Can't work with FreeRTOS

[liyinze1]

Hi, it cannot work with FreeRTOS

libraries\Low-Power\LowPower.cpp.o (symbol from plugin): In function `LowPowerClass::idle(period_t, adc_t, timer4_t, timer3_t, timer1_t, timer0_t, spi_t, usart1_t, twi_t, usb_t)':
(.text+0x0): multiple definition of `__vector_12'
libraries\FreeRTOS\port.c.o (symbol from plugin):(.text+0x0): first defined here
collect2.exe: error: ld returned 1 exit status
exit status 1