fix

src/compiler/compile/render_dom/Block.ts

@@ -3,6 +3,7 @@ import Wrapper from './wrappers/shared/Wrapper';
 import { b, x } from 'code-red';
 import { Node, Identifier, ArrayPattern, Literal, CallExpression } from 'estree';
 import { is_head } from './wrappers/shared/is_head';
+import { sanitize_name } from '../utils/stringify';
 
 export interface BlockOptions {
 	parent?: Block;
@@ -465,14 +466,14 @@ export default class Block {
 				node.callee.name === "@listen"
 			) {
 				// b`@listen(ref, "type", args);`
-				const listener = this.get_unique_name(`${(node.arguments[1] as Literal).value}_listener`);
+				const listener = this.get_unique_name(`${sanitize_name((node.arguments[1] as Literal).value)}_listener`);
 				this.add_variable(listener);
 				mount.push(b`${listener} = ${node};`);
 				destroy.push(b`${listener}();`)
 			} else if (
 				node.type === "AssignmentExpression" &&
 				node.left.type === "Identifier" &&
-				node.left.name.endsWith("_action")
+				node.left.name.includes("_action")
 			) {
 				// b`identifier = use_action(args);`
 				mount.push(node);

src/compiler/compile/render_dom/index.ts

@@ -448,7 +448,8 @@ export default function dom(
 
 				${unknown_props_check}
 
-				${component.slots.size || component.compile_options.dev ? b`let { $$slots = {}, $$scope } = $$props;` : null}
+				${component.slots.size || component.compile_options.dev ? b`let { $$slots = {} } = $$props;` : null}
+				${component.slots.size ? b`let { $$scope } = $$props;` : null}
 				${component.compile_options.dev && b`@validate_slots('${component.tag}', $$slots, [${[...component.slots.keys()].map(key => `'${key}'`).join(',')}]);`}
 
 				${renderer.binding_groups.length > 0 && b`const $$binding_groups = [${renderer.binding_groups.map(_ => x`[]`)}];`}

src/compiler/compile/render_dom/wrappers/shared/add_actions.ts

@@ -1,6 +1,7 @@
 import { b, x } from 'code-red';
 import Block from '../../Block';
 import Action from '../../../nodes/Action';
+import { sanitize_name } from '../../../utils/stringify';
 export default function add_actions(
 	block: Block,
 	target: string,
@@ -18,7 +19,7 @@ export function add_action(block: Block, target: string, action: Action) {
 		dependencies = expression.dynamic_dependencies();
 	}
 
-	const id = block.get_unique_name(`${action.name.replace(/[^a-zA-Z0-9_$]/g, '_')}_action`);
+	const id = block.get_unique_name(`${sanitize_name(action.name)}_action`);
 	block.add_variable(id);
 
 	const fn = block.renderer.reference(action.name);

src/compiler/compile/utils/stringify.ts

@@ -5,6 +5,10 @@ export function string_literal(data: string) {
 	};
 }
 
+export function sanitize_name(str){
+	return str.replace(/[^a-zA-Z0-9_$]/g, '_')
+}
+
 export function escape(data: string, { only_escape_at_symbol = false } = {}) {
 	return data.replace(only_escape_at_symbol ? /@+/g : /(@+|#+)/g, (match: string) => {
 		return match + match[0];