1 files changed, 14 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-40510-3.rs b/tests/ui/issues/issue-40510-3.rs
new file mode 100644
index 000000000..181263adc
--- /dev/null
+++ b/tests/ui/issues/issue-40510-3.rs
@@ -0,0 +1,14 @@
+#![allow(unused)]
+
+fn f() {
+    let mut x: Vec<()> = Vec::new();
+
+    || {
+        || {
+            x.push(())
+        }
+        //~^^^ ERROR captured variable cannot escape `FnMut` closure body
+    };
+}
+
+fn main() {}