Since new version of 1.7.9 I get the error during bundle:
Invalid gemspec in [/home/bamboo/blau-gemcache/jruby/1.8/specifications/webmock-1.7.9.gemspec]: Illformed requirement ["#<YAML::Yecht::DefaultKey:0x5dfd35> 0.7.15"]
This issue does not happen under mri 1.9.3 and rubygems version 1.8.10, but I can reproduce it with jruby-1.6.2 and mri 1.8.7.
Looks like problem a with jruby http://stackoverflow.com/questions/8674480/rails-3-2-on-jruby-gemspec-errors
@bblimke -- this tends to happen when you build the gem on a ruby interpreter that has psych installed (i.e. 1.9.2 or 1.9.3). I've done this a couple times with VCR, and for this reason, I've got a guard to ensure I always build VCR on 1.8.7. RSpec has something similar.
So...my suggestion is to yank 1.7.9, and then build 1.7.10 on 1.8.7 and release it.
Thanks Myron. I didn't know about this issue. 1.7.10 is released now.