Handle top-level null values

Closes #22
sindresorhus · Sep 23, 2019 · 5ed49e4 · 5ed49e4
1 parent cbfd109
commit 5ed49e4
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diff --git a/index.js b/index.js
@@ -49,7 +49,7 @@ const destroyCircular = (from, seen, to_) => {
 };
 
 const serializeError = value => {
-	if (typeof value === 'object') {
+	if (typeof value === 'object' && value !== null) {
 		return destroyCircular(value, []);
 	}
 

diff --git a/test.js b/test.js
@@ -109,6 +109,11 @@ test('should serialize nested errors', t => {
 	t.is(serialized.innerError.message, 'inner error');
 });
 
+test('should handle top-level null values', t => {
+	const serialized = serializeError(null);
+	t.is(serialized, null);
+});
+
 test('should deserialize null', t => {
 	const deserialized = deserializeError(null);
 	t.true(deserialized instanceof Error);