correctly mount await block that has an anchor

Author: Rich-Harris

src/generators/dom/visitors/AwaitBlock.ts

@@ -110,7 +110,7 @@ export default function visitAwaitBlock(
 	const anchorNode = state.parentNode ? 'null' : 'anchor';
 
 	block.builders.mount.addBlock(deindent`
-		${await_block}.m(${targetNode}, ${anchor});
+		${await_block}.m(${targetNode}, ${anchorNode});
 	`);
 
 	const conditions = [];

test/runtime/samples/await-then-catch-multiple/_config.js

@@ -0,0 +1,53 @@
+let fulfil;
+
+let thePromise = new Promise(f => {
+	fulfil = f;
+});
+
+export default {
+	data: {
+		thePromise
+	},
+
+	html: `
+		<p>loading...</p>
+		<p>loading...</p>
+	`,
+
+	test(assert, component, target) {
+		fulfil(42);
+
+		return thePromise
+			.then(() => {
+				assert.htmlEqual(target.innerHTML, `
+					<p>the value is 42</p>
+					<p>the value is 42</p>
+				`);
+
+				let reject;
+
+				thePromise = new Promise((f, r) => {
+					reject = r;
+				});
+
+				component.set({
+					thePromise
+				});
+
+				assert.htmlEqual(target.innerHTML, `
+					<p>loading...</p>
+					<p>loading...</p>
+				`);
+
+				reject(new Error('something broke'));
+
+				return thePromise.catch(() => {});
+			})
+			.then(() => {
+				assert.htmlEqual(target.innerHTML, `
+					<p>oh no! something broke</p>
+					<p>oh no! something broke</p>
+				`);
+			});
+	}
+};

test/runtime/samples/await-then-catch-multiple/main.html

@@ -0,0 +1,15 @@
+{{#await thePromise}}
+	<p>loading...</p>
+{{then theValue}}
+	<p>the value is {{theValue}}</p>
+{{catch theError}}
+	<p>oh no! {{theError.message}}</p>
+{{/await}}
+
+{{#await thePromise}}
+	<p>loading...</p>
+{{then theValue}}
+	<p>the value is {{theValue}}</p>
+{{catch theError}}
+	<p>oh no! {{theError.message}}</p>
+{{/await}}