Merge #8426

8426: Track recursion limit when expanding custom derive r=jonas-schievink a=jonas-schievink

You can write a custom derive that expands to itself:

```rust
#[proc_macro_derive(Derive)]
pub fn derive(item: TokenStream) -> TokenStream {
    let mut out: TokenStream = "#[derive(Derive)]".parse().unwrap();

    out.extend(item);
    out
}
```

rustc reports a recursion limit error, but rust-analyzer used to spin in name resolution and eventually fail with "name resolution is stuck". This makes it fail fast by respecting the recursion depth of the invocation.

bors r+

Co-authored-by: Jonas Schievink <[email protected]>

0 files changed, 0 insertions, 0 deletions