lynaghk / eglot-rust-reproducible-repo

This repo is a reproducible test case for this eglot issue.

Problem

When using a path dependency in Cargo, flymake doesn't update with changes to that dependency.

To reproduce using this repo:

1. Use Emacs with Eglot mode to open consumer/src/main.rs and dep/src/lib.rs.
2. In lib.rs, remove field b from struct Foo.
3. Notice that flymake does not highlight an error in main.rs.
4. In main.rs, run emacs commands eglot-shutdown followed by eglot.
5. Notice that flymake now highlights the expected error, "struct dep::Foo has no field named b"

Visual Studio Code

I suspect the problem is somewhere on the Emacs side rather than the language server (RLS) side, because Visual Studio Code uses the same language server but doesn't suffer from this problem. Specifically, one can add consumer to their VSCode workspace, jump to definition of Foo, remove field b, and then immediately see the error highlighted in consumer/src/main.rs.

Version info

rustc 1.40.0 (73528e339 2019-12-16)
rls 1.40.0 (5db91c7 2019-10-30)
Emacs 26.2
MacOS 10.14.6
eglot 20191230.913
flymake 1.0.8