Merge branch '3.1'

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Ghostkeeper 2017-12-01 14:41:41 +01:00
commit 2236e0016d
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6 changed files with 70 additions and 17 deletions

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@ -394,7 +394,8 @@ class USBPrinterOutputDevice(PrinterOutputDevice):
self._listen_thread.join()
except:
pass
self._serial.close()
if self._serial is not None: # Avoid a race condition when a thread can change the value of self._serial to None
self._serial.close()
self._listen_thread = threading.Thread(target = self._listen)
self._listen_thread.daemon = True