GitHub user matthiasblaesing edited a comment on the discussion: Windows
clipboard issues discussion
And this also ~reproduces the problem~ raises the assertion for me:
```java
package eu.doppelhelix.test.clipboardreproducer;
import java.awt.Toolkit;
import java.awt.datatransfer.FlavorEvent;
import java.awt.datatransfer.FlavorListener;
import java.awt.datatransfer.StringSelection;
import javax.swing.SwingUtilities;
public class Clipboardreproducer2 {
private static final System.Logger LOG =
System.getLogger(Clipboardreproducer.class.getName());
public static void main(String[] args) throws Exception {
SwingUtilities.invokeLater(() -> {
Toolkit.getDefaultToolkit().getSystemClipboard().addFlavorListener(new
FlavorListener() {
@Override
public void flavorsChanged(FlavorEvent e) {
LOG.log(System.Logger.Level.INFO, "Flavor Changed: {0} //
{1}", e, SwingUtilities.isEventDispatchThread());
}
});
});
// Copy operation one: copy from EDT
Runnable copy = new Runnable() {
public void run() {
try {
Toolkit.getDefaultToolkit().getSystemClipboard().setContents(new
StringSelection("Test"), null);
LOG.log(System.Logger.Level.INFO, "Copy 1");
} catch (IllegalStateException ex) {
LOG.log(System.Logger.Level.ERROR, "Failed to invoke copy
(1)", ex);
}
SwingUtilities.invokeLater(this);
}
};
SwingUtilities.invokeLater(copy);
Thread.sleep(60 * 1000);
}
}
```
After 10-20 rounds I get assertion errors. It seems it just needs brute force
to get into the problematic situation. I'll see if this is reproducible on a
clean Windows 10/11 next.
GitHub link:
https://github.com/apache/netbeans/discussions/7051#discussioncomment-12743356
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