problem about hardware debugging of STM32 timer interrupt

I write a simple interrupt program about timer of STM32，when I debug this program with hardware debugging,it is correct if I step through the functions and there is a error if the program run at full speed. The program died at the start-up file at this moment.


I find the reason repeatedly.By searching the forums I know that one of the interrupt functions may not be implemented.I check the codes again and find the problem,



I find that interrupt of TIM3 is enabled in the NVIC and the interrupt request I have writed is about TIM2.