--- a/js/src/gc/Tracer.cpp
+++ b/js/src/gc/Tracer.cpp
@@ -459,16 +459,22 @@ JS_GetTraceThingInfo(char* buf, size_t b
                     snprintf(buf, bufsize, "<nonlinear desc>");
                 }
             } else {
                 snprintf(buf, bufsize, "<null>");
             }
             break;
           }
 
+          case JS::TraceKind::Scope:
+          {
+            js::Scope* scope = static_cast<js::Scope*>(thing);
+            snprintf(buf, bufsize, " %s", js::ScopeKindString(scope->kind()));
+          }
+
           default:
             break;
         }
     }
     buf[bufsize - 1] = '\0';
 }
 
 JS::CallbackTracer::CallbackTracer(JSContext* cx, WeakMapTraceKind weakTraceKind)