1 files changed, 17 insertions, 0 deletions
diff --git a/tests/ui/mir/field-projection-mutating-context2.rs b/tests/ui/mir/field-projection-mutating-context2.rs
new file mode 100644
index 000000000..dd9c44a16
--- /dev/null
+++ b/tests/ui/mir/field-projection-mutating-context2.rs
@@ -0,0 +1,17 @@
+use std::sync::Mutex;
+
+static GLOBAL: Mutex<&'static str> = Mutex::new("global str");
+
+struct Foo<T>(T); // `T` is covariant.
+
+fn foo<'a>(mut x: Foo<fn(&'a str)>, string: &'a str) {
+    let Foo(ref mut y): Foo<fn(&'static str)> = x;
+    //~^ ERROR lifetime may not live long enough
+    *y = |s| *GLOBAL.lock().unwrap() = s;
+    (x.0)(&string);
+}
+
+fn main() {
+    foo(Foo(|_| ()), &String::from("i am shortlived"));
+    println!("{}", GLOBAL.lock().unwrap());
+}