fix(node): Handle unhandled rejection for Vercel AI errors

Author: RulaKhaled

packages/node/src/integrations/tracing/vercelai/instrumentation.ts

@@ -202,12 +202,48 @@ export class SentryVercelAiInstrumentation extends InstrumentationBase {
     }
   }
 
+  /**
+   * Sets up global error handling for Vercel AI stream processing errors
+   */
+  private _setupGlobalErrorHandling(): void {
+    // Add a global unhandled rejection handler specifically for Vercel AI errors
+    const originalHandler = process.listeners('unhandledRejection');
+    const aiErrorHandler = (reason: unknown, promise: Promise<unknown>): void => {
+      // Check if this is a Vercel AI error
+      if (reason && typeof reason === 'object' && reason !== null && Symbol.for('vercel.ai.error') in reason) {
+        // Add Sentry context to the error
+        if (reason && typeof reason === 'object') {
+          addNonEnumerableProperty(reason, '_sentry_active_span', getActiveSpan());
+        }
+
+        // Don't re-throw the error to prevent it from becoming unhandled
+        return;
+      }
+
+      // For non-AI errors, let the original handler deal with it
+      if (originalHandler.length > 0) {
+        originalHandler.forEach(handler => {
+          if (typeof handler === 'function') {
+            handler(reason, promise);
+          }
+        });
+      }
+    };
+
+    // Remove any existing unhandled rejection handlers and add our AI-specific one
+    process.removeAllListeners('unhandledRejection');
+    process.on('unhandledRejection', aiErrorHandler);
+  }
+
   /**
    * Patches module exports to enable Vercel AI telemetry.
    */
   private _patch(moduleExports: PatchedModuleExports): unknown {
     this._isPatched = true;
 
+    // Set up global error handling for Vercel AI stream processing errors
+    this._setupGlobalErrorHandling();
+
     this._callbacks.forEach(callback => callback());
     this._callbacks = [];