Assertion Failed

[evanb3075]

I am by no mean good at C++ and have no idea what this means and how to fix it.
Assertion Failed!
Program: C:\Users\Evan\Desktop\1520450767.dll
File: src\DataChannel.cpp
Line: 598

Expression:
std::dynamic_pointer_cast<PackageMapSniffer>(connection->pkg_map)->is_guid_registered(netguide)

Can someone please help with a way to fix this. I've already tried reinstalling Ms Vis C++ 2015 and the program that is crashing. Thx

[Thomas1965]

One possibility is that a function is called with wrong parameters.
Assertions are often used the check the pre-conditions of code.
However it could also be sth. else.
Without seeing the code it's impossible to tell what went wrong.

I've already tried reinstalling Ms Vis C++ 2015 and the program that is crashing. Thx

It has nothing to do with Visual Studio. Assertions are raised from the app or maybe the runtime libraries.

[helios]

If the object pointed to by connection->pkg_map is not an instance of PackageMapSniffer, std::dynamic_pointer_cast() will return a null pointer. Attempting to dereference it with -> may cause an assertion failure.
A simple fix may be to just do

auto casted = std::dynamic_pointer_cast<PackageMapSniffer>(connection->pkg_map);
if (casted)
    casted->is_guid_registered(netguide);

Although if the developer wrote that line like that, perhaps they were expecting the object to be of the correct type, and if it's not then that could point to a bug somewhere else. It's difficult to say.