Confusing "this function doesn't have a `self` parameter" hint when using macro

[Patryk27]

Hi,

pub struct Foo;

macro_rules! call_bar {
    () => {
        self.bar();
    }
}

impl Foo {
    pub fn foo(&self) {
        call_bar!();
    }
    
    pub fn bar(&self) {
        
    }
}

... returns:

error[E0424]: expected value, found module `self`
  --> src/lib.rs:5:9
   |
5  |           self.bar();
   |           ^^^^ `self` value is a keyword only available in methods with a `self` parameter
...
10 | /     pub fn foo(&self) {
11 | |         call_bar!();
   | |         ------------ in this macro invocation
12 | |     }
   | |_____- this function doesn't have a `self` parameter

(playground)

Message says this function doesn't have a 'self' parameter, even though it does have a self parameter, which is kinda confusing.

This happens only on beta and nightly, since current stable doesn't provide that hint at all.

Thanks,
Patryk.

[kepexx]

This happened to me on an old nightly (I believe 1.38.0 when it was still nightly, I may be wrong)

[ChosunOne]

Running into this issue on latest stable as well. What is the actual problem?

[Ryan1729]

I just ran into what appears to be the same issue on 1.43.1, in the context of a trait method.