From 08fbe3dafa24429d17009bd5ee475e10a53be9b6 Mon Sep 17 00:00:00 2001
From: Jacob Pratt <jacob@jhpratt.dev>
Date: Mon, 14 Mar 2022 22:01:06 -0400
Subject: [PATCH 1/2] Include tracking issue in diagnostic

---
 compiler/rustc_attr/src/builtin.rs                             | 3 +--
 .../ui/deprecation/feature-gate-deprecated_suggestion.stderr   | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/compiler/rustc_attr/src/builtin.rs b/compiler/rustc_attr/src/builtin.rs
index 613320087d2..ffad7dcf557 100644
--- a/compiler/rustc_attr/src/builtin.rs
+++ b/compiler/rustc_attr/src/builtin.rs
@@ -750,8 +750,7 @@ where
                                     if sess.is_nightly_build() {
                                         diag.help("add `#![feature(deprecated_suggestion)]` to the crate root");
                                     }
-                                    // FIXME(jhpratt) change this to an actual tracking issue
-                                    diag.note("see #XXX for more details").emit();
+                                    diag.note("see #94785 for more details").emit();
                                 }
 
                                 if !get(mi, &mut suggestion) {
diff --git a/src/test/ui/deprecation/feature-gate-deprecated_suggestion.stderr b/src/test/ui/deprecation/feature-gate-deprecated_suggestion.stderr
index 3b995fed75c..438ce3349d2 100644
--- a/src/test/ui/deprecation/feature-gate-deprecated_suggestion.stderr
+++ b/src/test/ui/deprecation/feature-gate-deprecated_suggestion.stderr
@@ -5,7 +5,7 @@ LL | #[deprecated(suggestion = "foo")]
    |              ^^^^^^^^^^^^^^^^^^
    |
    = help: add `#![feature(deprecated_suggestion)]` to the crate root
-   = note: see #XXX for more details
+   = note: see #94785 for more details
 
 error: aborting due to previous error
 

From 06a1fc98eb93ca7062b11ec45053db990a4c127f Mon Sep 17 00:00:00 2001
From: Jacob Pratt <jacob@jhpratt.dev>
Date: Mon, 14 Mar 2022 22:05:30 -0400
Subject: [PATCH 2/2] Correct meta item diagnostic

---
 compiler/rustc_attr/src/builtin.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/compiler/rustc_attr/src/builtin.rs b/compiler/rustc_attr/src/builtin.rs
index ffad7dcf557..e1eb014738f 100644
--- a/compiler/rustc_attr/src/builtin.rs
+++ b/compiler/rustc_attr/src/builtin.rs
@@ -763,10 +763,10 @@ where
                                     meta.span(),
                                     AttrError::UnknownMetaItem(
                                         pprust::path_to_string(&mi.path),
-                                        if attr.has_name(sym::deprecated) {
-                                            &["since", "note"]
-                                        } else {
+                                        if sess.features_untracked().deprecated_suggestion {
                                             &["since", "note", "suggestion"]
+                                        } else {
+                                            &["since", "note"]
                                         },
                                     ),
                                 );