[paweln]

You can, just follow these simple, but detailed instructions for Ubuntu users for upgrading vim: https://github.com/Valloric/YouCompleteMe/wiki/Building-Vim-... To not mess with system-installed vim: remove --prefix option and VIMRUNTIMEDIR, then build and install with sudo make install, which will put the files in /usr/local.

[UncleBill]

Why must Vim 7.3.584+?

[roller]

Here's the FAQ straight from the docs:

Why does YCM demand such a recent version of Vim? ~

During YCM's development several show-stopper bugs where encountered in Vim. Those needed to be fixed upstream (and were). A few months after those bugs were fixed, Vim trunk landed the 'pyeval()' function which improved YCM performance even more since less time was spent serializing and deserializing data between Vim and the embedded Python interpreter. A few critical bugfixes for 'pyeval()' landed in Vim 7.3.584 (and a few commits before that).