ClassLoader throws exception on destruction

[arneboe]

The destructor of ClassLoader crashes throwing class_loader::LibraryUnloadException.

console output:

terminate called after throwing an instance of 'class_loader::LibraryUnloadException'
  what():  Attempt to unload library that class_loader is unaware of.
Aborted (core dumped)

Minimal example to reproduce.

#include <envire_core/plugin/ClassLoader.hpp>
#include <envire_core/items/Item.hpp>
#include <octomap/AbstractOcTree.h>
using namespace envire::core;

int main(int argc, char **argv)
{

  Item<boost::shared_ptr<octomap::AbstractOcTree>>::Ptr octree;

  ClassLoader* loader = ClassLoader::getInstance();
  if(!loader->createEnvireItem("envire::core::Item<boost::shared_ptr<octomap::AbstractOcTree>>",octree))
  {
    std::cerr << "Unabled to load envire::octomap::OcTree" << std::endl;
    return -1;
  }
  return 0;
}

[arneboe]

@saarnold

[Rauldg]

Maybe is related to this one, which also occurs on destruction.

[Rauldg]

I tried to debug this: So far after setting the debug mode in compilation, the destructor fails with a different error:

At https://github.com/ros/class_loader/blob/0.3.7/src/class_loader_core.cpp#L497

It triggers:

install/include/boost/thread/pthread/recursive_mutex.hpp:113: void boost::recursive_mutex::lock(): Assertion `!pthread_mutex_lock(&m)' failed.

I think that when running in release mode the name of the loaded library in the class loader gets corrupted. That's why it can not find it, but couldn't find out when that happens.

[arneboe]

Assertions are disabled in release mode. The assert you found might be a completely different bug. Maybe it is best to open a new bug report for the assert?

[Rauldg]

Created the separated issue

[arneboe]

After fixing #39 I can no longer reproduce this bug.