From: Ben Darnell <bdarnell@beaker.local>
Date: Tue, 25 May 2010 18:40:42 +0000 (-0700)
Subject: Don't try to compute max() of an empty sequence (which throws an exception)
X-Git-Tag: v1.0.0~38
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57a9ac031a86aa1389144ea06638b5550d525b3e;p=thirdparty%2Ftornado.git

Don't try to compute max() of an empty sequence (which throws an exception)
---

diff --git a/tornado/httpclient.py b/tornado/httpclient.py
index 899f1636c..75adb63a7 100644
--- a/tornado/httpclient.py
+++ b/tornado/httpclient.py
@@ -226,7 +226,7 @@ class AsyncHTTPClient(object):
         for fd in exceptable:
             fds[fd] = fds.get(fd, 0) | 0x8 | 0x10
 
-        if max(fds.iterkeys()) > 900:
+        if fds and max(fds.iterkeys()) > 900:
             # Libcurl has a bug in which it behaves unpredictably with
             # file descriptors greater than 1024.  (This is because
             # even though it uses poll() instead of select(), it still