OpenSSL::SSL::SSLContext difficulty in assigning ciphers #3100

Minimal reproduction:

OpenSSL::SSL::SSLContext.new.tap { |c| c.ciphers = c.ciphers }

In MRI (2.1.6), this works, but in JRuby 1.7.19 this fails with

OpenSSL::SSL::SSLError: no cipher match
  ciphers= at org/jruby/ext/openssl/SSLContext.java:462

The background is that I am working on excluding certain ciphers from the default cipher set and am having difficulty assigning #ciphers= to a subset of itself.