[require]
GLSL >= 1.20

[vertex shader file]
glsl-mvp.vert

[fragment shader]
#version 120
void main()
{
    const vec3 v = inversesqrt(vec3(16.0));

    /* The following values are undefined but the compiler should not crash. */
    const float undef1 = inversesqrt(0.0);
    const float undef2 = inversesqrt(-1.0);

    gl_FragColor = vec4(v, undef1 + undef2);
}

[test]
clear color 0.0 0.0 0.0 0.0
clear
ortho
draw rect 10 10 10 10
probe rgb 15 15 0.25 0.25 0.25