people struggle integrating "undefined behavior" into sentences so here's a cheat sheet

the program has undefined behavior           the chair has long legs           good!
the program's behavior is undefined          the chair's legs are long         good!
the program exhibits undefined behavior      the chair exhibits long legs      sure
the program results in undefined behavior    the chair results in long legs    kinda?
the program is undefined behavior            the chair is long legs            nu-uh.
the program triggers undefined behavior      the chair triggers long legs      nu-uh.
the program invokes undefined behavior       the chair invokes long legs       nu-uh.