1 files changed, 1 insertions, 0 deletions
diff --git a/Lib/smtplib.py b/Lib/smtplib.py
index 9a83559..63732c8 100755
--- a/Lib/smtplib.py
+++ b/Lib/smtplib.py
@@ -174,6 +174,7 @@ else:
             chr = None
             while chr != b"\n":
                 chr = self.sslobj.read(1)
+                if not chr: break
                 str += chr
             return str