SKIP: FAILED #version 310 es precision mediump float; int x_1[1] = int[1](0); void main_1() { int x_3 = x_1[0]; return; } struct tint_symbol_2 { uint x_1_param; }; void tint_symbol_inner(uint x_1_param) { x_1[0] = int(x_1_param); main_1(); } void tint_symbol(tint_symbol_2 tint_symbol_1) { tint_symbol_inner(tint_symbol_1.x_1_param); return; } void main() { tint_symbol_2 inputs; inputs.x_1_param = uint(gl_SampleMask); tint_symbol(inputs); } Error parsing GLSL shader: ERROR: 0:26: 'gl_SampleMask' : required extension not requested: GL_OES_sample_variables ERROR: 0:26: '' : compilation terminated ERROR: 2 compilation errors. No code generated.