3 files changed, 28 insertions, 0 deletions
diff --git a/library/core/src/iter/traits/iterator.rs b/library/core/src/iter/traits/iterator.rs
index 69f06fb06ef..1cc9133fc3d 100644
--- a/library/core/src/iter/traits/iterator.rs
+++ b/library/core/src/iter/traits/iterator.rs
@@ -41,6 +41,10 @@ fn _assert_is_object_safe(_: &dyn Iterator<Item = ()>) {}
     ),
     on(_Self = "&[]", label = "`{Self}` is not an iterator; try calling `.iter()`"),
     on(
+        _Self = "std::vec::Vec<T, A>",
+        label = "`{Self}` is not an iterator; try calling `.into_iter()` or `.iter()`"
+    ),
+    on(
         _Self = "&str",
         label = "`{Self}` is not an iterator; try calling `.chars()` or `.bytes()`"
     ),
diff --git a/src/test/ui/iterators/vec-on-unimplemented.rs b/src/test/ui/iterators/vec-on-unimplemented.rs
new file mode 100644
index 00000000000..42b5d36bfad
--- /dev/null
+++ b/src/test/ui/iterators/vec-on-unimplemented.rs
@@ -0,0 +1,4 @@
+fn main() {
+    vec![true, false].map(|v| !v).collect::<Vec<_>>();
+    //~^ ERROR `Vec<bool>` is not an iterator
+}
diff --git a/src/test/ui/iterators/vec-on-unimplemented.stderr b/src/test/ui/iterators/vec-on-unimplemented.stderr
new file mode 100644
index 00000000000..afcce5c30ca
--- /dev/null
+++ b/src/test/ui/iterators/vec-on-unimplemented.stderr
@@ -0,0 +1,20 @@
+error[E0599]: `Vec<bool>` is not an iterator
+  --> $DIR/vec-on-unimplemented.rs:2:23
+   |
+LL |     vec![true, false].map(|v| !v).collect::<Vec<_>>();
+   |                       ^^^ `Vec<bool>` is not an iterator; try calling `.into_iter()` or `.iter()`
+   |
+  ::: $SRC_DIR/alloc/src/vec/mod.rs:LL:COL
+   |
+LL | pub struct Vec<T, #[unstable(feature = "allocator_api", issue = "32838")] A: Allocator = Global> {
+   | ------------------------------------------------------------------------------------------------ doesn't satisfy `Vec<bool>: Iterator`
+   |
+   = note: the following trait bounds were not satisfied:
+           `Vec<bool>: Iterator`
+           which is required by `&mut Vec<bool>: Iterator`
+           `[bool]: Iterator`
+           which is required by `&mut [bool]: Iterator`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0599`.