fix: try-catch deep read (#10270)

Accessing values might throw errors if they're not just values but getters. Guard against that by try-catching every access so that `$inspect` doesn't fail
fixes the iframe error in the playground reported in #10174

.changeset/rich-waves-mix.md

@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: try-catch deep read during `$inspect`

packages/svelte/src/internal/client/runtime.js

@@ -1965,7 +1965,11 @@ function deep_read(value, visited = new Set()) {
 	if (typeof value === 'object' && value !== null && !visited.has(value)) {
 		visited.add(value);
 		for (let key in value) {
+			try {
 				deep_read(value[key], visited);
+			} catch (e) {
+				// continue
+			}
 		}
 		const proto = Object.getPrototypeOf(value);
 		if (
@@ -1979,7 +1983,11 @@ function deep_read(value, visited = new Set()) {
 			for (let key in descriptors) {
 				const get = descriptors[key].get;
 				if (get) {
+					try {
 						get.call(value);
+					} catch (e) {
+						// continue
+					}
 				}
 			}
 		}