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Fix an error when closing USB connection. This error raised several

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times in the crash reports in the stats.
This commit is contained in:
Diego Prado Gesto 2017-12-01 13:17:36 +01:00
parent 7b4cb11240
commit e7ac2e37b4
1 changed files with 2 additions and 1 deletions
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3
plugins/USBPrinting/USBPrinterOutputDevice.py
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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