From 4af920094a78f751b760d1fb55ca29227f0361cd Mon Sep 17 00:00:00 2001
From: David Wilson <dw@botanicus.net>
Date: Fri, 29 Sep 2017 16:38:59 +0530
Subject: [PATCH] iter_read: also treat 0-byte read as disconnection

---
 mitogen/master.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mitogen/master.py b/mitogen/master.py
index 5aef0ec9..c3a52788 100644
--- a/mitogen/master.py
+++ b/mitogen/master.py
@@ -174,7 +174,8 @@ def iter_read(fd, deadline=None):
             continue
 
         s, disconnected = mitogen.core.io_op(os.read, fd, 4096)
-        if disconnected:
+        IOLOG.debug('iter_read(%r) -> %r', fd, s)
+        if disconnected or not s:
             raise mitogen.core.StreamError(
                 'EOF on stream; last 300 bytes received: %r' %
                 (''.join(bits)[-300:],)