validate contents of await blocks (#1061)

src/validate/html/index.ts

@@ -54,6 +54,12 @@ export default function validateHtml(validator: Validator, html: Node) {
 		if (node.else) {
 			visit(node.else);
 		}
+
+		if (node.type === 'AwaitBlock') {
+			visit(node.pending);
+			visit(node.then);
+			visit(node.catch);
+		}
 	}
 
 	html.children.forEach(visit);

test/validator/samples/await-component-is-used/input.html

@@ -0,0 +1,17 @@
+{{#await promise}}
+	<p>Loading</p>
+{{then data}}
+	<Component :data />
+{{catch err}}
+	<p>Error: {{err}}</p>
+{{/await}}
+
+<script>
+	import Component from './Component.html';
+
+	export default {
+		components: {
+			Component
+		}
+	};
+</script>

test/validator/samples/await-component-is-used/warnings.json

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