Issue #16608 has been updated by ko1 (Koichi Sasada).


Previous dev-meeting (March), there is no objection to change the return value of `Mutex#sleep`.

> matz: agreed to change the return value of Mutex#sleep.
> naruse: agreed to change in Ruby 3.1 because this is so detail

Congrats!

----------------------------------------
Bug #16608: ConditionVariable#wait should return false when timeout exceeded
https://bugs.ruby-lang.org/issues/16608#change-91579

* Author: shugo (Shugo Maeda)
* Status: Assigned
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
The following program prints `false` on Ruby 1.8, but `true` on Ruby 1.9 or later.

```
require "monitor"
m = Monitor.new
c = m.new_cond
m.synchronize { p c.wait(0.1) }
```

However, it's not critical because most programs check the condition after wait.



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