099 Geometry Shader error C7621

Hey All
I have a strange problem in build 2917.15400

I`m changed a build of TD and my shader stopped to work,
I using a texelfetch call, so
compiler says me:

Geometry Shader Compile Results: 0(44) : error C7531: global function texelFetchBuffer requires "#extension GL_EXT_gpu_shader4 : enable" before use

After I add this directive to the shader i get the following error:

error C7621: #extension directive must occur before any non-preprocessor token

texelFetchBuffer is a legacy function, you should use just texelFetch() for modern GLSL. I’ll look into why it broke in the new build, but to be future-proof you’ll just want to change your code to texelFetch()

What was the previous version you were using? Did you happen to upgrade your graphics drivers or change any other settings in the file?