From https://github.com/IronLanguages/dlr/pull/261 Thread.Abort is not supported and throws PlatformNotSupportedException. Related to https://github.com/IronLanguages/dlr/issues/259 and https://github.com/IronLanguages/ironpython3/issues/1024.
From #261
Thread.Abort is not supported and throws PlatformNotSupportedException. Related to #259 and IronLanguages/ironpython3#1024.