glDrawElements causes Access violation reading - opengl

Question

I have fixed it - working solution can be found at the bottom of the page.
I am trying to play with interleaved vbo and vao. I am testing it on a simple triangle - this is how my index data and vertex data look like:
vertex_col data[] = {
vertex_col(vec3(0.5f, 0.5f, 0.5f), vec4(0.0f, 0.0f, 1.0f, 1.0f), vec3(0.0f, 0.0f, 0.0f)),
vertex_col(vec3(-0.5f, -0.5f, -0.5f), vec4(0.0f, 1.0f, 0.0f, 1.0f), vec3(0.0f, 0.0f, 0.0f)),
vertex_col(vec3(-0.5f, 0.5f, 0.5f), vec4(1.0f, 0.0f, 0.0f, 1.0f), vec3(0.0f, 0.0f, 0.0f)),
};
GLushort indices[] = {
0, 1, 2
};
ModelLoader loader;
model = loader.loadToVAO(indices, 3, data, 3);
This is vertex_col struct:
struct vertex_col {
public:
vertex_col(const vec3& pos, const vec4& col, const vec3& normal) {
this->pos = pos;
this->colour = col;
this->normal = normal;
}
vec3 pos;
vec4 colour;
vec3 normal;
};
This is how I load the data into vao and vbo:
RawModel ModelLoader::loadToVAO(const GLushort *indices, int m, const vertex_col *vertices, int n) {
GLuint vaoID = createVAO();
GLuint vboID;
glGenBuffers(1, &vboID);
glBindBuffer(GL_ARRAY_BUFFER, vboID);
glBufferData(GL_ARRAY_BUFFER, n * sizeof(vertex_col), vertices, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_col), (void*) offsetof(vertex_col, pos));
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof(vertex_col), (void*) offsetof(vertex_col, colour));
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_col), (void*) offsetof(vertex_col, normal));
GLuint vboID_2;
glGenBuffers(1, &vboID_2);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vboID_2);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, m * sizeof(GLushort), indices, GL_STATIC_DRAW);
unbindVAO();
return RawModel(vaoID, m);
}
GLuint ModelLoader::createVAO() {
GLuint vaoID;
glGenVertexArrays(1, &vaoID);
glBindVertexArray(vaoID);
return vaoID;
}
And this is how I draw the vao:
void Renderer::render(const RawModel &model) {
shaders["basic"].use();
glBindVertexArray(model.getVaoID());
glDrawElements(GL_TRIANGLES, model.getVertexCount(), GL_UNSIGNED_SHORT, nullptr);
glBindVertexArray(0);
shaders["basic"].release();
}
The last operation causes this error 'Access violation reading location 0x00000000' and I have no idea why. Also if it is any relevant to the question, I am using libraries glew and glfw.
Fixed version:
RawModel *ModelLoader::loadToVAO(const GLushort *indices, int m, const vertex_col *vertices, int n) {
GLuint vaoID = createVAO();
GLuint vboID = 0;
glGenBuffers(1, &vboID);
glBindBuffer(GL_ARRAY_BUFFER, vboID);
glBufferData(GL_ARRAY_BUFFER, n * sizeof(vertex_col), vertices, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_col), (void*) offsetof(vertex_col, pos));
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof(vertex_col), (void*) offsetof(vertex_col, colour));
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_col), (void*) offsetof(vertex_col, normal));
vboID = 0;
glGenBuffers(1, &vboID);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vboID);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, m * sizeof(GLushort), indices, GL_STATIC_DRAW);
unbindVAO();
return new RawModel(vaoID, m);
}