rust-analyzer: Possible crash in `rust-project.json` project after #14111

rust-analyzer version: (eg. output of “rust-analyzer: Show RA Version” command, accessible in VSCode via <kbd>Ctrl/⌘</kbd>+<kbd>Shift</kbd>+<kbd>P</kbd>)

❯ rust-analyzer --version
rust-analyzer 0.0.0 (f1b257f4e 2023-01-27)

Installed from the latest commit 3bc33c7e9f041c5aef69a5c33b3d29d19a341ece in master.

rustc version: (eg. output of rustc -V)

rustc 1.67.0 (fc594f156 2023-01-24)

relevant settings: (eg. client settings, or environment variables like CARGO, RUSTC, RUSTUP_HOME or CARGO_HOME)

When opening projects in Emacs using lsp-mode and rust-analyzer, the server starts up, I can see flycheck diagnostics, but after a few seconds I get

Server rust-analyzer:6427 exited (check corresponding stderr buffer for details). Do you want to restart it? (y or n)

The *Messages* buffer shows:

LSP :: Connected to [rust-analyzer:7609/starting REDACTED].
LSP :: rust-analyzer:7609 initialized successfully in folders: (REDACTED)
LSP :: rust-analyzer has exited (abort trap: 6)
user-error: Beginning of history; no preceding item [2 times]
Server rust-analyzer:7609 exited (check corresponding stderr buffer for details). Do you want to restart it? (y or n) n
Invalid preview key: [67108910]

*rust-analyzer::stderr* shows:

Error: Custom { kind: InvalidData, error: Error("unknown variant `ApiVersionCheck`, expected `ListMacros` or `ExpandMacro`", line: 1, column: 18) }

Process rust-analyzer stderr finished

The server IO log buffer has a bunch of:

[Trace - 06:08:54 PM] Received response 'nil - (17)' in 0ms.
Result: {
  "code": -32800,
  "message": "canceled by client"
}

Context

I did several things to try to figure out what was causing this and found:

• This crash only happens with projects internal to my company. If I pull the rust-analyzer repo or any other public Rust repo, everything works without issue. My company uses a custom build tool, so this made me wonder if it was something related to that. However…
• I opened the same internal projects using VS Code and RA and everything worked without issue.
• I opened the internal projects in Helix with RA and RA crashed.

This has been happening since the beginning of the week (probably Monday).

Also, the log

Error: Custom { kind: InvalidData, error: Error("unknown variant `ApiVersionCheck`, expected `ListMacros` or `ExpandMacro`", line: 1, column: 18) }

only appeared today. Since Monday, the *rust-analyzer::stderr* buffer previously showed:

Process rust-analyzer stderr finished

and no other information.