OpenSSL::X509::Store behaves differently on MRI

[mkristian]

setting custom SSL_CERT_FILE

$ SSL_CERT_FILE=nothing ruby -v -r openssl -e 'OpenSSL::X509::Store.new.set_default_paths'
ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-darwin14]

versus

$ SSL_CERT_FILE=nothing bin/ruby -v -r openssl -e 'OpenSSL::X509::Store.new.set_default_paths'
jruby 9.0.2.0-SNAPSHOT (2.2.2) 2015-09-10 9ceb2fe Java HotSpot(TM) 64-Bit Server VM 25.51-b03 on 1.8.0_51-b16 +jit [darwin-x86_64]
OpenSSL::X509::StoreError: setting default path failed: NotFound
  set_default_paths at org/jruby/ext/openssl/X509Store.java:185
              <top> at /Users/cmeier/projects/active/jruby/lib/ruby/stdlib/jopenssl/load.rb:25
            require at org/jruby/RubyKernel.java:939
             (root) at /Users/cmeier/projects/active/jruby/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:1
              <top> at /Users/cmeier/projects/active/jruby/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:54
            require at org/jruby/RubyKernel.java:939
             (root) at /Users/cmeier/projects/active/jruby/lib/ruby/stdlib/openssl.rb:1

the OpenSSL::X509::DEFAULT_CERT_FILE from the above MRI-2.2.3 is /usr/local/etc/openssl/cert.pem and does NOT exists. using this via SSL_CERT_FILE just works with MRI but fails with jruby-openssl-0.9.11.

that is add on to: #49