proc macro errors are attached to the wrong location in diagnostics.

[jhgg]

I'm using tokio::main from the tokio 1.19 crate as an example here, but this seems to occur with any proc macro:

Consider the following code where "heck" produces a proc macro error:

#[tokio::main(heck)]
async fn main() {}

fn world() {
    println!("hello");
    println!("hello");
    println!("hello");
    println!("hello");
    println!("hello");
    println!("hello");
    println!("hello");
    println!("hello");
    println!("hello");
}

The diagnostics is attached to a seemingly random line:

rust-analyzer version: 0.0.0 (b0102bd 2022-06-28)
rustc 1.63.0-nightly (12cd71f4d 2022-06-01)

[jhgg]

I bisected this to #12629 cc @flodiebold