Fixed bug with slot props variables

src/compiler/compile/render_dom/index.ts

@@ -311,6 +311,9 @@ export default function dom(
 	const reactive_stores = component.vars.filter(variable => variable.name[0] === '$' && variable.name[1] !== '$');
 
 	if (component.slots.size > 0) {
+		component.vars.map(v => {
+			if (v.hoistable) filtered_declarations.push(v.name);
+		});
 		filtered_declarations.push('$$slots', '$$scope');
 	}
 

test/runtime/samples/component-slot-let-e/Nested.svelte

@@ -0,0 +1,7 @@
+<script>
+	let fooText = 'foo';
+</script>
+
+<div>
+	<slot someText={fooText}></slot>
+</div>

test/runtime/samples/component-slot-let-e/_config.js

@@ -0,0 +1,20 @@
+export default {
+	html: `
+		<div>
+			<p>foo</p>
+		</div>
+	`,
+
+	async test({ assert, target, window }) {
+		const div = target.querySelector('div');
+		const click = new window.MouseEvent('click');
+
+		await div.dispatchEvent(click);
+
+		assert.htmlEqual(target.innerHTML, `
+			<div>
+				<p>foo</p>
+			</div>
+		`);
+	}
+};

test/runtime/samples/component-slot-let-e/main.svelte

@@ -0,0 +1,7 @@
+<script>
+	import Nested from './Nested.svelte';
+</script>
+
+<Nested let:someText={someText}>
+	<p>{someText}</p>
+</Nested>