SKIP: FAILED fn modf_d62477() { var arg_1 : vec2; var res : vec2 = modf(vec2(), &(arg_1)); } [[stage(vertex)]] fn vertex_main() { modf_d62477(); } [[stage(fragment)]] fn fragment_main() { modf_d62477(); } [[stage(compute)]] fn compute_main() { modf_d62477(); } Failed to generate: error: Unknown import method: modf