Procs

proc dump_traceback() {....raises: [Exception, ValueError, OSError, IOError,
                                 EOFError, KeyError], tags: [RootEffect].}

proc enable() {....raises: [Exception, ValueError, OSError, IOError, EOFError,
                         KeyError], tags: [RootEffect].}

proc disable() {....raises: [Exception, ValueError, OSError, IOError, EOFError,
                          KeyError], tags: [RootEffect].}

proc is_enabled(): bool {....raises: [Exception, ValueError, OSError, IOError,
                                   EOFError, KeyError], tags: [RootEffect].}

proc register(signum: int) {....raises: [Exception, ValueError, OSError, IOError,
                                      EOFError, KeyError], tags: [RootEffect].}

proc unregister(signum: int) {....raises: [Exception, ValueError, OSError, IOError,
                                        EOFError, KeyError], tags: [RootEffect].}

proc cancel_dump_traceback_later() {....raises: [Exception, ValueError, OSError,
    IOError, EOFError, KeyError], tags: [RootEffect].}

proc dump_traceback_later(timeout: int; repeat = false) {.
    ...raises: [Exception, ValueError, OSError, IOError, EOFError, KeyError],
    tags: [RootEffect].}