After a recent ubgrade I got the following erorr when trying to launch Chromium:

/usr/lib/chormium/chromium: relocation error: 
/usr/lib/chromium/chromium: symbol ci_int, version 
LIBPCI_3.0 not defined in file with link time 

Googling the error lead me to a Reddit thread with a workaround.

Downgrading pciutils (v3.5.0-1) worked for me (chromium-50.0.2661.94-1).

Check your current versions:

$ pacman -Qi pciutils
Name	: pciutils
Version	: 3.5.0-1

Check available package cache:

$ ls /var/cache/pacman/pkg | grep pciutils

Downgrade package:

# pacman -U 

Savagezen's Blog

A minimalist guide to my many projects.