Lifetime elision error not displayed

[branpk]

fn foo(a: &i32, b: &i32) -> &i32 {}

fn main() {}

rust-analyzer shows no inline errors for the above code. Manually running cargo check works correctly:

error[E0106]: missing lifetime specifier                                                 
 --> src\main.rs:1:29
  |
1 | fn foo(a: &i32, b: &i32) -> &i32 {}
  |           ----     ----     ^ expected named lifetime parameter
  |
  = help: this function's return type contains a borrowed value, but the signature does not say whether it is borrowed from `a` or `b`
help: consider introducing a named lifetime parameter
  |
1 | fn foo<'a>(a: &'a i32, b: &'a i32) -> &'a i32 {}
  |       ^^^^    ^^^^^^^     ^^^^^^^     ^^^

but rust-analyzer shows no inline error message.

Other check-on-save errors are shown correctly, so I don't think it's an issue with my setup.

Windows 10, VS Code, Rust 1.50.0 nightly, rust-analyzer v0.2.424

[jonas-schievink]

Please try with a nightly build of r-a

[branpk]

Thanks!

[owtotwo]

I have the same thing.

The reason I speculate is something wrong in cargo's build cache. (Refer: rust-lang/cargo#9971)

Clicking Run button on fn main() {} to force rebuild, and the lifetime error will show correctly temporarily.

But it will be hidden again when the next Check-on-Save.

Development Environment:

• Windows 10 19044.1889
• Visual Studio Code 1.70.2
• rustc 1.63.0 (4b91a6ea7 2022-08-08)
• rust-analyzer version: 0.3.1178-standalone (a670ff8 2022-08-21)
• And rust-analyzer version: 0.4.1179-standalone (6711ded 2022-08-22)