What is the test for instructing a jury on intent to kill where the evidence of intent was overwhelming?

But as we explain, the evidence of defendant's intent to kill both victims was overwhelming, and the jury could have had no reasonable doubt on that [6 Cal.4th 46] matter. As in People v. Odle, supra, 45 Cal.3d at page 416, 247 Cal.Rptr. 137, 754 P.2d 184, "this is a case in which the facts overwhelmingly demonstrate that the instructional error was harmless." (See also People v. Harris, supra, 47 Cal.3d at p. 1100, 255 Cal.Rptr. 352, 767 P.2d 619 [failure to instruct on intent to kill harmless where evidence of such intent overwhelming].)