[Boost-users] [variant] MSVC7.1 produces an Internal Compiler error when variant gets too complicated

From: Eoin (eoin-keyword-boostusers.07781a_at_[hidden])
Date: 2006-09-05 17:08:34

Hello I am developing a library which uses a variant like this one

class my_class {};

typedef boost::make_recursive_variant<
    my_class,
    int ,
    std::string,
    boost::posix_time::ptime,
    std::vector<boost::recursive_variant_>,
    std::map<std::string, boost::recursive_variant_>
    >::type param;

Under a Debug build when the type my_class is not present everything 
compiles perfectly, however with my_class I get internal compiler errors 
such as the ones below;

G:\Program Files (x86)\Microsoft Visual Studio .NET 
2003\Vc7\include\xstring(827) : fatal error C1001: INTERNAL COMPILER ERROR
        (compiler file 'msc1.cpp', line 2701)
         Please choose the Technical Support command on the Visual C++
         Help menu, or open the Technical Support help file for more 
information

c1xx : fatal error C1063: INTERNAL COMPILER ERROR
         Please choose the Technical Support command on the Visual C++
         Help menu, or open the Technical Support help file for more 
information

While playing around with the code and making adjustments (like 
reordering the types for the variant) I once got the compiler to display 
this error;

fatal error C1067: compiler limit : debug information module size exceeded

Searchs on the net pointed to using the #pragma component (mintypeinfo, 
on ) around the offending code, but even when I include this pragam 
enclosing the entire header containing my variant type I continue to get 
the Internal Compiler Error for some files, though it does go away for 
others.

As hinted to by searches on the net this problem seems to be related to 
debug information and indeed everything does work fine under a release 
build. However as I am developing a library for use by others I cannot 
force them to avoid debug builds :^) . Everything works fine with the 
lastest MinGW debug or release.

Any suggestions would be very much appreciated. Kind Regards, Eoin.