Re: [Quantlib-users] ObservableSettings is deleted early than Observables.

[Eric E. <eri...@re...>]

Hi Philip,

I tried unsuccessfully to recreate the error.  You did not say which 
operating system you are using but you mention "debug version" which 
sounds like visual studio so I tested it on Windows - I'm using Visual 
Studio 2019 on 64-bit WIndows 10.  I built it using "Debug (static 
runtime)" x64 and I ran ClientCppDemo and it behaves as I expected (no 
access violation).  Anything else I can try to recreate the error?

I have not examined the code but your remarks sound sensible to me.  
What resolution would you suggest?

Regards,
Eric

On 10/7/20 6:43 AM, SX L wrote:
> I was trying the Quantlib Addin. The QLADemo exits abnormally in the 
> debug version with an access violation exception. It turned out to be 
> the case that ObervableSettings is deleted earlier than some observer 
> and observables at exit. So in the dtor of the observer, 
> ObservableSettings is called to check if update is deferred, hence 
> causing the exception. I feel it's unsafe to use shared pointers 
> inside a singleton. Any suggestion? Thanks.
>
> Regards,
>
> Philip
>
>
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