error compiling on gcc-avr 4.6.1

Using Arduino IDE 1.x
6

I've temporarily fixed the problem by downgrading to gcc-avr 4.6.0-3. I found that I had the older version 4.6.0-3 in /var/cache/pacman/pkg ..
A simple pacman -U /var/cache/pacman/pkg/gcc-avr-4.6.1-1-x86_64.pkg.tar.xz fixed the issue.