fix rebase fallout due to rust-lang#69497.

Author: Centril

src/test/ui/macros/trace_faulty_macros.rs

@@ -1,6 +1,6 @@
 // compile-flags: -Z trace-macros
 
-#![recursion_limit="4"]
+#![recursion_limit = "4"]
 
 macro_rules! my_faulty_macro {
     () => {
@@ -24,9 +24,7 @@ macro_rules! my_recursive_macro {
 }
 
 macro_rules! my_macro {
-    () => {
-
-    };
+    () => {};
 }
 
 fn main() {
@@ -39,7 +37,7 @@ fn main() {
 }
 
 #[my_macro]
-fn use_bang_macro_as_attr(){}
+fn use_bang_macro_as_attr() {}
 
-#[derive(Debug)]
-fn use_derive_macro_as_attr(){}
+#[derive(Debug)] //~ ERROR `derive` may only be applied to structs
+fn use_derive_macro_as_attr() {}

src/test/ui/macros/trace_faulty_macros.stderr

@@ -13,7 +13,7 @@ LL |     my_faulty_macro!();
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 note: trace_macro
-  --> $DIR/trace_faulty_macros.rs:33:5
+  --> $DIR/trace_faulty_macros.rs:31:5
    |
 LL |     my_faulty_macro!();
    |     ^^^^^^^^^^^^^^^^^^^
@@ -35,7 +35,7 @@ LL |     my_recursive_macro!();
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 note: trace_macro
-  --> $DIR/trace_faulty_macros.rs:34:5
+  --> $DIR/trace_faulty_macros.rs:32:5
    |
 LL |     my_recursive_macro!();
    |     ^^^^^^^^^^^^^^^^^^^^^^
@@ -60,5 +60,22 @@ LL |     let a = pat_macro!();
    |
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: aborting due to 3 previous errors
+error: `derive` may only be applied to structs, enums and unions
+  --> $DIR/trace_faulty_macros.rs:42:1
+   |
+LL | #[derive(Debug)]
+   | ^^^^^^^^^^^^^^^^
+
+note: trace_macro
+  --> $DIR/trace_faulty_macros.rs:36:13
+   |
+LL |     let a = pat_macro!();
+   |             ^^^^^^^^^^^^
+   |
+   = note: expanding `pat_macro! {  }`
+   = note: to `pat_macro ! (A { a : a, b : 0, c : _, .. }) ;`
+   = note: expanding `pat_macro! { A { a : a, b : 0, c : _, .. } }`
+   = note: to `A { a: a, b: 0, c: _, .. }`
+
+error: aborting due to 4 previous errors