From cb835d593266f5a06f7ff400d6652a4ed807d817 Mon Sep 17 00:00:00 2001
From: "vn.py" <xiaoyou.chen@foxmail.com>
Date: Thu, 7 Nov 2019 16:08:34 +0800
Subject: [PATCH] [Mod] close #2126

---
 vnpy/app/algo_trading/engine.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/vnpy/app/algo_trading/engine.py b/vnpy/app/algo_trading/engine.py
index fa72e59b..6b1acfd1 100644
--- a/vnpy/app/algo_trading/engine.py
+++ b/vnpy/app/algo_trading/engine.py
@@ -96,7 +96,10 @@ class AlgoEngine(BaseEngine):
 
     def process_timer_event(self, event: Event):
         """"""
-        for algo in self.algos.values():
+        # Generate a list of algos first to avoid dict size change
+        algos = list(self.algos.values())
+
+        for algo in algos:
             algo.update_timer()
 
     def process_trade_event(self, event: Event):