From 6927739b83ae20e129fd571685c878f1f4d89b2f Mon Sep 17 00:00:00 2001
From: Ard <88337265+aw471@users.noreply.github.com>
Date: Mon, 2 Nov 2026 14:19:01 -0800
Subject: [PATCH] Avoid dynamic data slicing when copying empty variable-length
 tensors

---
 sdm/tensor/var_len.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sdm/tensor/var_len.py b/sdm/tensor/var_len.py
index a31438a97..9088a4fc0 100644
--- a/sdm/tensor/var_len.py
+++ b/sdm/tensor/var_len.py
@@ -825,7 +825,9 @@ def _to_dtype_layout(
     storage_offset = int(inp.storage_offset())
     span_len = _span_len(inp.size(), inp.stride())
     offset = inp._offset[storage_offset : storage_offset + span_len + 1]
-    data = inp._data[offset[0] : offset[-1]].to(
+    data = inp._data
+    data = data[:0] if inp.numel() == 0 else data[offset[0] : offset[-1]]
+    data = data.to(
         device=device,
         dtype=dtype,
         non_blocking=non_blocking,