fix some await block stuff

src/compiler/compile/render_dom/wrappers/AwaitBlock.ts

@@ -137,6 +137,9 @@ export default class AwaitBlockWrapper extends Wrapper {
 
 		block.maintain_context = true;
 
+		const value_index = this.node.value && block.renderer.add_to_context(this.node.value, true);
+		const error_index = this.node.error && block.renderer.add_to_context(this.node.error, true);
+
 		const info_props: any = x`{
 			ctx: #ctx,
 			current: null,
@@ -144,8 +147,8 @@ export default class AwaitBlockWrapper extends Wrapper {
 			pending: ${this.pending.block.name},
 			then: ${this.then.block.name},
 			catch: ${this.catch.block.name},
-			value: ${this.then.block.name && x`"${this.node.value}"`},
-			error: ${this.catch.block.name && x`"${this.node.error}"`},
+			value: ${value_index},
+			error: ${error_index},
 			blocks: ${this.pending.block.has_outro_method && x`[,,,]`}
 		}`;
 
@@ -197,9 +200,11 @@ export default class AwaitBlockWrapper extends Wrapper {
 			if (this.pending.block.has_update_method) {
 				block.chunks.update.push(b`
 					if (${condition}) {
-						// nothing
+
 					} else {
-						${info}.block.p(@assign(@assign({}, #ctx), ${info}.resolved), #changed);
+						const #child_ctx = #ctx.slice();
+						#child_ctx[${value_index}] = ${info}.resolved;
+						${info}.block.p(#child_ctx, #changed);
 					}
 				`);
 			} else {
@@ -210,7 +215,11 @@ export default class AwaitBlockWrapper extends Wrapper {
 		} else {
 			if (this.pending.block.has_update_method) {
 				block.chunks.update.push(b`
-					${info}.block.p(@assign(@assign({}, #ctx), ${info}.resolved), #changed);
+					{
+						const #child_ctx = #ctx.slice();
+						#child_ctx[${value_index}] = ${info}.resolved;
+						${info}.block.p(#child_ctx, #changed);
+					}
 				`);
 			}
 		}

src/compiler/compile/render_dom/wrappers/Element/Binding.ts

@@ -111,12 +111,15 @@ export default class BindingWrapper {
 			{
 				const binding_group = get_binding_group(parent.renderer, this.node.expression.node);
 
+				block.renderer.add_to_context(`$$binding_groups`);
+				const reference = block.renderer.reference(`$$binding_groups`);
+
 				block.chunks.hydrate.push(
-					b`#ctx.$$binding_groups[${binding_group}].push(${parent.var});`
+					b`${reference}[${binding_group}].push(${parent.var});`
 				);
 
 				block.chunks.destroy.push(
-					b`#ctx.$$binding_groups[${binding_group}].splice(#ctx.$$binding_groups[${binding_group}].indexOf(${parent.var}), 1);`
+					b`${reference}[${binding_group}].splice(${reference}[${binding_group}].indexOf(${parent.var}), 1);`
 				);
 				break;
 			}

src/runtime/internal/await_block.ts

@@ -9,9 +9,15 @@ export function handle_promise(promise, info) {
 	function update(type, index, key?, value?) {
 		if (info.token !== token) return;
 
-		info.resolved = key && { [key]: value };
+		info.resolved = value;
+
+		let child_ctx = info.ctx;
+
+		if (key !== undefined) {
+			child_ctx = child_ctx.slice();
+			child_ctx[key] = value;
+		}
 
-		const child_ctx = assign(assign({}, info.ctx), info.resolved);
 		const block = type && (info.current = type)(child_ctx);
 
 		let needs_flush = false;
@@ -69,6 +75,6 @@ export function handle_promise(promise, info) {
 			return true;
 		}
 
-		info.resolved = { [info.value]: promise };
+		info.resolved = promise;
 	}
 }

test/runtime/samples/await-component-oncreate/_config.js

@@ -5,7 +5,7 @@ export default {
 		promise
 	},
 
-	test({ assert, component, target }) {
+	test({ assert, target }) {
 		return promise.then(() => {
 			assert.htmlEqual(target.innerHTML, `
 				<p>42</p>

test/runtime/samples/await-then-blowback-reactive/main.svelte

@@ -1,6 +1,6 @@
 <script>
 	import Widget from './Widget.svelte';
-	let promise = Promise.resolve(['a', 'b']);
+	export let promise = Promise.resolve(['a', 'b']);
 	let value;
 </script>