Diagnostic information for a program execution is provided, where the program is executable in a machine having a program stack for individual program elements. At least one program element is saved from the program stack into an event buffer as the at least one program element is executed. A historical event buffer associated with at least one runtime error is loaded, and a similarity between the event buffer and the historical event buffer is determined. It is requested that at least one type of diagnostic information be provided with the execution of the program in the event buffer when the determined similarity exceeds a threshold similarity.