From 25e030bc4252bd23e1bed60dfbaca8a0ce7206bb Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Sat, 27 Feb 2021 18:36:15 +0100
Subject: [PATCH] Add test for rustdoc new check pass

---
 src/test/rustdoc-ui/rustc-check-passes.rs     | 4 ++++
 src/test/rustdoc-ui/rustc-check-passes.stderr | 9 +++++++++
 2 files changed, 13 insertions(+)
 create mode 100644 src/test/rustdoc-ui/rustc-check-passes.rs
 create mode 100644 src/test/rustdoc-ui/rustc-check-passes.stderr

diff --git a/src/test/rustdoc-ui/rustc-check-passes.rs b/src/test/rustdoc-ui/rustc-check-passes.rs
new file mode 100644
index 00000000000..731cc8ba617
--- /dev/null
+++ b/src/test/rustdoc-ui/rustc-check-passes.rs
@@ -0,0 +1,4 @@
+#![feature(box_syntax)]
+#![feature(box_syntax)] //~ ERROR
+
+pub fn foo() {}
diff --git a/src/test/rustdoc-ui/rustc-check-passes.stderr b/src/test/rustdoc-ui/rustc-check-passes.stderr
new file mode 100644
index 00000000000..9707895ff3d
--- /dev/null
+++ b/src/test/rustdoc-ui/rustc-check-passes.stderr
@@ -0,0 +1,9 @@
+error[E0636]: the feature `box_syntax` has already been declared
+  --> $DIR/rustc-check-passes.rs:2:12
+   |
+LL | #![feature(box_syntax)]
+   |            ^^^^^^^^^^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0636`.