--- a/servo/ports/geckolib/glue.rs
+++ b/servo/ports/geckolib/glue.rs
@@ -2797,17 +2797,17 @@ pub extern "C" fn Servo_ResolveStyle(ele
     // In the case where we process for throttled animation, there remaings
     // restyle hints other than animation hints.
     let flags = if restyle_behavior == Restyle::ForThrottledAnimationFlush {
         ANIMATION_ONLY
     } else {
         TraversalFlags::empty()
     };
     debug_assert!(element.has_current_styles_for_traversal(&*data, flags),
-                  "Resolving style on element without current styles");
+                  "Resolving style on {:?} without current styles: {:?}", element, data);
     data.styles.primary().clone().into_strong()
 }
 
 #[no_mangle]
 pub extern "C" fn Servo_ResolveStyleLazily(element: RawGeckoElementBorrowed,
                                            pseudo_type: CSSPseudoElementType,
                                            rule_inclusion: StyleRuleInclusion,
                                            snapshots: *const ServoElementSnapshotTable,