I got it from <https://forum.nim-lang.org/t/3752#43859>
to test for the existence of a module. That test is necessary as a user from Japan wants to use libnice with gintro on windows, without having full GTK installed. That test is fine when there are zero errors in that module, but it gives strange bugs if there is an error. This behaviour is the reason for <https://forum.nim-lang.org/t/7212> I just did a few tests, and it leads to various crashes -- crashes of the Nim compiler with segfault or crashes of the gcc. Well, at least it is not a real problem with my own code.
