From 7b84b62d290f9776f8ee8d327b38398a27f923f9 Mon Sep 17 00:00:00 2001
From: Jesus Rubio <jesusprubio@gmail.com>
Date: Tue, 9 Feb 2021 14:09:19 +0100
Subject: [PATCH] Lost text re-added

---
 compiler/rustc_error_codes/src/error_codes/E0547.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/compiler/rustc_error_codes/src/error_codes/E0547.md b/compiler/rustc_error_codes/src/error_codes/E0547.md
index 7a719850040..ca14f3865e1 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0547.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0547.md
@@ -1,6 +1,14 @@
+The `issue` value is missing in a stability attribute.
+
+Erroneous code example:
+
+```compile_fail,E0547
+#![feature(staged_api)]
 #![stable(since = "1.0.0", feature = "test")]
+
 #[unstable(feature = "_unstable_fn")] // invalid
 fn _unstable_fn() {}
+
 #[rustc_const_unstable(feature = "_unstable_const_fn")] // invalid
 fn _unstable_const_fn() {}
 ```
@@ -10,8 +18,10 @@ To fix the issue you need to provide the `issue` field.
 ```
 #![feature(staged_api)]
 #![stable(since = "1.0.0", feature = "test")]
+
 #[unstable(feature = "_unstable_fn", issue = "none")] // ok!
 fn _unstable_fn() {}
+
 #[rustc_const_unstable(
     feature = "_unstable_const_fn",
     issue = "none"