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avoid NPE for synchronization issues on board list
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@ -54,7 +54,7 @@ public class SerialBoardsLister extends TimerTask {
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timer.schedule(this, 0, 1000);
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}
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public void retriggerDiscovery() {
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public synchronized void retriggerDiscovery() {
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while (BaseNoGui.packages == null) {
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try {
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Thread.sleep(1000);
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