introduce debug check.
There are random failures:
lib/rubygems/core_ext/kernel_require.rb:61:in `require': wrong number of arguments (given 1, expected 0) (ArgumentError) http://ci.rvm.jp/results/trunk-jemalloc@silicon-docker/2275159
To check this failure, I added a small check code.
introduce debug check.
There are random failures:
To check this failure, I added a small check code.