celluloid/timers — pull request #42 by LavirtheWhiolet (2014-09-09 13:26:11+00:00)
Title: Fix issue #41: Hang up when "mathn" is required

The following code buzzed:

```ruby
require 'timers'
require 'mathn'

timers = Timers::Group.new
t = timers.after(5) { puts "OK!" }
sleep(1)
t.reset
timers.wait()
```