When using the Hans Kendrick font with SDL2_ttf;

    #include <stdio.h>
    #include <SDL2/SDL.h>
    #include <SDL2/SDL_ttf.h>

    // Very shortened for demo purposes
    int main () {
        if (SDL_Init(SDL_INIT_VIDEO) != 0) { return 1; }
        if (TTF_Init() == -1) { return 1; }

        TTF_Font *font = TTF_OpenFont("font.ttf", 28);

        if (font == NULL) { return 1; }

        SDL_Color blank = {0, 0, 0, 0};
        SDL_Color colour = {0, 0, 0, 0};

        TTF_RenderUTF8_Shaded(font, "Y", colour, blank);
    }

valgrind reports an error;

    ==18109== Invalid read of size 1
    ==18109==    at 0x535812C: TTF_RenderUTF8_Shaded (in /usr/lib/libSDL2_ttf-2.0.so.0.10.2)
    ==18109==    by 0x40080B: main (in /home/joshua/fontbug/test)
    ==18109==  Address 0xd9aaf4f is 1 bytes before a block of size 560 alloc'd
    ==18109==    at 0x4C28730: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
    ==18109==    by 0x4ED91FB: ??? (in /usr/lib/libSDL2-2.0.so.0.2.1)
    ==18109==    by 0x5357F00: TTF_RenderUTF8_Shaded (in /usr/lib/libSDL2_ttf-2.0.so.0.10.2)
    ==18109==    by 0x40080B: main (in /home/joshua/fontbug/test)

and some systems crash. This depends on the characters (strings with a space at the front have never had this problem) and possibly the font size.

---

This is pretty much copied verbatim from my Stack Overflow post on the same issue:

http://stackoverflow.com/questions/25369043/ttf-renderutf8-shaded-invalid-read?noredirect=1#comment39563751_25369043