Bug#682069: Installing latest version is an easy workaround

[Stephen Ostermiller]

The latest version of yui-compressor does not have this problem. It is 
easy enough to install manually from 
https://github.com/yui/yuicompressor/releases

cd /tmp/
wget 
https://github.com/yui/yuicompressor/releases/download/v2.4.8/yuicompressor-2.4.8.jar
sudo mv yuicompressor-2.4.8.jar /usr/share/yui-compressor/yui-compressor.jar

Perhaps the debian package maintainer could install version 2.4.8 
instead of whatever version currently gets installed.