From dcd1f64c812763c161161fcd95d1c5a35c17127a Mon Sep 17 00:00:00 2001
From: Alexey Andreev <konsoletyper@gmail.com>
Date: Wed, 7 Aug 2019 18:34:06 +0300
Subject: [PATCH] JS: fix instanceof T[], where T is non-primitive type

---
 .../src/main/resources/org/teavm/backend/javascript/runtime.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/src/main/resources/org/teavm/backend/javascript/runtime.js b/core/src/main/resources/org/teavm/backend/javascript/runtime.js
index b612018f6..cb05e8e86 100644
--- a/core/src/main/resources/org/teavm/backend/javascript/runtime.js
+++ b/core/src/main/resources/org/teavm/backend/javascript/runtime.js
@@ -33,6 +33,9 @@ function $rt_isAssignable(from, to) {
     if (from === to) {
         return true;
     }
+    if (to.$meta.item !== null) {
+        return from.$meta.item !== null && $rt_isAssignable(from.$meta.item, to.$meta.item);
+    }
     var supertypes = from.$meta.supertypes;
     for (var i = 0; i < supertypes.length; i = (i + 1) | 0) {
         if ($rt_isAssignable(supertypes[i], to)) {