On Mon, July 1, 2013 17:45, Ingo Karkat wrote:
> Hello Vim developers,
>
> I noticed a regression:
>
> $ vim -N -u NONE
> :echo "foo"
> " The intro message is cleared, the (now empty) UI does not show "foo".
> " Expected behavior: The intro message stays visible, the command-line
> shows "foo".
>
> This happens with any command that echoes a single line, e.g. also with
> :set ic?, or :nmap. Only the very first command (output) is affected;
> subsequent commands (after the intro message was cleared) show up fine.
> I see this in Vim 7.3.1280 (huge build on Ubuntu 13.04/x64), but not in
> Vim 7.3.712. It also doesn't happen in GVIM, only in the terminal UI.
I don't see this for vim -u NONE -N (and I suspect, this is terminal
related), but for me this happens, because I have a plugin, that resets
some highlighting groups whenever the statusline is drawn. This triggers
a do_highlight() call, which in turn calls redraw_win_later() and resets
must_redraw, although it has been set to zero earlier in update_screen()
This patch fixes it for me, but I am not sure, this also fixes your
issue:
diff --git a/src/screen.c b/src/screen.c
--- a/src/screen.c
+++ b/src/screen.c
@@ -327,6 +327,7 @@
{
win_T *wp;
static int did_intro = FALSE;
+ int cur_must_redraw = must_redraw;
#if defined(FEAT_SEARCH_EXTRA) || defined(FEAT_CLIPBOARD)
int did_one;
#endif
@@ -335,16 +336,16 @@
if (!screen_valid(TRUE))
return;
- if (must_redraw)
- {
- if (type < must_redraw) /* use maximal type */
- type = must_redraw;
+ if (cur_must_redraw)
+ {
+ if (type < cur_must_redraw) /* use maximal type */
+ type = cur_must_redraw;
/* must_redraw is reset here, so that when we run into some weird
* reason to redraw while busy redrawing (e.g., asynchronous
* scrolling), or update_topline() in win_update() will cause a
* scroll, the screen will be redrawn later or in win_update(). */
- must_redraw = 0;
+ cur_must_redraw = 0;
}
/* Need to update w_lines[]. */
@@ -356,7 +357,7 @@
if (!redrawing() || updating_screen)
{
redraw_later(type); /* remember type for next time */
- must_redraw = type;
+ cur_must_redraw = type;
if (type > INVERTED_ALL)
curwin->w_lines_valid = 0; /* don't use w_lines[].wl_size now */
return;
@@ -594,6 +595,7 @@
gui_update_scrollbars(FALSE);
}
#endif
+ must_redraw = cur_must_redraw;
}
#if defined(FEAT_CONCEAL) || defined(PROTO)
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