From 505364a66123934e9f682b5e02ca6edb36e3e087 Mon Sep 17 00:00:00 2001
From: luaneko <lumi@lua.re>
Date: Sat, 28 Jun 2025 19:59:37 +1000
Subject: [PATCH] Check argument against negative sleep duration

---
 crates/lb/src/task.rs    | 2 +-
 crates/lb/tests/task.lua | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/crates/lb/src/task.rs b/crates/lb/src/task.rs
index 3aa017e..ab1e7c7 100644
--- a/crates/lb/src/task.rs
+++ b/crates/lb/src/task.rs
@@ -36,7 +36,7 @@ impl lb_tasklib {
     }
 
     pub async extern "Lua-C" fn sleep(ms: f64) {
-        sleep(Duration::from_secs_f64(ms / 1000.)).await;
+        sleep(Duration::from_secs_f64(ms.max(0.) / 1000.)).await;
     }
 
     pub extern "Lua" fn spawn(f: function, ...) -> lb_task {
diff --git a/crates/lb/tests/task.lua b/crates/lb/tests/task.lua
index 6e029f1..2446af8 100644
--- a/crates/lb/tests/task.lua
+++ b/crates/lb/tests/task.lua
@@ -111,6 +111,11 @@ describe("spawn", function()
 end)
 
 describe("sleep", function()
+  test("invalid arg", function()
+    assert(not pcall(task.sleep, "invalid"))
+    task.sleep(-1) -- negative sleep should just become 0ms
+  end)
+
   test("sleep is asynchronous", function()
     local value
     spawn(function()