1 files changed, 6 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-51154.rs b/tests/ui/issues/issue-51154.rs
new file mode 100644
index 00000000000..12903f79010
--- /dev/null
+++ b/tests/ui/issues/issue-51154.rs
@@ -0,0 +1,6 @@
+fn foo<F: FnMut()>() {
+    let _: Box<F> = Box::new(|| ());
+    //~^ ERROR mismatched types
+}
+
+fn main() {}