core dump after in zftp open after zftp close

["Andrej Borsenkow" <Andrej.Borsenkow@xxxxxxxxxxxxxx>]

bor@itsrm2% zsh
bor@itsrm2% zmodload zsh/net/tcp
bor@itsrm2% zmodload zsh/zftp
bor@itsrm2% zftp open localhost
bor@itsrm2% zftp close
bor@itsrm2% zftp open localhost
zsh: bus error (core dumped)  zsh
bor@itsrm2% dbx =zsh core
dbx V2.4C00 SINIX (Jun 19 2000)
Copyright (C) Siemens AG 1998
Base:   BSD, Copyright (C) The Regents of the University of California
All rights reserved
reading symbolic information ...
Current signal in memory image is: SIGBUS (10) (non-existent physical
address, faulting address = 0x0000000c)
needed shared libraries:
        /usr/lib/tcpip.so
        /tools/lib/zsh/4.1.0-dev-0/zsh/zftp.so
        /tools/lib/zsh/4.1.0-dev-0/zsh/net/tcp.so
        /tools/lib/zsh/4.1.0-dev-0/zsh/parameter.so
        /tools/lib/zsh/4.1.0-dev-0/zsh/zutil.so
        /tools/lib/zsh/4.1.0-dev-0/zsh/complist.so
        /tools/lib/zsh/4.1.0-dev-0/zsh/complete.so
        /tools/lib/zsh/4.1.0-dev-0/zsh/zle.so
        /usr/lib/libc.so.1
        /lib/libnsl.so
        /lib/libdl.so
        /lib/libsocket.so
... reading /usr/lib/tcpip.so
... reading /tools/lib/zsh/4.1.0-dev-0/zsh/zftp.so
... reading /tools/lib/zsh/4.1.0-dev-0/zsh/net/tcp.so
... reading /tools/lib/zsh/4.1.0-dev-0/zsh/parameter.so
... reading /tools/lib/zsh/4.1.0-dev-0/zsh/zutil.so
... reading /tools/lib/zsh/4.1.0-dev-0/zsh/complist.so
... reading /tools/lib/zsh/4.1.0-dev-0/zsh/complete.so
... reading /tools/lib/zsh/4.1.0-dev-0/zsh/zle.so
... reading /usr/lib/libc.so.1
... reading /lib/libnsl.so
... reading /lib/libdl.so
... reading /lib/libsocket.so
[using memory image in core]
32bit dbx - 32bit program
Type 'help' for help
(dbx32) where
_filbuf() at 0xc04ad60
zfgetline(ln = "", lnsize = 255, tmout = 60), line 597 in
"/tools/src/zsh/Src/Modules/zftp.c"
zfgetmsg(), line 713 in "/tools/src/zsh/Src/Modules/zftp.c"
zftp_test(name = "zftp test", args = (nilv), flags = 0), line 2220 in
"/tools/src/zsh/Src/Modules/zftp.c"
bin_zftp(name = "zftp", args = 0x789844, ops = "", func = 0), line 2993 in
"/tools/src/zsh/Src/Modules/zftp.c"
$b125, line 367 in "/tools/src/zsh/Src/builtin.c"
execbuiltin(args = 0x7897f0, bn = 0xd40f9ac), line 367 in
"/tools/src/zsh/Src/builtin.c"
$b454, line 2287 in "/tools/src/zsh/Src/exec.c"
execcmd(state = 0x7ffeeca4, input = 0, output = 0, how = 18, last1 = 2),
line 2287 in "/tools/src/zsh/Src/exec.c"
execpline2(state = 0x7ffeeca4, pcode = 387, how = 18, input = 0, output = 0,
last1 = 0), line 1192 in "/tools/src/zsh/Src/exec.c"
execpline(state = 0x7ffeeca4, slcode = 5122, how = 18, last1 = 0), line 982
in "/tools/src/zsh/Src/exec.c"
execlist(state = 0x7ffeeca4, dont_change_job = 0, exiting = 0), line 826 in
"/tools/src/zsh/Src/exec.c"
execode(p = 0x789798, dont_change_job = 0, exiting = 0), line 729 in
"/tools/src/zsh/Src/exec.c"
$b501, line 160 in "/tools/src/zsh/Src/init.c"
.init.loop(toplevel = 1, justonce = 0), line 160 in
"/tools/src/zsh/Src/init.c"
zsh_main(argc = 1, argv = 0x7ffeeddc), line 1209 in
"/tools/src/zsh/Src/init.c"
.main.main(argc = 1, argv = 0x7ffeeddc), line 37 in
"/tools/src/zsh/Src/main.c"
__start() at 0x40a144
(dbx32)