handle empty each blocks

src/generators/nodes/EachBlock.ts

@@ -109,6 +109,8 @@ export default class EachBlock extends Node {
 		parentNode: string,
 		parentNodes: string
 	) {
+		if (this.children.length === 0) return;
+
 		const { generator } = this;
 
 		const each = this.var;

test/runtime/samples/each-block-keyed-empty/_config.js

@@ -0,0 +1,7 @@
+export default {
+	data: {
+		x: [{ z: 1 }, { z: 2 }],
+	},
+
+	html: ``
+};

test/runtime/samples/each-block-keyed-empty/main.html

@@ -0,0 +1 @@
+{{#each x as y @z}}{{/each}}