merge revision(s) 63309:
thread_sync.c (condvar_ptr): reset fork_gen after forking Otherwise the condition variable waiter list will always be empty, which is wrong :x [Bug #14725] [Bug #14634]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67259 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 63309:
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67259 b2dd03c8-39d4-4d8f-98ff-823fe69b080e