Fix crash when minimising pane.

cmd-minimise-pane.c

@@ -30,7 +30,8 @@
 static enum cmd_retval cmd_minimise_pane_minimise_exec(struct cmd *, struct cmdq_item *);
 static enum cmd_retval cmd_minimise_pane_unminimise_exec(struct cmd *, struct cmdq_item *);
 
-static enum cmd_retval cmd_minimise_pane_minimise(struct window *, struct window_pane *);
+static enum cmd_retval cmd_minimise_pane_minimise(struct window *, struct window_pane *,
+    struct cmdq_item *);
 static enum cmd_retval cmd_minimise_pane_unminimise(struct window *, struct window_pane *);
 
 const struct cmd_entry cmd_minimise_pane_entry = {
@@ -73,10 +74,11 @@ cmd_minimise_pane_minimise_exec(struct cmd *self, struct cmdq_item *item)
 	enum cmd_retval				 rv;
 
 	if (args_has(args, 'a')) {
+		struct window_pane *active_pane = w->active;
 		TAILQ_FOREACH(wp, &w->z_index, zentry) {
-			if (!window_pane_visible(wp))
+			if (!window_pane_visible(wp) || wp == active_pane)
 				continue;
-			rv = cmd_minimise_pane_minimise(w, wp);
+			rv = cmd_minimise_pane_minimise(w, wp, item);
 			if (rv != CMD_RETURN_NORMAL)
 				return (rv);
 		}
@@ -95,7 +97,7 @@ cmd_minimise_pane_minimise_exec(struct cmd *self, struct cmdq_item *item)
 			cmdq_error(item, "No target pane to miminise.");
 			return (CMD_RETURN_ERROR);
 		}
-		return(cmd_minimise_pane_minimise(w, wp));
+		return (cmd_minimise_pane_minimise(w, wp, item));
 	}
 }
 
@@ -139,18 +141,37 @@ cmd_minimise_pane_unminimise_exec(struct cmd *self, struct cmdq_item *item)
 }
 
 static enum cmd_retval
-cmd_minimise_pane_minimise(struct window *w, struct window_pane *wp)
+cmd_minimise_pane_minimise(struct window *w, struct window_pane *wp,
+    __attribute__((unused)) struct cmdq_item *item)
 {
-	struct window_pane	*wp2;
+	struct window_pane	*pwp = NULL;
 
-	/* Ignore if already minimised to prevent double-redistribution. */
 	if (wp->flags & PANE_MINIMISED)
 		return (CMD_RETURN_NORMAL);
 
-	wp->flags |= PANE_MINIMISED;
-	window_deactivate_pane(w, wp, 1);
+	if (wp == w->active) {
+		/*
+		 * Unzoom before searching: under zoom, window_pane_visible
+		 * returns false for every non-active pane.
+		 */
+		if (w->flags & WINDOW_ZOOMED)
+			window_unzoom(w, 1);
+		/* Find previous active pane. */
+		TAILQ_FOREACH(pwp, &w->last_panes, sentry) {
+			if (pwp != wp && window_pane_visible(pwp))
+				break;
+		}
+		if (pwp == NULL) {
+			TAILQ_FOREACH(pwp, &w->z_index, zentry) {
+				if (pwp != wp &&
+				    window_pane_visible(pwp))
+					break;
+			}
+		}
+	}
+
+	wp->flags |= PANE_MINIMISED;
 
-	/* Fix pane offsets and sizes. */
 	if (w->layout_root != NULL) {
 		wp->saved_layout_cell = wp->layout_cell;
 		layout_minimise_cell(w, wp->layout_cell);
@@ -158,17 +179,22 @@ cmd_minimise_pane_minimise(struct window *w, struct window_pane *wp)
 		layout_fix_panes(w, NULL);
 	}
 
-	/* Find next visible window in z-index. */
-	TAILQ_FOREACH(wp2, &w->z_index, zentry) {
-		if (!window_pane_visible(wp2))
-			continue;
-		break;
-	}
-	if (wp2 != NULL)
-		window_set_active_pane(w, wp2, 1);
-
+	window_pane_stack_remove(&w->last_panes, wp);
+	if (pwp != NULL) {
+		window_set_active_pane(w, pwp, 1);
+	} else if (wp == w->active) {
+		/* No visible previous active pane; null active pane
+		 * to show dots background. */
+		w->active = NULL;
+		if (options_get_number(global_options, "focus-events"))
+			window_pane_update_focus(wp);
+		notify_window("window-pane-changed", w);
 		notify_window("window-layout-changed", w);
 		server_redraw_window(w);
+	} else {
+		notify_window("window-layout-changed", w);
+		server_redraw_window(w);
+	}
 
 	return (CMD_RETURN_NORMAL);
 }

control-notify.c

@@ -77,6 +77,9 @@ control_notify_window_pane_changed(struct window *w)
 {
 	struct client	*c;
 
+	if (w->active == NULL)
+		return;
+
 	TAILQ_FOREACH(c, &clients, entry) {
 		if (!CONTROL_SHOULD_NOTIFY_CLIENT(c))
 			continue;

server-client.c

@@ -2197,7 +2197,7 @@ server_client_set_path(struct client *c)
 	struct session	*s = c->session;
 	const char	*path;
 
-	if (s->curw == NULL)
+	if (s->curw == NULL || s->curw->window->active == NULL)
 		return;
 	if (s->curw->window->active->base.path == NULL)
 		path = "";
@@ -2217,7 +2217,7 @@ server_client_set_progress_bar(struct client *c)
 	struct session		*s = c->session;
 	struct progress_bar	*pane_pb;
 
-	if (s->curw == NULL)
+	if (s->curw == NULL || s->curw->window->active == NULL)
 		return;
 	pane_pb = &s->curw->window->active->base.progress_bar;
 	if (pane_pb->state == c->progress_bar.state &&

tmux.h

@@ -3412,8 +3412,6 @@ struct window_pane *window_find_string(struct window *, const char *);
 int		 window_has_pane(struct window *, struct window_pane *);
 int		 window_set_active_pane(struct window *, struct window_pane *,
 		     int);
-int		 window_deactivate_pane(struct window *, struct window_pane *,
-		     int);
 void		 window_update_focus(struct window *);
 void		 window_pane_update_focus(struct window_pane *);
 void		 window_redraw_active_switch(struct window *,

window.c

@@ -570,32 +570,6 @@ window_set_active_pane(struct window *w, struct window_pane *wp, int notify)
 	return (1);
 }
 
-int
-window_deactivate_pane(struct window *w, struct window_pane *wp, int notify)
-{
-	struct window_pane *lastwp;
-
-	log_debug("%s: pane %%%u", __func__, wp->id);
-
-	if (w->flags & WINDOW_ZOOMED)
-		window_unzoom(w, 1);
-	lastwp = w->active;
-
-	window_pane_stack_remove(&w->last_panes, wp);
-	window_pane_stack_push(&w->last_panes, lastwp);
-
-	w->active = NULL;
-
-	if (options_get_number(global_options, "focus-events")) {
-		window_pane_update_focus(lastwp);
-	}
-
-	tty_update_window_offset(w);
-
-	if (notify)
-		notify_window("window-pane-changed", w);
-	return (1);
-}
 
 static int
 window_pane_get_palette(struct window_pane *wp, int c)