what is this non-sense error?

[Lindley]

A great many of the valgrind errors occur due to a call you make on line 6670 in your main() function. My guess is you've got an uninitialized value in main() somewhere.

And by the way, a file over 6000 lines long is a good indication that you aren't being as modular as you should be.

It's possible that the valgrind errors could be false positives. Sometimes code is written like this:

if (x[0] != 0)
    x[0] = 0;

and that could cause such a valgrind output without actually being dangerous. Although, I wouldn't write code that way because I believe in most cases the if statement could actually be slower than just doing the assignment.

However, you should assume there's a problem with your code until you've definitively determined that the issue isn't something you need to worry about, typically by inspecting the source of the library causing it.