From e1bbb064a10d0b4bf5563e0a79396665d83935a1 Mon Sep 17 00:00:00 2001
From: Richard Moore <github@ricmoo.com>
Date: Tue, 4 Aug 2020 20:49:40 -0400
Subject: [PATCH] Do not mutate connection in fetchJson.

---
 packages/web/src.ts/index.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/web/src.ts/index.ts b/packages/web/src.ts/index.ts
index d5330f9fa6..0445cbf378 100644
--- a/packages/web/src.ts/index.ts
+++ b/packages/web/src.ts/index.ts
@@ -313,7 +313,7 @@ export function fetchJson(connection: string | ConnectionInfo, json?: string, pr
         body = toUtf8Bytes(json);
 
         // Create a connection with the content-type set for JSON
-        const updated: ConnectionInfo = (typeof(connection) === "string") ? ({ url: connection }): connection;
+        const updated: ConnectionInfo = (typeof(connection) === "string") ? ({ url: connection }): shallowCopy(connection);
         if (updated.headers) {
             const hasContentType = (Object.keys(updated.headers).filter((k) => (k.toLowerCase() === "content-type")).length) !== 0;
             if (!hasContentType) {