Включаем вимовые биндинги в /etc/zlerc. Открываем шелл, жмем в нем "вверх", 
<esc>gjii. Получаем какую-то ^@. Жмем "вверх.

#0  0x400a6571 in kill () from /lib/libc.so.6
#1  0x400a62f5 in raise () from /lib/libc.so.6
#2  0x400a7790 in abort () from /lib/libc.so.6
#3  0x400d9f5e in __fsetlocking () from /lib/libc.so.6
#4  0x400dfd16 in malloc_usable_size () from /lib/libc.so.6
#5  0x400e082f in free () from /lib/libc.so.6
#6  0x401ee990 in zle_setline () from /usr/lib/zsh/zle.so
#7  0x401f1454 in historybeginningsearchbackward () from /usr/lib/zsh/zle.so
#8  0x401f50ca in execzlefunc () from /usr/lib/zsh/zle.so
#9  0x401f5667 in zlecore () from /usr/lib/zsh/zle.so
#10 0x401f6355 in zleread () from /usr/lib/zsh/zle.so
#11 0x0807a04c in ingetc ()
#12 0x08073351 in quietgethist ()
#13 0x08080ea6 in gettok ()
#14 0x08081de5 in yylex ()
#15 0x08097126 in parse_event ()
#16 0x08076cb6 in loop ()
#17 0x080797c2 in zsh_main ()
#18 0x0805275e in main ()

zsh-4.3.0-alt0.2