty: 0 (0%), !ty: 0
Inference:           1.16s
Total:               3.97s

Steps:

1. cargo xtask install --server latest rust-analyzer
2. cargo new project
3. open project with nvim+LSP (minimal init.lua for nvim+Packer: https://pastebin.com/VQNTfLEF), i tried with both nvim 0.7.0 and 0.7.2
4. see error

[Veykril]

Only PR I can think of that might've caused this is #12520
Which would also fit very well with the fact that this happens when loading or saving for you.

[Veykril]

Can you check if #12660 fixes it?

[figurae]

Yup, that fixed it. Thanks!