1 files changed, 31 insertions, 0 deletions
diff --git a/tests/ui/nll/user-annotations/closure-substs.rs b/tests/ui/nll/user-annotations/closure-substs.rs
new file mode 100644
index 000000000..f7af54e8d
--- /dev/null
+++ b/tests/ui/nll/user-annotations/closure-substs.rs
@@ -0,0 +1,31 @@
+// Test that we enforce user-provided type annotations on closures.
+
+fn foo<'a>() {
+    // Here `x` is free in the closure sig:
+    |x: &'a i32| -> &'static i32 {
+        return x; //~ ERROR lifetime may not live long enough
+    };
+}
+
+fn foo1() {
+    // Here `x` is bound in the closure sig:
+    |x: &i32| -> &'static i32 {
+        return x; //~ ERROR lifetime may not live long enough
+    };
+}
+
+fn bar<'a>() {
+    // Here `x` is free in the closure sig:
+    |x: &'a i32, b: fn(&'static i32)| {
+        b(x); //~ ERROR lifetime may not live long enough
+    };
+}
+
+fn bar1() {
+    // Here `x` is bound in the closure sig:
+    |x: &i32, b: fn(&'static i32)| {
+        b(x); //~ ERROR borrowed data escapes outside of closure
+    };
+}
+
+fn main() {}