rubinius: Can't install/upgrade through RVM

Problem

I’m trying to upgrade rbx-3.30 to rbx-3.60 through the latest RVM (both stable and head) on a Debian machine.

I had three errors related to missing gems (iirc they were redcard, rubinius/code/trigger and melbourne) that I solved by installing them in ruby-2.3.1.

But still, after these errors went away, the installation didn’t proceed because of an error by melbourne.

How to Reproduce

$ rvm upgrade rbx-3.30 rbx-3.60

But right now I can’t even run $ rvm install rbx-3.60 as I get the same error every time.

Configuration Details

▶ uname -a
Linux ns319168.ip-91-121-209.eu 3.14.32-xxxx-grs-ipv6-64 #1 SMP Sat Feb 7 11:35:27 CET 2015 x86_64 GNU/Linux

▶ rvm -v
rvm 1.27.0 (master) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]

▶ rvm list

rvm rubies

   rbx-2.5.8 [ x86_64 ]
=* rbx-3.30 [ x86_64 ]
   ruby-2.2.0 [ x86_64 ]
   ruby-2.3.1 [ x86_64 ]

Stack Trace

https://gist.github.com/RoxasShadow/f28cfb9269b41c49456c4dee163e8b71