From 09536423e83892e716de13b2d14f12fff757f5a0 Mon Sep 17 00:00:00 2001
From: Martin Probst <martin@probst.io>
Date: Mon, 21 Oct 2019 14:44:13 +0200
Subject: [PATCH] fix(zone.js): work around TS3.7 issue (#33294)

In TypeScript 3.7, circularity detection misfires on the declaration of `value` here.
https://github.com/microsoft/TypeScript/issues/32950

Declaring an explicit type avoids the problem.

PR Close #33294
---
 packages/zone.js/lib/zone-spec/wtf.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/zone.js/lib/zone-spec/wtf.ts b/packages/zone.js/lib/zone-spec/wtf.ts
index 7da91d744d..c0ff9b160f 100644
--- a/packages/zone.js/lib/zone-spec/wtf.ts
+++ b/packages/zone.js/lib/zone-spec/wtf.ts
@@ -131,7 +131,8 @@
     const out: {[k: string]: any} = {};
     for (const key in obj) {
       if (obj.hasOwnProperty(key)) {
-        let value = obj[key];
+        // explicit : any due to https://github.com/microsoft/TypeScript/issues/33191
+        let value: any = obj[key];
         switch (typeof value) {
           case 'object':
             const name = value && value.constructor && (<any>value.constructor).name;