This bug report was migrated from our old Bugzilla tracker.

Reported in version: 2.0.12
Reported for operating system, platform: Linux, x86_64

Comments on the original bug report:

On 2014-08-18 20:45:26 +0000, Joshua Landau wrote:

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

On 2014-08-20 04:21:53 +0000, Sam Lantinga wrote:

Thanks for the bug report. If the font is freely available, can you post a link to it, or attach it to this bug?

Can you rebuild SDL_ttf with debug symbols so you can get line number information?

Does it happen with the latest version from Mercurial?

On 2014-09-05 07:22:36 +0000, Joshua Landau wrote:

This doesn't happen with the latest SDL2_ttf from Mercurial and I no longer need a solution, so I doubt much needs following up on.

I guess I'll probably revisit this in a year or so to check.

FWIW, the font is available here:
http://openfontlibrary.org/en/font/hans-kendrick

On 2017-09-10 06:03:29 +0000, Sam Lantinga wrote:

It sounds like this has been fixed.

Thanks!