From cb9b0760f23d4c93b0b55b4ab5b4fc67f3a78851 Mon Sep 17 00:00:00 2001
From: Johannes Pohl <Johannes.Pohl90@gmail.com>
Date: Tue, 18 Dec 2018 19:52:28 +0100
Subject: [PATCH] fix crash for spectrum analyzer with GR backend (#587)

---
 src/urh/dev/gr/SpectrumThread.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/urh/dev/gr/SpectrumThread.py b/src/urh/dev/gr/SpectrumThread.py
index 47dd59d961..cfe99ee6f0 100644
--- a/src/urh/dev/gr/SpectrumThread.py
+++ b/src/urh/dev/gr/SpectrumThread.py
@@ -30,6 +30,9 @@ def run(self):
             while not self.isInterruptionRequested():
                 try:
                     rcvd += recv(32768)  # Receive Buffer = 32768 Byte
+                except zmq.error.Again:
+                    # timeout
+                    continue
                 except (zmq.error.ContextTerminated, ConnectionResetError):
                     self.stop("Stopped receiving, because connection was reset")
                     return