From 6d1100fa79e5dcd35a5af387e05135e2c716c032 Mon Sep 17 00:00:00 2001
From: Alik Aslanyan <inline0@protonmail.com>
Date: Wed, 22 Dec 2021 02:03:51 +0400
Subject: [PATCH] Add failing test

---
 .../auxiliary/hidden-child.rs                  |  8 ++++++++
 .../auxiliary/hidden-parent.rs                 |  8 ++++++++
 .../hidden-child.rs                            | 10 ++++++++++
 .../hidden-child.stderr                        | 18 ++++++++++++++++++
 .../hidden-parent.rs                           |  7 +++++++
 .../hidden-parent.stderr                       | 18 ++++++++++++++++++
 6 files changed, 69 insertions(+)
 create mode 100644 src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/auxiliary/hidden-child.rs
 create mode 100644 src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/auxiliary/hidden-parent.rs
 create mode 100644 src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-child.rs
 create mode 100644 src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-child.stderr
 create mode 100644 src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-parent.rs
 create mode 100644 src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-parent.stderr

diff --git a/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/auxiliary/hidden-child.rs b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/auxiliary/hidden-child.rs
new file mode 100644
index 00000000000..15e0af1de64
--- /dev/null
+++ b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/auxiliary/hidden-child.rs
@@ -0,0 +1,8 @@
+#![crate_type = "lib"]
+
+extern crate core;
+
+pub mod __private {
+    #[doc(hidden)]
+    pub use core::option::Option::{self, None, Some};
+}
diff --git a/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/auxiliary/hidden-parent.rs b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/auxiliary/hidden-parent.rs
new file mode 100644
index 00000000000..5a5079d8204
--- /dev/null
+++ b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/auxiliary/hidden-parent.rs
@@ -0,0 +1,8 @@
+#![crate_type = "lib"]
+
+extern crate core;
+
+#[doc(hidden)]
+pub mod __private {
+    pub use core::option::Option::{self, None, Some};
+}
diff --git a/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-child.rs b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-child.rs
new file mode 100644
index 00000000000..38dabc9d71f
--- /dev/null
+++ b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-child.rs
@@ -0,0 +1,10 @@
+// aux-build:hidden-child.rs
+
+// FIXME(compiler-errors): This currently suggests the wrong thing.
+// UI test exists to track the problem.
+
+extern crate hidden_child;
+
+fn main() {
+    let x: Option<i32> = 1i32; //~ ERROR mismatched types
+}
diff --git a/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-child.stderr b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-child.stderr
new file mode 100644
index 00000000000..67f4ac08de2
--- /dev/null
+++ b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-child.stderr
@@ -0,0 +1,18 @@
+error[E0308]: mismatched types
+  --> $DIR/hidden-child.rs:9:26
+   |
+LL |     let x: Option<i32> = 1i32;
+   |            -----------   ^^^^ expected enum `Option`, found `i32`
+   |            |
+   |            expected due to this
+   |
+   = note: expected enum `Option<i32>`
+              found type `i32`
+help: try wrapping the expression in `hidden_child::__private::Some`
+   |
+LL |     let x: Option<i32> = hidden_child::__private::Some(1i32);
+   |                          ++++++++++++++++++++++++++++++    +
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.
diff --git a/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-parent.rs b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-parent.rs
new file mode 100644
index 00000000000..4d96d6c16cb
--- /dev/null
+++ b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-parent.rs
@@ -0,0 +1,7 @@
+// aux-build:hidden-parent.rs
+
+extern crate hidden_parent;
+
+fn main() {
+    let x: Option<i32> = 1i32; //~ ERROR mismatched types
+}
diff --git a/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-parent.stderr b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-parent.stderr
new file mode 100644
index 00000000000..ee84cf40110
--- /dev/null
+++ b/src/test/ui/suggestions/dont-suggest-doc-hidden-variant-for-enum/hidden-parent.stderr
@@ -0,0 +1,18 @@
+error[E0308]: mismatched types
+  --> $DIR/hidden-parent.rs:6:26
+   |
+LL |     let x: Option<i32> = 1i32;
+   |            -----------   ^^^^ expected enum `Option`, found `i32`
+   |            |
+   |            expected due to this
+   |
+   = note: expected enum `Option<i32>`
+              found type `i32`
+help: try wrapping the expression in `hidden_parent::__private::Some`
+   |
+LL |     let x: Option<i32> = hidden_parent::__private::Some(1i32);
+   |                          +++++++++++++++++++++++++++++++    +
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.