Output from rustc:
error: unknown start of token: /
 --> <stdin>:1:1
  |
1 | /__________pkt->size___________/          /_result->size_/ /__pkt->size__/
  | ^

warning: Invalid doc comment starting with: `/__________pkt->size___________/          /_result->size_/ /__pkt->size__/`
(Ignoring this codeblock)