1. 2016-07-28 [ruby-core:76594] [Ruby trunk Bug#12628] change block ruby-core ko1 2. 2016-07-26 [ruby-core:76577] [Ruby trunk Bug#12628] change block ruby-core matz 3. 2016-07-26 [ruby-core:76568] [Ruby trunk Bug#12628] change block ruby-core ko1