Original file and fixed file.
Just update the avr compiler to the current one that Arduino uses for itself.
In Arduino settings just use:
instead of the Digidump one: http://digistump.com/package_digistump_index.json
Alternative: $ cd ~/Library/Arduino15/packages/arduino/tools/avr-gcc $ mv 4.8.1-arduino5 4.8.1-arduino5.bak $ ln -s /Applications/Arduino.app/Contents/Java/hardware/tools/avr 4.8.1-arduino5