id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
8414,flyweights causes weird library initialization error,charles quarra <charlls_quarra@…>,Joaquín M López Muñoz,"
the bug is reproduced with the following test case:

g++ main.cpp -o xmain  -ldl

main.cpp:
#include <dlfcn.h>
#include <iostream>
int
main()
{
    std::cout << ""load: "" << std::endl;
    void *foo = dlopen(""./libpluginTest.so"", RTLD_NOW);
    std::cout << ""load: library loaded ""<< foo << std::endl;
    if (dlclose(foo) < 0) {
        std::cout << ""load: library close failed "" << std::endl;
        return 1;
    }
    std::cout << ""load: library closed "" << std::endl;
    return 0;
}

---
g++ -I/path/to/boost/includes -fPIC -shared -rdynamic test_plugin.cpp -o libpluginTest.so -L/path/to/boost/libs -lrt

test_plugin.cpp:
#include <iostream>
//#include <boost/flyweight/intermodule_holder.hpp>
#include <boost/flyweight.hpp>

typedef boost::flyweight< std::string > SymbolName_t;

SymbolName_t getEmptyStringSymbol() {
            SymbolName_t empty("""");
            return empty;
        }

void __attribute__ ((constructor)) library_init()
{
  std::cout << ""Library constructor: "" << std::endl;
}
void __attribute__ ((destructor)) library_fini()
{
  std::cout << ""Library destructor:"" << std::endl;
}


this program outputs the following:


load: 
Library constructor: address of static cbContainer is: 
load: library loaded 0x1226030
load: library closed 
Library destructor:

as this shows, the library destructor is called at program termination, and NOT before dlclose returns, which is the expected behavior. 
If we comment the function 'getEmptyStringSymbol',  the resulting output is:

load: 
Library constructor: address of static cbContainer is: 
load: library loaded 0x1b0b030
Library destructor:
load: library closed 

which is the expected behavior

this bug has been reproduced on the following compilers:

g++-4.6 (Ubuntu/Linaro 4.6.3-10ubuntu1) 4.6.3 20120918 (prerelease)
g++-4.7 (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2
",Bugs,closed,To Be Determined,flyweight,Boost 1.53.0,Showstopper,invalid,,