SKIP: FAILED fn modf_f9f98c() { var arg_1 : vec3; var res : vec3 = modf(vec3(), &(arg_1)); } [[stage(vertex)]] fn vertex_main() { modf_f9f98c(); } [[stage(fragment)]] fn fragment_main() { modf_f9f98c(); } [[stage(compute)]] fn compute_main() { modf_f9f98c(); } Failed to generate: error: Unknown import method: modf