id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
13393	[scope_exit] (Boost >= 1.65) VS 2015 internal compiler error in lambda	Tobias Loew	Lorenzo Caminiti	"Hi, 

starting from Boost version 1.65 and using VS 2015 Update 3 (MSVC 19.00) the 
following code 

int main() { 
    auto check_property = []() { 
        int test = 0; 
        BOOST_SCOPE_EXIT(test) { 
            test = 42; 
        }BOOST_SCOPE_EXIT_END 
    }; 

    return 0; 
} 


raises an internal compiler error: 
fatal error C1001: An internal error has occurred in the compiler. 
(compiler file 'msc1.cpp', line 1468). 
With earlier Boost versions it compiles fine. 


I figured out that the problem is in <boost/typeof/typeof.hpp>. 
Since commit 12e1fe615a34c9a5e6ebe3ddf629c6491a50aa9d (DanielaE committed on 
Apr 14, 2017) in line 214 ff VS 2015 (w/o explicit #defines)  includes 
<boost/typeof/decltype.hpp>. 
Before the commit VS 2015 included <boost/typeof/native.hpp>. 

It seems that VS 2015 has problems in lambda when 
<boost/typeof/decltype.hpp> is included. 

Unfortunately, the only way getting back the old behavior was defining 
BOOST_NO_CXX11_DECLTYPE or BOOST_NO_CXX11_TEMPLATE_ALIASES, but this would 
have major side-effects. 

I would propose a new macro called BOOST_TYPEOF_MSVC_NATIVE such that when 
defined <boost/typeof/native.hpp> is included. 


A working solution is replacing lin 18 in <boost/typeof/typeof.hpp> by 

#if !defined(BOOST_TYPEOF_MSVC_NATIVE) && !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) && !defined(BOOST_TYPEOF_EMULATION)

Tobias"	Bugs	closed	To Be Determined	scope_exit	Boost 1.65.0	Problem	fixed