proc-macro panicked: ParseFloatError { kind: Invalid }

[lvella]

I think I stumbled upon a rust-analyzer bug. Upon trying to make YouCompleteMe work with latest nightly of rust-analyzer, it panicked with the following error message:

proc macro returned error: proc-macro panicked: called Result::unwrap() on an Err value: ParseFloatError { kind: Invalid }

But "cargo build" succeeded using the same nightly toolchain. The code that fails is this one (very small, just one file): https://github.com/lvella/bastroblasto

The offending version: rust-analyzer 3022a2c 2021-05-28 dev

[lnicola]

Duplicate of #8928. As a workaround you can use the stable toolchain or disable proc macro support.