OpenGL "glGenBuffers' cause segmentation fault

I am not sure what's going on, this was working before and all of a sudden it's just acting really crazy on me.

this is a cmake and sdl project. cmakelists.txt

PROJECT(ren_opengl)

SET(SRC_FILES ren_opengl.c)
set(CMAKE_MACOSX_RPATH 1)

FIND_PACKAGE(SDL2 REQUIRED)
INCLUDE_DIRECTORIES(${SDL2_INCLUDE_DIR})

FIND_PACKAGE(OPENGL REQUIRED)
INCLUDE_DIRECTORIES( ${OPENGL_INCLUDE_DIR})

ADD_EXECUTABLE(ren_opengl ${SRC_FILES})
TARGET_LINK_LIBRARIES(ren_opengl ${SDL2_LIBRARY} ${OPENGL_LIBRARIES})

included headers

#include <SDL2/SDL.h>
#include <OpenGL/gl3.h>
#include <SDL2/SDL_opengl.h>

Init SDL in ren_opengl.c

int init_sdl(int width, int height, char* title, double fps)
{

if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
  {
    SDL_Log("sdl failed to init");
    SDL_Quit();
    return -1;
  }

    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);

    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);


  window = SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, width, height, SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN);
  if(window == NULL)
  {
    SDL_Log("sdl failed to create window");
    SDL_Quit();
    return -1;
  }

  maincontext = SDL_GL_CreateContext(window);
  if(maincontext == NULL)
  {
    SDL_Log("sdl failed to create opengl context");
    SDL_Quit();
    return -1;
  }
    SDL_GL_SetSwapInterval(1);


  return 1;

}

at the end of init sdl everything is working, I ca

void render()
{
    glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    SDL_GL_SwapWindow(window);
}

if I create a GLuint vao; that causes no problems, as soon as I try to do glGenBuffers(1, &vao); That line above keeps giving segmentation fault.

I even just updated to sdl 2.0.4 but i am really not sure what's going on now.

via Chebli Mohamed