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I was adding a bound, constrained RW property with all the checkboxes checked. The local variable for the field was already in the class, so I got an exception. After that the ide froze. I'm attaching the thread dump
Created attachment 14561 [details] Thread dump (deadlock only)
org.openide.explorer.propertysheet.PropertySheet access AWTLock in non AWT thread. Reassigning.
*** This issue has been marked as a duplicate of 41833 ***
closed