diff -r 198f78a52a2f -r ddfb8887212d hgext/patchbomb.py
--- a/hgext/patchbomb.py	Sun Jan 10 18:15:39 2016 -0500
+++ b/hgext/patchbomb.py	Tue Jan 12 15:57:18 2016 -0800
@@ -235,10 +235,7 @@
         opts['type'] = btype
     try:
         commands.bundle(ui, repo, tmpfn, dest, **opts)
-        fp = open(tmpfn, 'rb')
-        data = fp.read()
-        fp.close()
-        return data
+        return util.readfile(tmpfn)
     finally:
         try:
             os.unlink(tmpfn)