Comment 1 for bug 1491526

I've seen similar build failures as well. I investigated a bit and came up with a hunch/theory about the underlying cause. I noticed that Debian had updated rspec to 3.x while Ubuntu was still using 2.x (since some new build dependencies for rspec weren't in main) and it didn't seem too unreasonable that this might affect the outcome of the tests.

I don't have any solid proof for this theory, but the build dependencies have been sorted out and ruby-rspec 3.3.0c0e0m0s0-1build1 is now available on Ubuntu Wily. I attempted a build locally, and I was successfully able to build jruby 1.7.21-2ubuntu4 so it looks like this issue has been sorted out. I will try to poke someone to trigger a rebuild in the Ubuntu archives.