fix(platform): snapshot session fault errors safely

cocoscreator_projects/YouleNexus/assets/framework/sdk/runtime/game-session-host.ts

@@ -19,39 +19,64 @@ export type GameSessionState =
   | 'disposing'
   | 'disposed';
 
+export type GameSessionOpenFaultErrors = readonly [unknown, unknown];
+
 export class GameSessionOpenFault extends Error {
-  readonly errors: readonly unknown[];
+  declare readonly errors: GameSessionOpenFaultErrors;
 
   constructor(primary: unknown, cleanup: unknown) {
     super('Game session open failed and module cleanup also failed');
     this.name = 'GameSessionOpenFault';
-    Object.defineProperty(this, GAME_SESSION_OPEN_FAULT_BRAND, { value: true });
-    this.errors = Object.freeze([primary, cleanup]);
+    const errors = Object.freeze([primary, cleanup] as [unknown, unknown]);
+    Object.defineProperties(this, {
+      [GAME_SESSION_OPEN_FAULT_BRAND]: {
+        value: true,
+        writable: false,
+        enumerable: false,
+        configurable: false,
+      },
+      errors: {
+        value: errors,
+        writable: false,
+        enumerable: true,
+        configurable: false,
+      },
+    });
   }
 }
 
 export interface GameSessionOpenFaultShape {
-  readonly errors: readonly [unknown, unknown];
+  readonly errors: GameSessionOpenFaultErrors;
 }
 
-/** Recognizes open faults across realms and duplicate module instances. */
-export function isGameSessionOpenFault(value: unknown): value is GameSessionOpenFaultShape {
-  if (value === null || typeof value !== 'object') return false;
+/** Snapshots open-fault errors across realms and duplicate module instances. */
+export function extractGameSessionOpenFaultErrors(
+  value: unknown,
+): GameSessionOpenFaultErrors | null {
+  if (value === null || typeof value !== 'object') return null;
 
   try {
     const brand = ownDataDescriptor(value, GAME_SESSION_OPEN_FAULT_BRAND);
     const errors = ownDataDescriptor(value, 'errors');
-    if (brand?.value !== true || !errors || !Array.isArray(errors.value)) return false;
+    if (brand?.value !== true || !errors || !Array.isArray(errors.value)) return null;
 
     const errorList = errors.value;
-    return ownDataDescriptor(errorList, 'length')?.value === 2
-      && ownDataDescriptor(errorList, '0') !== undefined
-      && ownDataDescriptor(errorList, '1') !== undefined;
+    const length = ownDataDescriptor(errorList, 'length');
+    const primary = ownDataDescriptor(errorList, '0');
+    const cleanup = ownDataDescriptor(errorList, '1');
+    if (length?.value !== 2 || !primary || !cleanup) return null;
+
+    return Object.freeze([primary.value, cleanup.value] as [unknown, unknown]);
   } catch {
-    return false;
+    return null;
   }
 }
 
+/** Recognizes open faults across realms and duplicate module instances. */
+export function isGameSessionOpenFault(value: unknown): value is GameSessionOpenFaultShape {
+  return extractGameSessionOpenFaultErrors(value) !== null;
+}
+
 /** Validates the compile-time game identity before it reaches the runtime. */
 export function assertGameEntry(entry: GameEntry): void {
   assertNonEmptyText(entry.key, 'key');