Re: [boost] Solving Robert's singleton problem

Subject: Re: [boost] Solving Robert's singleton problem
From: Robert Ramey (ramey_at_[hidden])
Date: 2018-10-18 22:24:13

On 10/18/18 2:58 PM, Peter Dimov via Boost wrote:
> Robert Ramey wrote:
> 
>> I'm quite confident that the problem will be solved in the near future 
>> just by doing the work to fix it.  It's not rocket science, it just 
>> requires investment of time and effort by someone who understands the 
>> library and C++
> 
> The problem has already been fixed, by Alexander Grund. The fix, in its 
> latest incarnation, is in #131.
> 
> To recap,
> 
> - the Serialization library crashes on exit in certain scenarios, as 
> demonstrated by the tests in #111 and #128.
> 
> - this is caused by the fact that singleton<X>::is_destroyed() always 
> returns false, as demonstrated by the test in #129.
> 
> (At extended_type_info_typeid.cpp:99, the code tests 
> singleton<tkmap>::is_destroyed(), and if false, proceeds to use 
> singleton<tkmap>::get_mutable_instance(). But since is_destroyed always 
> returns false, the check doesn't work and doesn't prevent the library 
> from accessing the destroyed tkmap in the scenario in question.)
> 
> - a fix for is_destroyed() is proposed in #131. It makes the tests from 
> #111/#128/#129 pass.

Hmmm - OK - I'll take yet another look at this.

Robert Ramey