AMD glLinkProgram crash

Just for general information. I caused the AMD driver to crash in glLinkProgram with the following code


vec4  Tuflow_Frag(vec2 p_ST, vec4 p_Colour)
{
  ivec2 st = ivec2(floor(p_ST.st));
  // fetch results colour
  vec4 tuflow_colour = texelFetch(u_Tuflow_Texture,st,0);
  // blend with background colour
  if (tuflow_colour.xyz == vec3(0,0,0))
    tuflow_colour = p_Colour;
  else
  {
  tuflow_colour.xyz = mix(p_Colour.xyz,tuflow_colour.xyz,p_Colour.w);
  tuflow_colour.w = p_Colour.w;
  }

  return tuflow_colour;

  if (st.x < 0)
    return vec4(1,0,0,1);
  else if (st.x < 1)
    return vec4(0,p_ST.s,0,1);
  else if (st.x < 2)
    return vec4(0,0,1,1);
  else 
    return vec4(1,1,1,1);
}


The problem was resolved by removing the un-used code after the first return statement.

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