testThrowIsNotInStacktrace

Same query as testTripleStackTrace, but with baz/1's body replaced by throw(x): the resulting halt is a SystemError wrapping the uncaught x, and its logicStackTrace does not include a frame for throw/1 itself — only [baz/1, bar/1, foo/1, bagof/3, findall/3, ?-/1] — since a throw/1 call does not push a stack frame the way a user-defined goal invocation does.