According to the SWTOR team, this is both a bug and a potential exploit in one of the game’s new uprisings: “There is currently an issue with the first boss, Lord Anril, where in certain situations he will instantly kill himself.”
Obviously, by triggering the bug, players can progress through the uprising much faster than otherwise. The team isn’t prosecuting exploiters due to the possibility of this happening on its own and the sheer popularity of this particular uprising. The bug will be fixed in an update on January 24th.
Source: Official forums. Thanks Shintar!