From 0e90ddcb0af192b3947e52e20d60ef0b3755fff1 Mon Sep 17 00:00:00 2001
From: Rich Harris <richard.a.harris@gmail.com>
Date: Mon, 24 Jun 2019 17:30:14 -0400
Subject: [PATCH] always run onDestroy functions - fixes #3058

---
 src/runtime/internal/Component.ts                |  2 +-
 test/runtime/samples/ondestroy-deep/A.svelte     | 15 +++++++++++++++
 test/runtime/samples/ondestroy-deep/B.svelte     | 15 +++++++++++++++
 test/runtime/samples/ondestroy-deep/C.svelte     |  8 ++++++++
 test/runtime/samples/ondestroy-deep/_config.js   | 10 ++++++++++
 test/runtime/samples/ondestroy-deep/destroyed.js |  3 +++
 test/runtime/samples/ondestroy-deep/main.svelte  |  9 +++++++++
 7 files changed, 61 insertions(+), 1 deletion(-)
 create mode 100644 test/runtime/samples/ondestroy-deep/A.svelte
 create mode 100644 test/runtime/samples/ondestroy-deep/B.svelte
 create mode 100644 test/runtime/samples/ondestroy-deep/C.svelte
 create mode 100644 test/runtime/samples/ondestroy-deep/_config.js
 create mode 100644 test/runtime/samples/ondestroy-deep/destroyed.js
 create mode 100644 test/runtime/samples/ondestroy-deep/main.svelte

diff --git a/src/runtime/internal/Component.ts b/src/runtime/internal/Component.ts
index 753d1c8a9872..9221a683b851 100644
--- a/src/runtime/internal/Component.ts
+++ b/src/runtime/internal/Component.ts
@@ -54,7 +54,7 @@ export function destroy_component(component, detaching) {
 	if (component.$$.fragment) {
 		run_all(component.$$.on_destroy);
 
-		if (detaching) component.$$.fragment.d(1);
+		component.$$.fragment.d(detaching);
 
 		// TODO null out other refs, including component.$$ (but need to
 		// preserve final state?)
diff --git a/test/runtime/samples/ondestroy-deep/A.svelte b/test/runtime/samples/ondestroy-deep/A.svelte
new file mode 100644
index 000000000000..a1a740bc2ec2
--- /dev/null
+++ b/test/runtime/samples/ondestroy-deep/A.svelte
@@ -0,0 +1,15 @@
+<script>
+	import { onDestroy } from 'svelte';
+	import { destroyed } from './destroyed.js';
+	import B from './B.svelte';
+
+	let yes = 1;
+
+	onDestroy(() => destroyed.push('A'));
+</script>
+
+<div>
+	{#if yes}
+		<B/>
+	{/if}
+</div>
\ No newline at end of file
diff --git a/test/runtime/samples/ondestroy-deep/B.svelte b/test/runtime/samples/ondestroy-deep/B.svelte
new file mode 100644
index 000000000000..78b042f2d678
--- /dev/null
+++ b/test/runtime/samples/ondestroy-deep/B.svelte
@@ -0,0 +1,15 @@
+<script>
+	import { onDestroy } from 'svelte';
+	import { destroyed } from './destroyed.js';
+	import C from './C.svelte';
+
+	let yes = 1;
+
+	onDestroy(() => destroyed.push('B'));
+</script>
+
+<div>
+	{#if yes}
+		<C/>
+	{/if}
+</div>
\ No newline at end of file
diff --git a/test/runtime/samples/ondestroy-deep/C.svelte b/test/runtime/samples/ondestroy-deep/C.svelte
new file mode 100644
index 000000000000..27f33c93fcca
--- /dev/null
+++ b/test/runtime/samples/ondestroy-deep/C.svelte
@@ -0,0 +1,8 @@
+<script>
+	import { onDestroy } from 'svelte';
+	import { destroyed } from './destroyed.js';
+
+	let yes = 1;
+
+	onDestroy(() => destroyed.push('C'));
+</script>
\ No newline at end of file
diff --git a/test/runtime/samples/ondestroy-deep/_config.js b/test/runtime/samples/ondestroy-deep/_config.js
new file mode 100644
index 000000000000..4431a2e16317
--- /dev/null
+++ b/test/runtime/samples/ondestroy-deep/_config.js
@@ -0,0 +1,10 @@
+import { destroyed, reset } from './destroyed.js';
+
+export default {
+	test({ assert, component }) {
+		component.visible = false;
+		assert.deepEqual(destroyed, ['A', 'B', 'C']);
+
+		reset();
+	}
+};
\ No newline at end of file
diff --git a/test/runtime/samples/ondestroy-deep/destroyed.js b/test/runtime/samples/ondestroy-deep/destroyed.js
new file mode 100644
index 000000000000..4a99a931d487
--- /dev/null
+++ b/test/runtime/samples/ondestroy-deep/destroyed.js
@@ -0,0 +1,3 @@
+export let destroyed = [];
+
+export const reset = () => destroyed.length = 0;
\ No newline at end of file
diff --git a/test/runtime/samples/ondestroy-deep/main.svelte b/test/runtime/samples/ondestroy-deep/main.svelte
new file mode 100644
index 000000000000..d584dc1b8553
--- /dev/null
+++ b/test/runtime/samples/ondestroy-deep/main.svelte
@@ -0,0 +1,9 @@
+<script>
+	import A from './A.svelte';
+
+	export let visible = true;
+</script>
+
+{#if visible}
+	<A/>
+{/if}
\ No newline at end of file