fixed queue get

master.py

@@ -8,7 +8,7 @@ import shutil
 import subprocess
 import sys
 import time
-from queue import Queue
+from queue import Queue, Empty
 
 import semver
 import yaml
@@ -215,7 +215,10 @@ if __name__ == '__main__':
 
     while True:
         if q.qsize() > 0:
-            build(*q.get())
+            try:
+                build(*q.get_nowait())
+            except Empty:
+                pass
         else:
             time.sleep(60)