Dear Maintainer, It will fix with the following patch.
--- netkit-rsh-0.17/rcp/rcp.c +++ new/rcp/rcp.c @@ -889,7 +889,11 @@ fprintf(fp, "%c", 0x01); vfprintf(fp, fmt, ap); fflush(fp); - if (!iamremote) vfprintf(stderr, fmt, ap); + if (!iamremote) { + va_end(ap); + va_start(ap, fmt); + vfprintf(stderr, fmt, ap); + } va_end(ap); } Bug#366535 will also be fixed with this patch. Thank you, Hiroyuki YAMAMORI