fix: ensure $inspect.trace works correctly with null values (#14853)

* fix: ensure $inspect.trace works correctly with null values

* fix: ensure $inspect.trace works correctly with null values

.changeset/rotten-ligers-agree.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: ensure $inspect.trace works correctly with null values

packages/svelte/src/internal/client/dev/tracing.js

@@ -51,7 +51,9 @@ function log_entry(signal, entry) {
 		status !== 'clean'
 			? 'color: CornflowerBlue; font-weight: bold'
 			: 'color: grey; font-weight: bold',
-		typeof value === 'object' && STATE_SYMBOL in value ? snapshot(value, true) : value
+		typeof value === 'object' && value !== null && STATE_SYMBOL in value
+			? snapshot(value, true)
+			: value
 	);
 
 	if (type === '$derived') {