gistfile1.txt

/*
produce the error

Shader error in 'Custom/UV2Test': declaration of "_MainTex_ST" conflicts with previous declaration at (48) at line 49
*/

Shader "Custom/UV2Test" {
	Properties {
		_MainTex ("Base (RGB)", 2D) = "white" {}
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
		LOD 200
		
		CGPROGRAM
		#pragma surface surf Lambert

		sampler2D _MainTex;

		struct Input {
			float2 uv_MainTex;
			float2 uv2_MainTex;
		};

		void surf (Input IN, inout SurfaceOutput o) {
			half4 c = tex2D (_MainTex, IN.uv_MainTex);
			o.Albedo = c.rgb;
			o.Alpha = c.a;
			o.Emission = float3(IN.uv2_MainTex.x,IN.uv2_MainTex.y,0);
		}
		ENDCG
	} 
	FallBack "Diffuse"
}