From 44bb3533465d30062b28a334115e37dbbe7e5118 Mon Sep 17 00:00:00 2001
From: champignoom <66909116+champignoom@users.noreply.github.com>
Date: Mon, 7 Aug 2023 20:43:04 +0800
Subject: [PATCH] fix(concealer): tolerate duplicate marks caused by undo
 during rendering (#1015)

fixes https://github.com/nvim-neorg/neorg/issues/1007
---
 lua/neorg/modules/core/concealer/module.lua | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lua/neorg/modules/core/concealer/module.lua b/lua/neorg/modules/core/concealer/module.lua
index 2d33edd22..758a89d2f 100644
--- a/lua/neorg/modules/core/concealer/module.lua
+++ b/lua/neorg/modules/core/concealer/module.lua
@@ -1139,6 +1139,10 @@ local function render_window_buffer(bufid)
     local row_nomark_start_0b, row_nomark_end_0bin
     local i_flag = 1
     for i = row_start_0b, row_end_0bex - 1 do
+        while i_flag <= #prettify_flags_0b and i > prettify_flags_0b[i_flag][2] do
+            i_flag = i_flag + 1
+        end
+
         if i_flag <= #prettify_flags_0b and i == prettify_flags_0b[i_flag][2] then
             i_flag = i_flag + 1
         else