On Thursday 10 May 2007, Andrey Borzenkov wrote:
> On Tuesday 01 May 2007, Mikael Magnusson wrote:
> > Hello, noticed this a while ago.
> >
> > % zsh -f
> > % setopt ignoreeof
> > % <ctrl-d>
> >
> > zsh: use 'exit' to exit.
> >
> > The prompt is now invisible.
>
> message is displayed using showmsg() that sets "clearflag" which should
> tell zrefresh() to not clear until end of screen (to preserve message).
> Unfortunately this flag has side effect that zrefresh() does not redisplay
> prompt either and skips over it.
>
> Unfortunately I do not see any easy way short of adding yet another flag. I
> have started git cvsimport to try bisect; have no idea how long it takes.

OK here is the attempt to fix it. It is using use_exit_printed as flag and 
moves its resetting a bit later, so flag is available in preprompt (where 
prompt was overwritten in case promptsp). If there are no objections I'll 
commit it.

P.S. git cvsimport still runs for over 9 hours now :)

Index: Src/init.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/init.c,v
retrieving revision 1.72
diff -u -p -r1.72 init.c
--- Src/init.c  8 Nov 2006 17:43:32 -0000       1.72
+++ Src/init.c  10 May 2007 05:58:39 -0000
@@ -123,6 +123,7 @@ loop(int toplevel, int justonce)
                errflag = 0;
            }
        }
+       use_exit_printed = 0;
        intr();                 /* interrupts on            */
        lexinit();              /* initialize lexical state */
        if (!(prog = parse_event())) {  /* if we couldn't parse a list */
@@ -1335,7 +1336,6 @@ zsh_main(UNUSED(int argc), char **argv)
     init_misc();

     for (;;) {
-       use_exit_printed = 0;
        /*
         * See if we can free up some of jobtab.
         * We only do this at top level, because if we are
Index: Src/utils.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/utils.c,v
retrieving revision 1.163
diff -u -p -r1.163 utils.c
--- Src/utils.c 26 Apr 2007 09:27:44 -0000      1.163
+++ Src/utils.c 10 May 2007 05:58:40 -0000
@@ -1156,7 +1156,7 @@ preprompt(void)
     int period = getiparam("PERIOD");
     int mailcheck = getiparam("MAILCHECK");

-    if (isset(PROMPTSP) && isset(PROMPTCR)) {
+    if (isset(PROMPTSP) && isset(PROMPTCR) && !use_exit_printed) {
        /* The PROMPT_SP heuristic will move the prompt down to a new line
         * if there was any dangling output on the line (assuming the terminal
         * has automatic margins, but we try even if hasam isn't set). */