static str now returns itself as src

feels like a hack... but ok...
chaining is bad in rust it seems

rama-utils/src/macros/error.rs

@@ -25,7 +25,11 @@ macro_rules! __static_str_error {
             }
         }
 
-        impl std::error::Error for $name {}
+        impl std::error::Error for $name {
+            fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+                Some(self)
+            }
+        }
     }
 }
 #[doc(inline)]