1 files changed, 36 insertions, 0 deletions
diff --git a/tests/ui/borrowck/issue-62387-suggest-iter-mut-2.rs b/tests/ui/borrowck/issue-62387-suggest-iter-mut-2.rs
new file mode 100644
index 000000000..2d0b837a9
--- /dev/null
+++ b/tests/ui/borrowck/issue-62387-suggest-iter-mut-2.rs
@@ -0,0 +1,36 @@
+// run-rustfix
+#![allow(unused_mut)]
+#![allow(dead_code)]
+use std::path::PathBuf;
+
+#[derive(Clone)]
+struct Container {
+    things: Vec<PathBuf>,
+}
+
+impl Container {
+    fn things(&mut self) -> &[PathBuf] {
+        &self.things
+    }
+}
+
+// contains containers
+struct ContainerContainer {
+    contained: Vec<Container>,
+}
+
+impl ContainerContainer {
+    fn contained(&self) -> &[Container] {
+        &self.contained
+    }
+
+    fn all_the_things(&mut self) -> &[PathBuf] {
+        let mut vec = self.contained.clone();
+        let _a =
+            vec.iter().flat_map(|container| container.things()).cloned().collect::<Vec<PathBuf>>();
+        //~^ ERROR cannot borrow `*container` as mutable, as it is behind a `&` reference
+        unimplemented!();
+    }
+}
+
+fn main() {}