X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=tests%2Fui%2Fauxiliary%2Fproc_macro_derive.rs;h=24891682d368d0bfa2f167f88512040928442dab;hb=a1b89f07f00bda6d10e341fda01385f571a243b6;hp=7c4e4a145512f6b268e21bb14eab204ff315de12;hpb=0c1531a5c4269b0d0bc7cff53420f936b42ce1ab;p=rust.git

diff --git a/tests/ui/auxiliary/proc_macro_derive.rs b/tests/ui/auxiliary/proc_macro_derive.rs
index 7c4e4a14551..24891682d36 100644
--- a/tests/ui/auxiliary/proc_macro_derive.rs
+++ b/tests/ui/auxiliary/proc_macro_derive.rs
@@ -4,6 +4,7 @@
 #![crate_type = "proc-macro"]
 #![feature(repr128, proc_macro_quote)]
 #![allow(incomplete_features)]
+#![allow(clippy::field_reassign_with_default)]
 #![allow(clippy::eq_op)]
 
 extern crate proc_macro;
@@ -23,3 +24,20 @@ pub fn derive(_: TokenStream) -> TokenStream {
     };
     output
 }
+
+#[proc_macro_derive(FieldReassignWithDefault)]
+pub fn derive_foo(_input: TokenStream) -> TokenStream {
+    quote! {
+        #[derive(Default)]
+        struct A {
+            pub i: i32,
+            pub j: i64,
+        }
+        #[automatically_derived]
+        fn lint() {
+            let mut a: A = Default::default();
+            a.i = 42;
+            a;
+        }
+    }
+}