Arduino: 1.8.9 (Linux), Board: "Arduino/Genuino Uno"

In file included from /opt/arduino/hardware/arduino/avr/cores/arduino/Arduino.h:257:0,
                 from /opt/arduino/hardware/arduino/avr/libraries/SoftwareSerial/src/SoftwareSerial.cpp:43:
/opt/arduino/hardware/arduino/avr/libraries/SoftwareSerial/src/SoftwareSerial.cpp: In member function 'void SoftwareSerial::begin(long int)':
/opt/arduino/hardware/arduino/avr/variants/standard/pins_arduino.h:74:39: warning: comparison is always true due to limited range of data type [-Wtype-limits]
 #define digitalPinToPCICR(p)    (((p) >= 0 && (p) <= 21) ? (&PCICR) : ((uint8_t *)0))
                                       ^
/opt/arduino/hardware/arduino/avr/libraries/SoftwareSerial/src/SoftwareSerial.cpp:319:7: note: in expansion of macro 'digitalPinToPCICR'
   if (digitalPinToPCICR(_receivePin)) {

       ^
/opt/arduino/hardware/arduino/avr/variants/standard/pins_arduino.h:74:39: warning: comparison is always true due to limited range of data type [-Wtype-limits]
 #define digitalPinToPCICR(p)    (((p) >= 0 && (p) <= 21) ? (&PCICR) : ((uint8_t *)0))
                                       ^
/opt/arduino/hardware/arduino/avr/libraries/SoftwareSerial/src/SoftwareSerial.cpp:360:6: note: in expansion of macro 'digitalPinToPCICR'
     *digitalPinToPCICR(_receivePin) |= _BV(digitalPinToPCICRbit(_receivePin));

      ^
libraries/SoftwareSerial/SoftwareSerial.cpp.o (symbol from plugin): In function `SoftwareSerial::read()':
(.text+0x0): multiple definition of `__vector_5'
sketch/AR488_Hardware.cpp.o (symbol from plugin):(.text+0x0): first defined here
collect2: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino/Genuino Uno.

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