Recently, Google deprecated the i386 build of Google Chrome, which means that apt not produces an error when you try to 'apt-get update'.
This is the error that you may have encountered:
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release Unable to find expected entry 'main/binary-i386/Packages' in Release file (Wrong sources.list entry or malformed file)
This is because Google has deprecated 32-bit Chrome installations. Luckily, it's easy to fix the error. Just run this command in your terminal:
sudo nano /etc/apt/sources.list.d/google-chrome.list
Modify this line:
deb http://dl.google.com/linux/chrome/deb/ stable main
To read this instead:
deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
Then you can update without the error occurring again.