From 59b886fcbf6d028cbb10bf8b25bbe8ec89e0aca6 Mon Sep 17 00:00:00 2001
From: Tan Li Hau <lhtan93@gmail.com>
Date: Tue, 26 Nov 2019 22:22:43 +0800
Subject: [PATCH] fix handle marking global variable as dependency

---
 src/compiler/compile/nodes/Binding.ts                    | 4 +++-
 .../samples/bindings-global-dependency/_config.js        | 3 +++
 .../samples/bindings-global-dependency/main.svelte       | 9 +++++++++
 3 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 test/runtime/samples/bindings-global-dependency/_config.js
 create mode 100644 test/runtime/samples/bindings-global-dependency/main.svelte

diff --git a/src/compiler/compile/nodes/Binding.ts b/src/compiler/compile/nodes/Binding.ts
index b298a9d183..28e6af5aa1 100644
--- a/src/compiler/compile/nodes/Binding.ts
+++ b/src/compiler/compile/nodes/Binding.ts
@@ -52,7 +52,9 @@ export default class Binding extends Node {
 		} else if (this.is_contextual) {
 			scope.dependencies_for_name.get(name).forEach(name => {
 				const variable = component.var_lookup.get(name);
-				variable[this.expression.node.type === 'MemberExpression' ? 'mutated' : 'reassigned'] = true;
+				if (variable) {
+					variable[this.expression.node.type === 'MemberExpression' ? 'mutated' : 'reassigned'] = true;
+				}
 			});
 		} else {
 			const variable = component.var_lookup.get(name);
diff --git a/test/runtime/samples/bindings-global-dependency/_config.js b/test/runtime/samples/bindings-global-dependency/_config.js
new file mode 100644
index 0000000000..f5ab04de78
--- /dev/null
+++ b/test/runtime/samples/bindings-global-dependency/_config.js
@@ -0,0 +1,3 @@
+export default {
+	html: '<input type="text">'
+};
\ No newline at end of file
diff --git a/test/runtime/samples/bindings-global-dependency/main.svelte b/test/runtime/samples/bindings-global-dependency/main.svelte
new file mode 100644
index 0000000000..15a4381a06
--- /dev/null
+++ b/test/runtime/samples/bindings-global-dependency/main.svelte
@@ -0,0 +1,9 @@
+<script>
+	let data = {
+		a: {value:''}
+	}
+</script>
+
+{#each Object.values(data) as object}
+	<input type="text" bind:value={object.value} />
+{/each}
\ No newline at end of file