hash value of enumerable should be obtained from its elements; close #1658
hash value of enumerable should be obtained from its elements; close #1658
Merge branch 'master' of github.com:mruby/mruby
Increase test coverage of mruby-struct
Merge pull request #1659 from carsonmcdonald/threestructtests

Increase test coverage of mruby-struct
implement custom GC marker for RData
remove unnecessary abort()
use RObject flag to detect custom marker