minitest/autorun raises on jruby9000

[jrochkind]

$ java -version
java version "1.7.0_75"
OpenJDK Runtime Environment (IcedTea 2.5.4) (7u75-2.5.4-1~precise1)
OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode)
$ javac -version
javac 1.7.0_75
$ ruby --version
jruby: warning: unknown property jruby.cext.enabled
jruby 9.0.0.0-SNAPSHOT (2.2.0p0) 2015-02-05 c804f97 OpenJDK 64-Bit Server VM 24.75-b04 on 1.7.0_75-b13 +jit [linux-amd64]

require 'minitest/autorun'

in source seems to result in:

LoadError: load error: minitest -- java.lang.ClassCastException: java.lang.String cannot be cast to org.jruby.runtime.builtin.IRubyObject

require at org/jruby/RubyKernel.java:964
(root) at /home/travis/.rvm/gems/jruby-head/gems/minitest-5.5.1/lib/minitest/autorun.rb:8
require at org/jruby/RubyKernel.java:964
(root) at /home/travis/build/traject-project/traject/test/test_helper.rb:1
require at org/jruby/RubyKernel.java:964
(root) at /home/travis/build/traject-project/traject/test/test_helper.rb:2

This is just from travis output I haven't debugged further than that, but my test_helper.rb:2 is require 'minitest/autorun'.

[jrochkind]

(Also I dunno what's with jruby: warning: unknown property jruby.cext.enabled, that's appearing multiple times in travis output, but that's a different issue, and just a warning)

[jrochkind]

Also each line of stack trace reported by Travis has a bunch (90?) chars of space at the beginning of the line, which I had to edit out to paste in here readably. Different issue again, of course.

[jrochkind]

Weirdly, this did not happen again on second try. Something weird with travis jruby-head setup, or since it's getting 'head' perhaps there was another commit which resolved a mistake. Anyway, I think this can be closed.

[subbuss]

Please see discussion on #2491 and try on latest master, and can you confirm that this problem is fixed for you? Please reopen if not.

[jrochkind]

Thanks. For the record, for me my tests failed with above error output on c804f97 but were passing again next time travis ran, using a5fedf5. I don't know what was up other than that.