From 42c4c4cfda8aa9f8d69b463f93bd1bf048e1b319 Mon Sep 17 00:00:00 2001
From: seven332 <seven332@163.com>
Date: Sat, 19 Mar 2016 01:14:25 +0800
Subject: [PATCH] Ensure poll safe for some bad ROM

---
 .../main/java/com/hippo/ehviewer/spider/SpiderQueen.java    | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/com/hippo/ehviewer/spider/SpiderQueen.java b/app/src/main/java/com/hippo/ehviewer/spider/SpiderQueen.java
index b648c424c..1fd8ce66d 100644
--- a/app/src/main/java/com/hippo/ehviewer/spider/SpiderQueen.java
+++ b/app/src/main/java/com/hippo/ehviewer/spider/SpiderQueen.java
@@ -830,7 +830,11 @@ public class SpiderQueen implements Runnable {
         while (!Thread.currentThread().isInterrupted()) {
             Integer index;
             synchronized (mPTokenLock) {
-                index = mRequestPTokenQueue.poll();
+                if (mRequestPTokenQueue.isEmpty()) {
+                    index = null;
+                } else {
+                    index = mRequestPTokenQueue.poll();
+                }
             }
 
             if (index == null) {