Autocomplete not working when line is not terminated with semicolon in macro annotated method

[DGolubets]

rust-analyzer version: rust-analyzer 1.90.0 (1159e78 2025-09-14)

rustc version: rustc 1.90.0 (1159e78c4 2025-09-14)

editor or extension: Zed 0.205.5

code snippet to reproduce:

#[faux::create]
struct S {
    a: i32,
}

#[faux::methods]
impl S {
    fn do_work(&mut self) {
        let s = "abcd";
        //let n = s.len();
        self.a = 0;
    }
}

When typing the commented line, I don't get a suggestion for len method or any other methods.
If I put semicolon in the end in advance, then it starts working.
Also if I remove macros annotations then it starts working as expected too.

[lnicola]

It seems to work for me, but I have to manually trigger the completions:

They don't show up after s. because the macro fails to expand and for some reason we don't handle it.

[ChayimFriedman2]

Having to manually trigger completion is a sign that completion takes more than the time VSCode allocates it to open without keypress.

Our fixup infra should make the macro compile, but it's very incomplete. Yet, OP you can make the macro more resilient if when there is an error in the input (syn fails to parse), it will return its input besides the compile_error!.

[lnicola]

Eh, I'm not sure. I don't get completions in Zed either, and s. doesn't work even if I hit Ctrl-Space, so maybe we're still not handling it in fixup.

[DGolubets]

Our fixup infra should make the macro compile, but it's very incomplete. Yet, OP you can make the macro more resilient if when there is an error in the input (syn fails to parse), it will return its input besides the compile_error!.

I'm not the macro's author.
I can submit a ticket in that library if you think that's something to fix there.
Though I observed the same issue with different type of macro, e.g. async_trait.