From 788261d2d30c92c7423a68088aaee32ce44f9520 Mon Sep 17 00:00:00 2001
From: Yuki Okushi <huyuumi.dev@gmail.com>
Date: Wed, 29 Jul 2020 05:32:28 +0900
Subject: [PATCH] Add regression test for issue-59311

---
 .../ui/higher-rank-trait-bounds/issue-59311.rs   | 16 ++++++++++++++++
 .../higher-rank-trait-bounds/issue-59311.stderr  |  8 ++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 src/test/ui/higher-rank-trait-bounds/issue-59311.rs
 create mode 100644 src/test/ui/higher-rank-trait-bounds/issue-59311.stderr

diff --git a/src/test/ui/higher-rank-trait-bounds/issue-59311.rs b/src/test/ui/higher-rank-trait-bounds/issue-59311.rs
new file mode 100644
index 000000000000..c2168510cf5b
--- /dev/null
+++ b/src/test/ui/higher-rank-trait-bounds/issue-59311.rs
@@ -0,0 +1,16 @@
+// Regression test for #59311. The test is taken from
+// rust-lang/rust/issues/71546#issuecomment-620638437
+// as they seem to have the same cause.
+
+pub trait T {
+    fn t<F: Fn()>(&self, _: F) {}
+}
+
+pub fn crash<V>(v: &V)
+where
+    for<'a> &'a V: T + 'static,
+{
+    v.t(|| {}); //~ ERROR: higher-ranked subtype error
+}
+
+fn main() {}
diff --git a/src/test/ui/higher-rank-trait-bounds/issue-59311.stderr b/src/test/ui/higher-rank-trait-bounds/issue-59311.stderr
new file mode 100644
index 000000000000..e6488c337114
--- /dev/null
+++ b/src/test/ui/higher-rank-trait-bounds/issue-59311.stderr
@@ -0,0 +1,8 @@
+error: higher-ranked subtype error
+  --> $DIR/issue-59311.rs:13:9
+   |
+LL |     v.t(|| {});
+   |         ^^^^^
+
+error: aborting due to previous error
+