1 files changed, 13 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-56237.rs b/tests/ui/issues/issue-56237.rs
new file mode 100644
index 000000000..534b85ace
--- /dev/null
+++ b/tests/ui/issues/issue-56237.rs
@@ -0,0 +1,13 @@
+// run-pass
+
+use std::ops::Deref;
+
+fn foo<P>(_value: <P as Deref>::Target)
+where
+    P: Deref,
+    <P as Deref>::Target: Sized,
+{}
+
+fn main() {
+    foo::<Box<u32>>(2);
+}