From e041e3967fd5d1b2c8cca3112f4823137541ecf5 Mon Sep 17 00:00:00 2001
From: Feli <feli@hnu.edu.cn>
Date: Sun, 9 Aug 2026 02:05:32 +0800
Subject: [PATCH] Fix abort when vector elements=0

---
 mlx/backend/metal/device.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mlx/backend/metal/device.h b/mlx/backend/metal/device.h
index 871e95ccff..9b883ba8ab 100644
--- a/mlx/backend/metal/device.h
+++ b/mlx/backend/metal/device.h
@@ -64,8 +64,10 @@ class MLX_API CommandEncoder {
 
   template <typename Vec, typename = std::enable_if_t<is_vector_v<Vec>>>
   void set_vector_bytes(const Vec& vec, size_t nelems, int idx) {
-    get_command_encoder()->setBytes(
-        vec.data(), nelems * sizeof(typename Vec::value_type), idx);
+    if (nelems > 0) {
+      get_command_encoder()->setBytes(
+          vec.data(), nelems * sizeof(typename Vec::value_type), idx);
+    }
   }
   template <typename Vec, typename = std::enable_if_t<is_vector_v<Vec>>>
   void set_vector_bytes(const Vec& vec, int idx) {