From f5e4ee90e45db7d7833ea5f3927dc868b2002939 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Sat, 21 Oct 2023 16:11:15 +0900
Subject: [PATCH] Fix bug where top section of the previous preview content
 appearing

when the preview window is re-enabled and the current preview process is
taking more than 500ms and previewDelayed is triggered

  fzf --preview 'sleep 1; date; seq 1000' --bind space:toggle-preview
---
 src/terminal.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/terminal.go b/src/terminal.go
index 687352f..9fac977 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -3100,6 +3100,10 @@ func (t *Terminal) Loop() {
 							t.previewBox.Set(reqPreviewEnqueue,
 								previewRequest{t.previewOpts.command, t.pwindow, t.evaluateScrollOffset(), list})
 						}
+					} else {
+						// Discard the preview content so that it won't accidentally appear
+						// when preview window is re-enabled and previewDelay is triggered
+						t.previewer.lines = nil
 					}
 				}
 			case actTogglePreviewWrap: