From 343a305be9999850c8c7d9b0be544af93f826dbf Mon Sep 17 00:00:00 2001
From: Tony Garnock-Jones <tonygarnockjones@gmail.com>
Date: Wed, 21 Nov 2018 13:13:42 +0000
Subject: [PATCH] Fix error in routing via list patterns

---
 packages/core/src/skeleton.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/core/src/skeleton.js b/packages/core/src/skeleton.js
index a0f38f7..983bde3 100644
--- a/packages/core/src/skeleton.js
+++ b/packages/core/src/skeleton.js
@@ -69,7 +69,7 @@ function Handler(cachedCaptures) {
 function classOf(v) {
   if (v instanceof Record) {
     return v.getConstructorInfo();
-  } else if (v instanceof Immutable.List) {
+  } else if (Immutable.List.isList(v)) {
     return v.size;
   } else {
     return null;