Description Alexandr Miloslavskiy 2021-09-02 19:08:16 EDT

A snippet that demonstrates the problem:

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final Display display = new Display ();
final Shell shell = new Shell (display);
shell.setLayout (new GridLayout ());

final Tree tree = new Tree (shell, 0);
tree.setHeaderVisible (true);
new TreeItem(tree, 0).setText ("0");

shell.pack ();
shell.open ();

while (!shell.isDisposed ()) {
	if (!display.readAndDispatch ()) {
		display.sleep ();
	}
}

display.dispose ();
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The bug occurs since Bug 546490