[ruby/fiddle] test: ensure freeing closure
GitHub: GH-102
https://github.com/ruby/fiddle/commit/b2fef1770d
[ruby/fiddle] test: ensure freeing closure
GitHub: GH-102
https://github.com/ruby/fiddle/commit/b2fef1770d