From 1d24b573e8e25daa63f302d41ccff698f5c23d07 Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Sun, 21 Jan 2018 15:57:14 +0200
Subject: Fix: return empty string from output callbacks

This prevents cliapp.runcmd from collecting all output into
a (potentially large) internal buffer, which only gets thrown away
when it returns.
---
 worker_manager | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'worker_manager')

diff --git a/worker_manager b/worker_manager
index 3fc3220..85cd2b2 100755
--- a/worker_manager
+++ b/worker_manager
@@ -357,7 +357,7 @@ class Runner:
         self._buffers[stream_name] += data.decode('UTF-8')
         if len(self._buffers[stream_name]) >= self._maxbuf:
             self.flush()
-        return None
+        return b''
 
     def flush(self):
         logging.debug('flushing: self._buffers=%r', self._buffers)
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