From 509048b9df3db1a6f53b1aac885eb5c79f5987bc Mon Sep 17 00:00:00 2001
From: vnnh <90565423+vnnh@users.noreply.github.com>
Date: Sat, 4 Jan 2025 23:41:52 -0600
Subject: [PATCH] Fix table.move usage in query_cached (#173)

* Fix table.move usage in query_cached

* Add test case
---
 jecs.luau       |  2 +-
 test/tests.luau | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/jecs.luau b/jecs.luau
index 473b620a..332652ef 100644
--- a/jecs.luau
+++ b/jecs.luau
@@ -1589,7 +1589,7 @@ local function query_cached(query: QueryInner)
 	local with = query.filter_with
 	local ids = query.ids
 	if with then
-		table.move(ids, 1, #ids, #with, with)
+		table.move(ids, 1, #ids, #with + 1, with)
 	else
 		query.filter_with = ids
 	end
diff --git a/test/tests.luau b/test/tests.luau
index 8da151f1..a8d53b1d 100644
--- a/test/tests.luau
+++ b/test/tests.luau
@@ -1495,5 +1495,22 @@ TEST("repro", function()
 		end
 		CHECK(counter == 1)
 	end
+
+	do CASE "#3" -- ISSUE #171
+		local world = world_new()
+		local component1 = world:component()
+		local tag1 = world:entity()
+		
+		local query = world:query(component1):with(tag1):cached()
+		
+		local entity = world:entity()
+		world:set(entity, component1, "some data")
+
+		local counter = 0
+		for x in query:iter() do
+			counter += 1
+		end
+		CHECK(counter == 0)
+	end
 end)
 FINISH()