Fix spec info's filter when reqs are finished right after prefill (#14742)

python/sglang/srt/managers/schedule_batch.py

@@ -1796,6 +1796,8 @@ class ScheduleBatch(ScheduleBatchDisaggregationDecodeMixin):
         self,
         chunked_req_to_exclude: Optional[Union[Req, List[Req]]] = None,
         keep_indices: Optional[List[int]] = None,
+        # FIXME(lsyin): deprecate this API after spec v1 is deprecated
+        v1_spec_info_filtered: Optional[bool] = False,
     ):
         # FIXME(lsyin): used here to get the correct seq_lens
         # The batch has been launched but we need it verified to get correct next batch info
@@ -1852,11 +1854,12 @@ class ScheduleBatch(ScheduleBatchDisaggregationDecodeMixin):
         self.has_grammar = any(req.grammar for req in self.reqs)
 
         self.sampling_info.filter_batch(keep_indices, keep_indices_device)
+        # NOTE: spec_info filtered before batch filtering only happens in:
+        # - Spec v1's verify phase
+        # - Only for decode batch (running_batch)
+        has_been_filtered = v1_spec_info_filtered and not self.is_v2_eagle
+
         if self.spec_info:
-            if chunked_req_to_exclude is not None and len(chunked_req_to_exclude) > 0:
-                has_been_filtered = False
-            else:
-                has_been_filtered = True
             self.spec_info.filter_batch(
                 new_indices=keep_indices_device,
                 has_been_filtered=has_been_filtered,