Test for sveltejs#4061

test/runtime/samples/component-slot-let-in-slot/Inner.svelte

@@ -0,0 +1 @@
+<slot/>

test/runtime/samples/component-slot-let-in-slot/Outer.svelte

@@ -0,0 +1,5 @@
+<script>
+	export let prop
+</script>
+
+<slot value={prop} />

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

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+export default {
+	props: {
+		prop: 'a',
+	},
+
+	html: 'a',
+
+	test({ assert, component, target }) {
+		component.prop = 'b';
+		assert.htmlEqual( target.innerHTML, 'b' );
+	}
+};

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

@@ -0,0 +1,10 @@
+<script>
+	import Outer from './Outer.svelte'
+	import Inner from './Inner.svelte'
+
+	export let prop
+</script>
+
+<Outer {prop} let:value>
+	<Inner>{value}</Inner>
+</Outer>