Ban pyo3(get, set) on tuple struct field

pyo3-macros-backend/src/pyclass.rs

@@ -506,7 +506,7 @@ fn impl_descriptors(
         .flat_map(|(field, fns)| {
             fns.iter()
                 .map(|desc| {
-                    let name = field.ident.as_ref().unwrap().unraw();
+                    if let Some(name) = field.ident.as_ref().map(|ident| ident.unraw()) {
                         let doc = utils::get_doc(&field.attrs, None, true)
                             .unwrap_or_else(|_| syn::LitStr::new(&name.to_string(), name.span()));
                         let property_type = PropertyType::Descriptor(&field);
@@ -519,6 +519,9 @@ fn impl_descriptors(
                             }
                             _ => unreachable!(),
                         }
+                    } else {
+                        bail_spanned!(field.span() => "get/set are not supported on tuple struct field");
+                    }
                 })
                 .collect::<Vec<syn::Result<TokenStream>>>()
         })

tests/ui/invalid_property_args.rs

@@ -24,4 +24,7 @@ impl ClassWithSetter {
     fn setter_with_too_many_args(&mut self, py: Python, foo: u32, bar: u32) {}
 }
 
+#[pyclass]
+struct TupleGetterSetter(#[pyo3(get, set)] i32);
+
 fn main() {}

tests/ui/invalid_property_args.stderr

@@ -15,3 +15,9 @@ error: setter function can have at most two arguments ([pyo3::Python,] and value
    |
 24 |     fn setter_with_too_many_args(&mut self, py: Python, foo: u32, bar: u32) {}
    |                                                                        ^^^
+
+error: get/set are not supported on tuple struct field
+  --> $DIR/invalid_property_args.rs:28:44
+   |
+28 | struct TupleGetterSetter(#[pyo3(get, set)] i32);
+   |                                            ^^^