1### Compilation failed:
2
3error: 1: 'main' must return: 'vec4', 'float4', or 'half4'
4void main() {
5^^^^^^^^^^^
6error: 6: unknown identifier 'sk_FragColor'
7            if (x < 1) { sk_FragColor = half4(half(x)); break; }
8                         ^^^^^^^^^^^^
92 errors
10