[ruby/time] Test for quadratic backtracking on invalid time
https://hackerone.com/reports/1485501
https://github.com/ruby/time/commit/b30b7bc6e6
[ruby/time] Test for quadratic backtracking on invalid time
https://hackerone.com/reports/1485501
https://github.com/ruby/time/commit/b30b7bc6e6