1 files changed, 11 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-3026.rs b/tests/ui/issues/issue-3026.rs
new file mode 100644
index 00000000000..4619a3fe787
--- /dev/null
+++ b/tests/ui/issues/issue-3026.rs
@@ -0,0 +1,11 @@
+// run-pass
+// pretty-expanded FIXME #23616
+
+use std::collections::HashMap;
+
+pub fn main() {
+    let x: Box<_>;
+    let mut buggy_map: HashMap<usize, &usize> = HashMap::new();
+    x = Box::new(1);
+    buggy_map.insert(42, &*x);
+}