uniform int n_lights;
uniform vec3 light_dir[n_lights];

#pragma MSP stage(vertex)
layout(location=0) in vec4 position;
const bool lower_half = position.y<0;
void main()
{
	gl_Position = position;
}

/* Expected error:
<test>:2: Reference to non-constant variable 'n_lights' in a constant expression
<test>:6: Reference to non-constant variable 'position' in a constant expression
*/