Test that BaseSign can have a vtable

diff --git a/lightning/src/chain/keysinterface.rs b/lightning/src/chain/keysinterface.rs
index a1fef4dea28f66a066f00f08edb64329d5f59787..9714e992d5912276f004d964f10eb5e6b10ce235 100644 (file)
--- a/lightning/src/chain/keysinterface.rs
+++ b/lightning/src/chain/keysinterface.rs
@@ -1048,3 +1048,9 @@ impl KeysInterface for KeysManager {
                InMemorySigner::read(&mut std::io::Cursor::new(reader))
        }
 }
+
+// Ensure that BaseSign can have a vtable
+#[test]
+pub fn dyn_sign() {
+       let _signer: Box<dyn BaseSign>;
+}
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