Yes! Same here. Did you find out if it was your code or something else?

Hi, I'm having some issues with this kata. The code works just fine but on a random test i've got an error " free(): invalid pointer " but it doens't seem to come from the program. Would anyone have an idea on how to solve it ?

User code was not the reason here: this was a warning that was not evident when the translation was made in an earlier version of C. I have now just averted this warning.

What function exactly is not declared? Some library function, or some function implemented by you? How is it declared? You declare it explicitly, or include some header file?

I've got an issue with the declaration. It's telling me that C99 doesn't accept implicit declaration of functions. However the function is declared and on visual studio the code works just fine. Would someone know why ?