Add defensive checks and proper error handling to prevent crashes and handle edge cases gracefully. This includes using try-catch blocks around potentially unsafe operations, adding guard conditions to prevent infinite loops or invalid states, and ensuring the system can recover from unexpected inputs or conditions. Key practices: - Wrap property access or function calls that might fail in try-catch blocks, especially in contexts where external factors could cause failures - Add guard flags or conditions to prevent recursive error scenarios (e.g., preventing error handlers from triggering more errors) - Handle unknown or future cases by logging warnings and providing fallback behavior rather than throwing fatal errors - Add defensive resets or cleanup calls to prevent state corruption during error scenarios Example from the codebase: ```javascript // Add defensive try-catch around potentially unsafe operations try { if ((a === b) !== (get_proxied_value(a) === get_proxied_value(b))) { w.state_proxy_equality_mismatch(equal ? '===' : '!=='); } } catch { // Handle case where property access might be disallowed } // Add guard flags to prevent recursive error handling if (calling_on_error) { w.reset_misuse(); throw error; } // Provide fallback for unknown cases instead of crashing default: console.warn(`Unknown operator ${expression.operator}`); this.values.add(UNKNOWN); ``` This approach ensures the system remains stable and provides meaningful feedback even when encountering unexpected conditions or edge cases.