During the source conversion a coverity instruction was moved to a double slashed comment line - may need your review to see that it works: https://github.com/codebybrett/ren-c/blob/20151117-source-conversion/src/os/posix/host-error.c#L71

If changes are required to support coverity then the parser on/around this line may need to change: https://github.com/codebybrett/ren-c/blob/20151117-source-conversion/src/tools/common-parsers.r#L148

As an aside, I believe @hostilefork has more editing before he applies the conversion to ren/c.