fix: use snippet as parent element of snippets childrens in validator (#11463)

* fix: use snippet as parent element of snippets childrens in validator

* Update packages/svelte/src/compiler/phases/2-analyze/validation.js

* Update .changeset/wet-pears-remain.md

---------

Co-authored-by: Rich Harris <hello@rich-harris.dev>

.changeset/wet-pears-remain.md

@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: skip parent element validation for snippet contents

packages/svelte/src/compiler/phases/2-analyze/validation.js

@@ -622,6 +622,8 @@ const validation = {
 	SnippetBlock(node, context) {
 		validate_block_not_empty(node.body, context);
 
+		context.next({ ...context.state, parent_element: null });
+
 		if (node.expression.name !== 'children') return;
 
 		const { path } = context;

packages/svelte/tests/validator/samples/non-invalid-node-placement-if-snippet/errors.json

@@ -0,0 +1 @@
+[]

packages/svelte/tests/validator/samples/non-invalid-node-placement-if-snippet/input.svelte

@@ -0,0 +1,10 @@
+<table>
+	<tbody>
+		<tr>
+			{#snippet cell(v)}Value: {v}{/snippet}
+			{#each [1, 2, 3] as v}
+				<td>{@render cell(v)}</td>
+			{/each}
+		</tr>
+	</tbody>
+</table>