Joaquin M Lopez Munoz wrote:

Two (main) possibilities: the shared_ptr is invalid or my code has a bug. Could you test the pointer for validity before making the insertion?

m.check_invariant_(); // check ptr before insertion m.insert(ptr); OK, so I print out the members of the object that the shared_ptr encapsulates, and it appears that the shared_ptr object is OK before insertion.

If still the error is detected inside insert(), we can try to produce some sort of poorman dump of the container: define BOOST_MULTI_INDEX_INVARIANT_ASSERT to throw an exception on failure and wrap the call to insert() as follows: OK, I tried to use the following code, and recompiled, but I don't catch the exception, and in turn I see rather unpredictable behavior before my program dies violently. Is my macro definition incorrect?

//************* begin **************** struct invariant_exception { invariant_exception() {} }; #define BOOST_MULTI_INDEX_INVARIANT_ASSERT(expr) \ if(!(expr)){throw invariant_exception();} //************* end *****************

try{ m.insert(...); } catch(/* exception thrown by the assert */){ // dump the contents of m }

Can you do that? Notice something weird in the dump? Can you post the dump? I will post the dump if I can get it to create one.

Thanks for your perseverance! --Ross