Re: [Boost-bugs] [Boost C++ Libraries] #10954: boost::spirit::iterator_policies::split_std_deque memory leak on reference count

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #10954: boost::spirit::iterator_policies::split_std_deque memory leak on reference count
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-12-10 15:21:55

#10954: boost::spirit::iterator_policies::split_std_deque memory leak on reference
count
-------------------------+-------------------------------------------------
  Reporter:              |      Owner:  Joel de Guzman
  daniel.f.starke@…      |
      Type:  Bugs        |     Status:  new
 Milestone:  To Be       |  Component:  spirit
  Determined             |
   Version:  Boost       |   Severity:  Problem
  1.57.0                 |   Keywords:  iterator memory leak spirit
Resolution:              |  multi_pass
-------------------------+-------------------------------------------------

Comment (by Nikita Kniazev <nok.raven@…>):

 I can confirm the problem.

 `Once the iterator count goes down to one, and the queue is no longer
 needed, it is cleared, freeing up memory` - actually both of statements
 found in documentation are violated:
   1. The queue is not cleared in this case (but manual `clear_queue()`
 works)
   2. Because `split_std_deque` is actually implemented on top of
 `std::vector` it does not return memory to system upon calling `clear()`
 (the `shrink_to_fit()` call appeared only on C++11)

-- 
Ticket URL: <https://svn.boost.org/trac10/boost/ticket/10954#comment:1>
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