When I try to start the launcher, I don't get a GUI at all. Trying to start it from the command line gives this output:

terminate called after throwing an instance of 'std::logic_error'
  what():  basic_string::_M_construct null not valid
zsh: abort (core dumped)  ./minecraft-launcher

I have straced it, I will attach a text file with the strace output to this issue. Please let me know if I need to provide more information.

This happens both with the regular AUR package and the launcher-beta AUR package - the strace output is from the beta one.