From: ko1@...
Date: 2015-01-01T00:35:20+00:00
Subject: [ruby-core:67270] [ruby-trunk - Bug #10686] Memory leaking from torture test of symbol GC

Issue #10686 has been updated by Koichi Sasada.


Confirming code:

```ruby
require 'objspace'
require 'pp'

def sym_num; Symbol.all_symbols.size; end
x = 0
loop {
  (x += 1).to_s.to_sym
  if (x % 1000_000) == 0
    pp ObjectSpace.count_objects
  end
}
```

We can see that T_STRING is increasing.


----------------------------------------
Bug #10686: Memory leaking from torture test of symbol GC
https://bugs.ruby-lang.org/issues/10686#change-50734

* Author: Charles Nutter
* Status: Open
* Priority: Normal
* Assignee: 
* Category: core
* Target version: current: 2.2.0
* ruby -v: 2.2p0
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
----------------------------------------
The following code appears to grow without bounds when running on MRI 2.2p0 (and grows *very* fast...hold on to your RAM):

```
x = 0; loop { (x += 1).to_s.to_sym }
```

I asked ko1 about this on Twitter and he said it appears to be leaking strings somewhere.



-- 
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