id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
9602	Unexpected ABI change in boost::interprocess::rbtree_best_fit	kevin.arunski@…	Ion Gaztañaga	"Copied from the boost-users mailing list.  This is in relation to the change in the binary representation of boost::interprocess::rbtree_best_fit between boost 1.53 and boost 1.55.

This problem was observed in MSVC 2012 x86-64 builds.

El 22/01/2014 22:06, Arunski, Kevin escribió: 
> boost::interprocess::rbtree_best_fit<boost::interprocess::null_mutex_family,boost::interprocess::offset_ptr<void,__int64,unsigned __int64,0>,0> 
> 
> has size = 56 
> member m_header.m_imultiset has size 32 
> 
> In code compiled with boost 1.55: 
> 
> the same type has size = 72 
> member m_header.m_imultiset has size 48 

Wow, that's too big. I think this is related with MSVC Empty Base 
Implementation behaviour. I refactored those classes to avoid redundant 
simple forwarding functions using inheritance and that broke this for 
MSVC compilers. I should add some checks for 32 and 64 bit compilers to 
guarantee the minimum size (16 bytes in 32 bit and 32 bytes in 64 bit). 
Please, fill a new ticket in Boost Trac so that I don't forget this bug. 
And thanks for the report. 
Ion "	Bugs	closed	To Be Determined	intrusive	Boost 1.55.0	Regression	fixed