In SAS9.4 ,can write this . Funny thing ?

NOTE: IML Ready
57 Y = 1/20;
58 freq = 1;
59 C={.33,.44,.55,.49,.50,.22,.4,.8,.01,.36,.2,.4};
60 d = dur(Y, freq, C);
61 print d;
62 quit;
NOTE: Exiting IML.

The result is wrong. Very funny . IML didn't complain it .