Error when I use stdio.h library.

My process not run and jump to FaultISR() function of tm4c123gh6pm_startup_ccs.c file. Before debugging, I built and not have errors. So anyone can help me how to use sprintf() function.

My code below 

#include <stdio.h>

char * __restrict Temp;

char * __restrict varI;

char varX = 65;
char temp[3];

int main(void)
{
          //
          // Configuring system's clock.
          // System's clock = 50Mhz.
          //
          SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ | SYSCTL_OSC_MAIN);

          // initLCD();

          varI = &varX;

           Temp = &temp[0];

           sprintf(Temp, "%02d", varI);

            while(1)
            {
                  ;
             }
            return 0;
}