Adding to a TreeWidget doesn't work in certain contexts

[TheGag96]

I'm trying to incorporate a TreeWidget in my app, and I'm running into a problem where newChild() doesn't work if I use it in a button's click delegate. My code is more or less like this:

//note: i registered TreeWidget in DML manually
aTree= mainWindow.mainWidget.childById!TreeWidget("aTree");
aButton= mainWindow.mainWidget.childById!Button("aButton");

//this stuff works
TreeItem tree1 = aTree.items.newChild("group1", "Group 1"d, "document-open");
aTree.items.newChild("group2", "Group 1"d, "document-open");
tree1.newChild("g1_1", "Group 1 item"d);

aButton.click = delegate(Widget w) {
  //doesn't work, but is for sure being ran
  aTree.items.newChild("someid", "Some text"d);

  return true;
};

I assume this is a bug, but of course it could just be me doing something wrong. Thanks again!

[buggins]

Fixed - see example1.
TreeWidget now has add item / remove item buttons to test dynamic tree updates.

[TheGag96]

Oh awesome!! Nice to see this one finally fixed. Thank you!

[buggins]

thanks for reporting this