fix: add props to state_referenced_locally (#17266)

* add props to state_referenced_locally

* changeset

.changeset/curly-phones-cross.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+add props to state_referenced_locally

packages/svelte/src/compiler/phases/2-analyze/visitors/Identifier.js

@@ -114,7 +114,8 @@ export function Identifier(node, context) {
 						binding.initial.arguments[0].type !== 'SpreadElement' &&
 						!should_proxy(binding.initial.arguments[0], context.state.scope)))) ||
 				binding.kind === 'raw_state' ||
-				binding.kind === 'derived') &&
+				binding.kind === 'derived' ||
+				binding.kind === 'prop') &&
 			// We're only concerned with reads here
 			(parent.type !== 'AssignmentExpression' || parent.left !== node) &&
 			parent.type !== 'UpdateExpression'

packages/svelte/tests/validator/samples/static-state-reference/input.svelte

@@ -8,11 +8,21 @@
 	console.log(count);
 	console.log(doubled);
 
+	let {
+		prop
+	} = $props();
+	let prop_state = $state(prop);
+	let prop_derived = $derived(prop);
+	console.log(prop);
+	console.log(prop_derived);
+
 	// writes are okay
 	count++;
 	count = 1;
 	obj.a++;
 	obj.a = 1;
+	prop_state = 1;
+	prop_derived = 1;
 
 	// `count` here is correctly identified as a non-reference
 	let typed: { count: number } | null = null;

packages/svelte/tests/validator/samples/static-state-reference/warnings.json

@@ -34,5 +34,41 @@
 			"column": 20,
 			"line": 9
 		}
+	},
+	{
+		"code": "state_referenced_locally",
+		"end": {
+			"column": 29,
+			"line": 14
+		},
+		"message": "This reference only captures the initial value of `prop`. Did you mean to reference it inside a closure instead?",
+		"start": {
+			"column": 25,
+			"line": 14
+		}
+	},
+	{
+		"code": "state_referenced_locally",
+		"end": {
+			"column": 17,
+			"line": 16
+		},
+		"message": "This reference only captures the initial value of `prop`. Did you mean to reference it inside a closure instead?",
+		"start": {
+			"column": 13,
+			"line": 16
+		}
+	},
+	{
+		"code": "state_referenced_locally",
+		"end": {
+			"column": 25,
+			"line": 17
+		},
+		"message": "This reference only captures the initial value of `prop_derived`. Did you mean to reference it inside a closure instead?",
+		"start": {
+			"column": 13,
+			"line": 17
+		}
 	}
 ]