[Mesa-dev] [Bug 74010] mesa-10.0.2: z-buffer issue with opengl 3.3 context on intel

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74010

--- Comment #3 from Evgeny Bobkin <evgen.ibqn at gmail.com> ---
another issue is that if there two lines

    glGenVertexArrays (1, &vao_id);
    glBindVertexArray (vao_id);

from lines 46-47 are removed and the cube is drawn with

    glEnableVertexAttribArray (position_id);
    glBindBuffer (GL_ARRAY_BUFFER, vertex_buffer);
    glVertexAttribPointer (position_id, 3, GL_FLOAT, GL_FALSE, 0, nullptr);

    glEnableVertexAttribArray (color_id);
    glBindBuffer (GL_ARRAY_BUFFER, color_buffer);
    glVertexAttribPointer (color_id, 3, GL_FLOAT, GL_FALSE, 0, nullptr);

    glDrawArrays (GL_TRIANGLES, 0, 36);


instead of

    glBindVertexArray (vao_id);
    glDrawArrays (GL_TRIANGLES, 0, 36);

the test case app breaks with a segmentetion fault while using opnegl 3.3
context, however both ways work just fine with the old created context!!

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