Although withholding information from someone who would find that information painful is sometimes justified, there is no such justification if the person would benefit from having the information
Ttherefore, even though it would be painful for Jason to learn that his supervisor is displeased with his work, his colleague Jane should nonetheless inform Jason of this fact, for knowing that his supervisor was displeased would enable Jason to improve his supervisor' s opinion of his work
If Jane does not tell Jason that his supervisor is displeased with his work, then Jason's situation will worsen.