Add test for rustdoc new check pass

rust-lang · Feb 27, 2021 · 25e030b · 25e030b
1 parent 9f1abe8
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diff --git a/src/test/rustdoc-ui/rustc-check-passes.rs 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
@@ -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`.