tapplied Alex Sedov's Tab buffer termination patch, thanks - dmenu - Dmenu fork with xft fonts.
 (HTM) git clone git://r-36.net/dmenu
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       ---
 (DIR) commit ec64f273fb7660d3746eb765dc02e40726a54294
 (DIR) parent 0d12a47415edba5db73f56dba76f123394581387
 (HTM) Author: Anselm R Garbe <anselm@garbe.us>
       Date:   Wed, 17 Apr 2013 20:59:12 +0200
       
       applied Alex Sedov's Tab buffer termination patch, thanks
       
       Diffstat:
         dmenu.c                             |       3 ++-
       
       1 file changed, 2 insertions(+), 1 deletion(-)
       ---
 (DIR) diff --git a/dmenu.c b/dmenu.c
       t@@ -392,7 +392,8 @@ keypress(XKeyEvent *ev) {
                case XK_Tab:
                        if(!sel)
                                return;
       -                strncpy(text, sel->text, sizeof text);
       +                strncpy(text, sel->text, sizeof text - 1);
       +                text[sizeof text - 1] = '\0';
                        cursor = strlen(text);
                        match();
                        break;