Description: The processResolvedRoutes function iterates through resolved routes to check for async handlers. However, it lacks a check to see if a route has already been processed. If an async route handler's result contains a circular reference (e.g., a route that is an ancestor in the routing tree), the function will enter an infinite recursion loop (processResolvedRoutes -> checkRouteForAsyncHandler -> handleAsyncHandlerResult -> processResolvedRoutes). This leads to a stack overflow, crashing the application.

Suggested fix: Add a guard within the forEach loop in processResolvedRoutes to check if a route has already been processed before calling checkRouteForAsyncHandler. This can be done by checking if (!allRoutes.has(child)), mirroring the protective logic found in getChildRoutesRecursively.
_{severity: 0.85, confidence: 0.9}

Description: The checkRouteForAsyncHandler function indiscriminately proxies every function found within a route's handle object. The handle object is often used for various purposes, including synchronous utility functions or metadata generators, not just the intended async route loaders. Every call to any of these proxied functions incurs unnecessary overhead from the proxy's apply trap and the subsequent call to handleAsyncHandlerResult. Because this logic is applied recursively to the entire route tree, it can cause significant performance degradation in applications with complex routing.

Suggested fix: Refine the logic in checkRouteForAsyncHandler to only proxy functions that are intended to be async route handlers. This could be achieved by checking for a specific naming convention for the handler key or introducing a mechanism to opt-in specific functions for proxying, rather than proxying all functions by default.
_{severity: 0.7, confidence: 0.95}