From 241ceeda046b23651aec95a6bd59cca7aaa69ecc Mon Sep 17 00:00:00 2001
From: "Felix S. Klock II" <pnkfelix@pnkfx.org>
Date: Fri, 21 Jun 2019 12:43:04 +0200
Subject: [PATCH] Added test for deref projection.

---
 .../borrowck/issue-62007-assign-box.rs        | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 src/test/run-pass/borrowck/issue-62007-assign-box.rs

diff --git a/src/test/run-pass/borrowck/issue-62007-assign-box.rs b/src/test/run-pass/borrowck/issue-62007-assign-box.rs
new file mode 100644
index 00000000000..f6fbea821b5
--- /dev/null
+++ b/src/test/run-pass/borrowck/issue-62007-assign-box.rs
@@ -0,0 +1,27 @@
+// run-pass
+
+// Issue #62007: assigning over a deref projection of a box (in this
+// case, `*list = n;`) should be able to kill all borrows of `*list`,
+// so that `*list` can be borrowed on the next iteration through the
+// loop.
+
+#![allow(dead_code)]
+
+struct List<T> {
+    value: T,
+    next: Option<Box<List<T>>>,
+}
+
+fn to_refs<T>(mut list: Box<&mut List<T>>) -> Vec<&mut T> {
+    let mut result = vec![];
+    loop {
+        result.push(&mut list.value);
+        if let Some(n) = list.next.as_mut() {
+            *list = n;
+        } else {
+            return result;
+        }
+    }
+}
+
+fn main() {}