Is where are additional instructions for building 2.8?

For now I can build blender from master brunch, and it works fine. But I have troubles with 2.8 version - it builds, but not run. It shows me this error when I try to launch blender:

terminate called after throwing an instance of 'std::logic_error'
  what():  basic_string::_M_construct null not valid

I’m using ubuntu 18.04 and Qt Creator. I set up all like it described here:

So I in menu select git -> local storage -> branches, select 2.8 branch here, when in the menu git -> fetch. When I build, and it always build with success, but show a lot of warnings like

I don’t think that is critical, so I just ignore this.

When i try to run blender, but it crashes with error, that I described in the beginning.

So, maybe i’m doing something wrong? Maybe i can read how