1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-insert-during-each.rs b/src/test/ui/borrowck/borrowck-insert-during-each.rs
new file mode 100644
index 000000000..df967e611
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-insert-during-each.rs
@@ -0,0 +1,26 @@
+use std::collections::HashSet;
+
+struct Foo {
+  n: HashSet<isize>,
+}
+
+impl Foo {
+    pub fn foo<F>(&mut self, mut fun: F) where F: FnMut(&isize) {
+        for f in &self.n {
+            fun(f);
+        }
+    }
+}
+
+fn bar(f: &mut Foo) {
+    f.foo(
+    //~^ ERROR cannot borrow `*f` as mutable
+        |a| { //~ ERROR closure requires unique access to `f`
+            f.n.insert(*a);
+        })
+}
+
+fn main() {
+  let mut f = Foo { n: HashSet::new() };
+  bar(&mut f);
+}