1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/nll/user-annotations/issue-55219.rs b/src/test/ui/nll/user-annotations/issue-55219.rs
new file mode 100644
index 000000000..147413663
--- /dev/null
+++ b/src/test/ui/nll/user-annotations/issue-55219.rs
@@ -0,0 +1,18 @@
+// Regression test for #55219:
+//
+// The `Self::HASH_LEN` here expands to a "self-type" where `T` is not
+// known. This unbound inference variable was causing an ICE.
+//
+// check-pass
+
+pub struct Foo<T>(T);
+
+impl<T> Foo<T> {
+    const HASH_LEN: usize = 20;
+
+    fn stuff() {
+        let _ = Self::HASH_LEN;
+    }
+}
+
+fn main() { }