fix(v8/svelte): Guard component tracking beforeUpdate call

Author: Lms24

packages/svelte/src/performance.ts

@@ -2,7 +2,7 @@ import { SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN } from '@sentry/browser';
 import type { Span } from '@sentry/core';
 import { afterUpdate, beforeUpdate, onMount } from 'svelte';
 
-import { startInactiveSpan } from '@sentry/core';
+import { logger, startInactiveSpan } from '@sentry/core';
 import { DEFAULT_COMPONENT_NAME, UI_SVELTE_INIT, UI_SVELTE_UPDATE } from './constants';
 import type { TrackComponentOptions } from './types';
 
@@ -36,7 +36,13 @@ export function trackComponent(options?: TrackComponentOptions): void {
   }
 
   if (mergedOptions.trackUpdates) {
-    recordUpdateSpans(componentName);
+    try {
+      recordUpdateSpans(componentName);
+    } catch (e) {
+      logger.warn(
+        "Cannot track component updates. This is likely because you're using Svelte 5 in Runes mode. Set `trackUpdates: false` in `withSentryConfig` or `trackComponent` to disable this warning.",
+      );
+    }
   }
 }