Yes, Be GUI is heavily multithreaded, so core dumps were kind of common, and stuff like Swing.invokeLater(closure) only came later in Swing, after existing for a while as community library, after folks having the same issues in Java GUI applications.

Note that on Android they took an hammer solution, programming patters to invoke such code on main thread, have as outcome that there are either lint compile errors, or platform killing the application, for those flows not verifiable at compile time.