6 files changed, 106 insertions, 0 deletions
diff --git a/src/test/ui/suggest-remove-refs-1.rs b/src/test/ui/suggest-remove-refs-1.rs
new file mode 100644
index 00000000000..0f19c48337b
--- /dev/null
+++ b/src/test/ui/suggest-remove-refs-1.rs
@@ -0,0 +1,18 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+    let v = vec![0, 1, 2, 3];
+
+    for (i, n) in &v.iter().enumerate() {
+        //~^ ERROR the trait bound
+        println!("{}", i);
+    }
+}
diff --git a/src/test/ui/suggest-remove-refs-1.stderr b/src/test/ui/suggest-remove-refs-1.stderr
new file mode 100644
index 00000000000..c47b4d283d7
--- /dev/null
+++ b/src/test/ui/suggest-remove-refs-1.stderr
@@ -0,0 +1,15 @@
+error[E0277]: the trait bound `&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>: std::iter::Iterator` is not satisfied
+  --> $DIR/suggest-remove-refs-1.rs:14:19
+   |
+LL |     for (i, n) in &v.iter().enumerate() {
+   |                   -^^^^^^^^^^^^^^^^^^^^
+   |                   |
+   |                   `&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator; maybe try calling `.iter()` or a similar method
+   |                   help: consider removing 1 leading `&`-references
+   |
+   = help: the trait `std::iter::Iterator` is not implemented for `&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>`
+   = note: required by `std::iter::IntoIterator::into_iter`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/suggest-remove-refs-2.rs b/src/test/ui/suggest-remove-refs-2.rs
new file mode 100644
index 00000000000..c427f697ae1
--- /dev/null
+++ b/src/test/ui/suggest-remove-refs-2.rs
@@ -0,0 +1,18 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+    let v = vec![0, 1, 2, 3];
+
+    for (i, n) in & & & & &v.iter().enumerate() {
+        //~^ ERROR the trait bound
+        println!("{}", i);
+    }
+}
diff --git a/src/test/ui/suggest-remove-refs-2.stderr b/src/test/ui/suggest-remove-refs-2.stderr
new file mode 100644
index 00000000000..fdd654ea392
--- /dev/null
+++ b/src/test/ui/suggest-remove-refs-2.stderr
@@ -0,0 +1,15 @@
+error[E0277]: the trait bound `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>: std::iter::Iterator` is not satisfied
+  --> $DIR/suggest-remove-refs-2.rs:14:19
+   |
+LL |     for (i, n) in & & & & &v.iter().enumerate() {
+   |                   ---------^^^^^^^^^^^^^^^^^^^^
+   |                   |
+   |                   `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator; maybe try calling `.iter()` or a similar method
+   |                   help: consider removing 5 leading `&`-references
+   |
+   = help: the trait `std::iter::Iterator` is not implemented for `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>`
+   = note: required by `std::iter::IntoIterator::into_iter`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.
diff --git a/src/test/ui/suggest-remove-refs-3.rs b/src/test/ui/suggest-remove-refs-3.rs
new file mode 100644
index 00000000000..f54ae30caeb
--- /dev/null
+++ b/src/test/ui/suggest-remove-refs-3.rs
@@ -0,0 +1,21 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+    let v = vec![0, 1, 2, 3];
+
+    for (i, n) in & & &
+        & &v
+        .iter()
+        .enumerate() {
+        //~^^^^ ERROR the trait bound
+        println!("{}", i);
+    }
+}
diff --git a/src/test/ui/suggest-remove-refs-3.stderr b/src/test/ui/suggest-remove-refs-3.stderr
new file mode 100644
index 00000000000..b0920a0fa52
--- /dev/null
+++ b/src/test/ui/suggest-remove-refs-3.stderr
@@ -0,0 +1,19 @@
+error[E0277]: the trait bound `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>: std::iter::Iterator` is not satisfied
+  --> $DIR/suggest-remove-refs-3.rs:14:19
+   |
+LL |        for (i, n) in & & &
+   |   ___________________^
+   |  |___________________|
+   | ||
+LL | ||         & &v
+   | ||___________- help: consider removing 5 leading `&`-references
+LL | |          .iter()
+LL | |          .enumerate() {
+   | |_____________________^ `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator; maybe try calling `.iter()` or a similar method
+   |
+   = help: the trait `std::iter::Iterator` is not implemented for `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>`
+   = note: required by `std::iter::IntoIterator::into_iter`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.