OpenGL Segmentation Fault

Question

I'm following the OpenGL Programming Guide:8th edition, and I'm kind of stuck in the 1st chapter (triangles.cpp).

I'm running Ubuntu 14.04.2, and this is the code used:

// Draws 2 triangles on the screen

#include <iostream>
using namespace std;

#include "vgl.h"
#include "LoadShaders.h"

enum VAO_IDs { Triangles, NumVAOs };
enum Buffer_IDs { ArrayBuffer, NumBuffers };
enum Attrib_IDs { vPosition = 0 };

GLuint VAOs[NumVAOs];
GLuint Buffers[NumBuffers];

const GLuint NumVertices = 6;

// init

void init(void)
{
    glGenVertexArrays(NumVAOs, VAOs);
    glBindVertexArray(VAOs[Triangles]);

    GLfloat vertices[NumVertices][2] = {
        { -0.90, -0.90 }, //Triangle 1
        {  0.85, -0.90 },
        { -0.90,  0.85 },
        {  0.90, -0.85 }, //Triangle 2
        {  0.90,  0.90 },
        { -0.85,  0.90 }
    };

    glGenBuffers(NumBuffers, Buffers);
    glBindBuffer(GL_ARRAY_BUFFER, Buffers[ArrayBuffer]);
    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices),
                 vertices, GL_STATIC_DRAW);

    ShaderInfo shaders[] = {
        { GL_VERTEX_SHADER, "trianges.vert" },
        { GL_FRAGMENT_SHADER, "triangles.frag" },
        { GL_NONE, NULL }
    };

    GLuint program = LoadShaders(shaders);
    glUseProgram(program);

    glVertexAttribPointer(vPosition, 2, GL_FLOAT,
                      GL_FALSE, 0, BUFFER_OFFSET(0));
    glEnableVertexAttribArray(vPosition);
}

// display
void display(void)
{
    glClear(GL_COLOR_BUFFER_BIT);

    glBindVertexArray(VAOs[Triangles]);
    glDrawArrays(GL_TRIANGLES, 0, NumVertices);

    glFlush();
}

// main
int main (int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGBA);
    glutInitWindowSize(512, 512);
    glutInitContextVersion(4, 3);
    glutInitContextProfile(GLUT_CORE_PROFILE);
    glutCreateWindow(argv[0]);

    if (glewInit()) {
        cerr << "Unable to initialize GLEW ... exiting" << '\n';
        exit(EXIT_FAILURE);
    }

    init();

    glutDisplayFunc(display);

    glutMainLoop();
}

This code compiles successfully, but yields a Segmentation Fault on execution.

I used gdb to debug the error. A random window does pop up (only when I used gdb), but its simply displaying what's behind the window (so it's crashed, doesn't display the two triangles).

This is the output from gdb:

Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in <module>
from libstdcxx.v6.printers import register_libstdcxx_printers
ImportError: No module named 'libstdcxx'

Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()

The program should be displaying 2 triangles on a window.

I'm relatively new to C++, and I'm very new to linking libraries and debugging with gdb. I've seen many Q&A on the Segmentation Fault. A person did have the exact same problem as I did, but unfortunately, he deleted the question.

I don't really feel like this is a duplicate, since I didn't really understand most of the answers I've read on the same topic. Please make the answer as simple as possible.

I'm using the freeglut3-dev library, and I'm using NVIDIA Driver version 346.59.

EDIT: The exact error happens at init() in

glGenVertexArrays(NumVAOs, VAOs);
glBindVertexArray(VAOs[Triangles]);

Answer 1

The segmentation fault occurred at the very first command that used GL. So, I made sure to import freeglut, which included all the necessary libraries for opengl too.

#include freeglut

I would like to thank Mateusz Grzejek for pointing this out.