dirstack=(/) dumps core

[Tanaka Akira <akr@xxxxxxxxxxx>]

I heard that assignment to dirstack may cause core dump.  I can get
core on linux.

Z:akr@thorax% unlimit coredumpsize 
Z:akr@thorax% zsh -f
thorax% dirstack=(/)
zsh: segmentation fault (core dumped)  zsh -f
Z:akr@thorax% 

(gdb) where
#0  0x400de9cc in free () from /lib/libc.so.6
#1  0x400de97d in free () from /lib/libc.so.6
#2  0x80a3abd in freearray (s=0x80d6954) at utils.c:1958
#3  0x401e24f3 in dirssetfn (pm=0x80d7550, x=0x80d6954) at parameter.c:977
#4  0x8089022 in setarrvalue (v=0xbffff948, val=0x80d6950) at params.c:1583
#5  0x80897bd in setaparam (s=0x400146d4 "", val=0x80d6950) at params.c:1782
#6  0x805fcd0 in addvars (state=0xbffffa3c, pc=0x400146b8, export=0) at exec.c:1531
#7  0x805daac in execsimple (state=0xbffffa3c) at exec.c:741
#8  0x805dc2d in execlist (state=0xbffffa3c, dont_change_job=0, exiting=0) at exec.c:792
#9  0x805da3b in execode (p=0x40014690, dont_change_job=0, exiting=0) at exec.c:721
#10 0x807192a in loop (toplevel=1, justonce=0) at init.c:144
#11 0x8051371 in main (argc=2, argv=0xbffffb04) at ./main.c:86
-- 
Tanaka Akira