vis: avoid inconsistent state after file reloading with :e

When a file is opened in multiple windows we could end up in an
inconsistent state by doing:

 $ vis some-file
 :spl
 :e

At this point the two windows were referencing different file objects
thus changes in one would not affect the other although they have
the same path.

Another option would be to reload all windows currently displaying
the file being reloaded. We opt for the simpler fix for now.

1 files changed, 6 insertions, 1 deletions

diff --git a/vis-cmds.c b/vis-cmds.c
index 11a92dc..18169f5 100644
--- a/vis-cmds.c
+++ b/vis-cmds.c
@@ -321,8 +321,13 @@ static bool cmd_edit(Vis *vis, Win *win, Command *cmd, const char *argv[], Curso
 		info_unsaved_changes(vis);
 		return false;
 	}
-	if (!argv[1])
+	if (!argv[1]) {
+		if (oldwin->file->refcount > 1) {
+			vis_info_show(vis, "Can not reload file being opened multiple times");
+			return false;
+		}
 		return vis_window_reload(oldwin);
+	}
 	if (!openfiles(vis, &argv[1]))
 		return false;
 	if (vis->win != oldwin) {