% testparm -s -v --parameter-name "msdf proxy"
Load smb config files from /usr/local/etc/smb.conf
Loaded services file OK.
zsh: segmentation fault   -s -v --parameter-name "msdf proxy"


(gdb) where
#0  0x08062e56 in lp_add_home (pszHomename=0xffffffff <Address 0xffffffff out of bounds>,
    iDefaultService=135151696, user=0x282e92d8 "", pszHomedir=0x1 <Address 0x1 out of bounds>)
    at param/loadparm.c:2568
#1  0x0805b0d7 in init_printer_values (pService=0x6) at param/loadparm.c:1291
#2  0x0805a015 in _start ()
#3  0x00000006 in ?? ()
(gdb) frame 0
#0  0x08062e56 in lp_add_home (pszHomename=0xffffffff <Address 0xffffffff out of bounds>,
    iDefaultService=135151696, user=0x282e92d8 "", pszHomedir=0x1 <Address 0x1 out of bounds>)
    at param/loadparm.c:2568
2568            if (!(*(ServicePtrs[iDefaultService]->szPath))
(gdb) list
2563            i = add_a_service(ServicePtrs[iDefaultService], pszHomename);
2564
2565            if (i < 0)
2566                    return (False);
2567
2568            if (!(*(ServicePtrs[iDefaultService]->szPath))
2569                || strequal(ServicePtrs[iDefaultService]->szPath, lp_pathname(GLOBAL_SECTION_SNUM))) {
2570                    pstrcpy(newHomedir, pszHomedir);
2571                    string_set(&ServicePtrs[i]->szPath, newHomedir);
2572            }


I still have a core dump, so can provide further info by request. 

Thanks.