From 328447279d8247dcf3341fb1ed58fc39ba871ae3 Mon Sep 17 00:00:00 2001
From: Yuki Okushi <huyuumi.dev@gmail.com>
Date: Fri, 26 Jul 2019 17:39:58 +0900
Subject: [PATCH] Add test for issue-54062

---
 src/test/ui/issues/issue-54062.rs     | 13 +++++++++++++
 src/test/ui/issues/issue-54062.stderr | 16 ++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 src/test/ui/issues/issue-54062.rs
 create mode 100644 src/test/ui/issues/issue-54062.stderr

diff --git a/src/test/ui/issues/issue-54062.rs b/src/test/ui/issues/issue-54062.rs
new file mode 100644
index 0000000000000..495b7343f2034
--- /dev/null
+++ b/src/test/ui/issues/issue-54062.rs
@@ -0,0 +1,13 @@
+use std::sync::Mutex;
+
+struct Test {
+    comps: Mutex<String>,
+}
+
+fn main() {}
+
+fn testing(test: Test) {
+    let _ = test.comps.inner.lock().unwrap();
+    //~^ ERROR: field `inner` of struct `std::sync::Mutex` is private
+    //~| ERROR: no method named `unwrap` found
+}
diff --git a/src/test/ui/issues/issue-54062.stderr b/src/test/ui/issues/issue-54062.stderr
new file mode 100644
index 0000000000000..082ac91edb1c4
--- /dev/null
+++ b/src/test/ui/issues/issue-54062.stderr
@@ -0,0 +1,16 @@
+error[E0616]: field `inner` of struct `std::sync::Mutex` is private
+  --> $DIR/issue-54062.rs:10:13
+   |
+LL |     let _ = test.comps.inner.lock().unwrap();
+   |             ^^^^^^^^^^^^^^^^
+
+error[E0599]: no method named `unwrap` found for type `std::sys_common::mutex::MutexGuard<'_>` in the current scope
+  --> $DIR/issue-54062.rs:10:37
+   |
+LL |     let _ = test.comps.inner.lock().unwrap();
+   |                                     ^^^^^^
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0599, E0616.
+For more information about an error, try `rustc --explain E0599`.