STM32F4 hangs up issue

[Admsher]

I am trying to run a loop function which receives continuous CAN data from motor , but when i start the motor, the program seems to hang up , is there any particular thing i should be looking for , the code is similar to this : stm32f4xx-hal/examples/can-send.rs at master · stm32-rs/stm32f4xx-hal (github.com)
with some calculations in between inside the loop. Any help is appreciated.