Suppress clippy divergence warning

Author: compiler-errors

tracing-attributes/src/expand.rs

@@ -58,7 +58,7 @@ pub(crate) fn gen_function<'a, B: ToTokens + 'a>(
         // The `#[allow(unreachable_code)]` is given because the return
         // statement is unreachable, but does affect inference.
         let fake_return_edge = quote_spanned! {return_type.span()=>
-            #[allow(unreachable_code)]
+            #[allow(unreachable_code, clippy::diverging_sub_expression)]
             if false {
                 let __tracing_attr_fake_return: #return_type =
                     unreachable!("this is just for type inference, and is unreachable code");