[fix] fix correct assertion syntax error in attention utils. (#22154)

Signed-off-by: zitian.zhao <zitian.zhao@tencentmusic.com>

[fix] fix correct assertion syntax error in attention utils. (#22154)
Signed-off-by: zitian.zhao <zitian.zhao@tencentmusic.com>
e27d25a0 · ZiTian.Zhao · GitHub · 6f547829 · e27d25a0
Unverified Commit e27d25a0 authored Aug 04, 2025 by ZiTian.Zhao Committed by GitHub Aug 03, 2025
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vllm/v1/attention/backends/utils.py vllm/v1/attention/backends/utils.py +3 -1

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--- a/vllm/v1/attention/backends/utils.py
+++ b/vllm/v1/attention/backends/utils.py
@@ -97,7 +97,9 @@ def _make_metadata_with_slice(

    query_start_loc = slice_query_start_locs(attn_metadata.query_start_loc,
                                             request_slice)
-    assert len(query_start_loc >= 2)
+    assert len(query_start_loc) >= 2, (
+        f"query_start_loc must have at least 2 elements, "
+        f"got {len(query_start_loc)}")
    query_start_loc_cpu = slice_query_start_locs(
        attn_metadata.query_start_loc_cpu, request_slice)