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Subject: core dump in vichange()
Message-Id: <83FCB166-FC90-4A7A-80A2-6A0420FFA87A@kba.biglobe.ne.jp>
Date: Thu, 13 Mar 2014 21:31:59 +0900
To: zsh-workers@zsh.org
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The following causes a core dump in function vichange():

$ zsh -f
$ bindkey -v
$ echo foo
$ <ESC>kcw

k=3Dup-line-or-history, c=3Dvi-change, w=3Dvi-forward-word
(or 'kc' followed by any motion command)

The core dump is at line 404 of zle_vi.c:
        vistartchange =3D curchange->prev->changeno;
with curchange->prev =3D=3D NULL.


diff --git a/Src/Zle/zle_vi.c b/Src/Zle/zle_vi.c
index 994b44f..9e39143 100644
--- a/Src/Zle/zle_vi.c
+++ b/Src/Zle/zle_vi.c
@@ -401,7 +401,7 @@ vichange(UNUSED(char **args))
 	forekill(c2 - zlecs, CUT_RAW);
 	selectkeymap("main", 1);
 	viinsbegin =3D zlecs;
-	vistartchange =3D curchange->prev->changeno;
+	vistartchange =3D (curchange && curchange->prev) ? =
curchange->prev->changeno : 0;
     }
     return ret;
 }