Raspberry Pi segmentation fault - Python -


i have program on raspberry pi written on python use control 2 motors. here of code :

def fullleft() :     speed1 = motor1speed     speed2 = motor2speed     setmotor1speed(100)     setmotor2speed(-100)     while io.input(forward1control) , io.input(backward2control) :             print( "%d : %d" %(motor1speed,motor2speed))     stop()     setmotor1speed(speed1)     setmotor2speed(speed2)     print("left done")  def fullright() :     speed1 = motor1speed     speed2 = motor2speed     setmotor1speed(-100)     setmotor2speed(100)     while io.input(forward2control) , io.input(backward1control) :             print( "%d : %d" %(motor1speed,motor2speed))     stop()     setmotor1speed(speed1)     setmotor2speed(speed2)     print("right  done")  def stop () :     io.output(forward1out,false)     motor1forward.stop()     io.output(backward1out, false)     motor1backward.stop()     io.output(forward2out, false)     motor2forward.stop()     io.output(backward2out, false)     motor2backward.stop()     global motor1speed     motor1speed = 0     global motor2speed     motor2speed = 0

everything worked before introduce stop() function on fullright() method. problem fullleft() works after 2nd while loop on fullright() function, have error segmentation fault , program crashes. don't know , why happening. can me figure out problem is...


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