From 6aa3d81e79609eecc0adf700f651bd5760bed8cb Mon Sep 17 00:00:00 2001
From: L3MON4D3 <Simljk@outlook.de>
Date: Fri, 22 Sep 2023 18:16:17 +0200
Subject: [PATCH] dynamicNode: only update for complete snippet.

Should prevent stuff like the entier buffer being copied.
---
 lua/luasnip/nodes/dynamicNode.lua | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lua/luasnip/nodes/dynamicNode.lua b/lua/luasnip/nodes/dynamicNode.lua
index bdf31a953..03bc50802 100644
--- a/lua/luasnip/nodes/dynamicNode.lua
+++ b/lua/luasnip/nodes/dynamicNode.lua
@@ -119,6 +119,10 @@ function DynamicNode:update()
 		return
 	end
 
+	if not self.parent.snippet:extmarks_valid() then
+		error("Refusing to update a snippet with invalid extmarks")
+	end
+
 	local tmp
 	if self.snip then
 		if not args then
@@ -428,7 +432,10 @@ function DynamicNode:node_at(pos, mode)
 end
 
 function DynamicNode:extmarks_valid()
-	return node_util.generic_extmarks_valid(self, self.snip)
+	if self.snip then
+		return node_util.generic_extmarks_valid(self, self.snip)
+	end
+	return true
 end
 
 return {