Issue #15269 has been reported by ioquatix (Samuel Williams).

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Bug #15269: Process.setproctitle has odd behaviour on Mac OS X
https://bugs.ruby-lang.org/issues/15269

* Author: ioquatix (Samuel Williams)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 2.5.1p57
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
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On Mac OS X, using `Process.setproctitle` does seem to update when inspecting the process using `ps` but doesn't seem to update the process title in `htop`.

I don't know why.

Here is my test script.

```ruby
#!/usr/bin/env ruby

Process.setproctitle "Preparing for sleep..."

10.times do |i|
	puts "Counting sheep #{i}"
	Process.setproctitle "Counting sheep #{i}"
	
	sleep 10
end

puts "Zzzzzzz"
```

If I restart `htop` it updates.




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