Shaders may inject "invariant" after smooth resulting in an error

vrend_compile_shader: context error reported 5 "Xorg" Illegal shader 0
shader failed to compile
0:3(1): error: interpolation qualifiers must come after "precise" or "invariant"

fs: 25909 GLSL:
   1: #version 140
   2: #extension GL_ARB_shader_bit_encoding : require
   3: smooth  invariant   in  vec4 vso_g9A0_f;
   4: out vec4 fsout_c0;
   5: out vec4 fsout_c1;
   6: out vec4 fsout_c2;