Plan 9 from Bell Labs’s /usr/web/sources/contrib/nemo/octopus/module/error.m
Error: module { PATH: con "/dis/o/error.dis"; init: fn(); kill: fn (pid: int, msg: string): int; error: fn(e: string); panic: fn(e: string); checkload: fn[T](x: T, p: string): T; stderr: ref Sys->FD; };