From d730cc66460c1cad2f7c5d1951a06666bb8b78de Mon Sep 17 00:00:00 2001
From: Mateusz Gacek <96mateusz.gacek@gmail.com>
Date: Tue, 18 May 2021 15:33:38 +0200
Subject: [PATCH] Add diagnostic item to `CStr`

---
 compiler/rustc_span/src/symbol.rs | 1 +
 library/std/src/ffi/c_str.rs      | 1 +
 2 files changed, 2 insertions(+)

diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
index 03a8f2be156..a5dc6785488 100644
--- a/compiler/rustc_span/src/symbol.rs
+++ b/compiler/rustc_span/src/symbol.rs
@@ -131,6 +131,7 @@ symbols! {
         BinaryHeap,
         Borrow,
         C,
+        CStr,
         CString,
         Center,
         Clone,
diff --git a/library/std/src/ffi/c_str.rs b/library/std/src/ffi/c_str.rs
index 2f9845d7536..302f12af6a0 100644
--- a/library/std/src/ffi/c_str.rs
+++ b/library/std/src/ffi/c_str.rs
@@ -185,6 +185,7 @@ pub struct CString {
 ///
 /// [`&str`]: prim@str
 #[derive(Hash)]
+#[cfg_attr(not(test), rustc_diagnostic_item = "CStr")]
 #[stable(feature = "rust1", since = "1.0.0")]
 // FIXME:
 // `fn from` in `impl From<&CStr> for Box<CStr>` current implementation relies