fix(auto): skip blank lines when reading wav.scp and jsonl file lists

A blank or whitespace-only line in a file list crashes prepare_data_iterator:
the id/data branch indexes lines[0] on an empty split (IndexError), and the
.jsonl branch feeds an empty string to json.loads (JSONDecodeError). Skip
blank lines so a trailing or separator line no longer aborts the whole batch.

Author: Lesereingrape

funasr/auto/auto_model.py

@@ -469,6 +469,8 @@ def prepare_data_iterator(
         if file_extension in filelist:  # filelist: wav.scp, file.jsonl;text.txt;
             with open(data_in, encoding="utf-8") as fin:
                 for line in fin:
+                    if not line.strip():
+                        continue
                     key = "rand_key_" + "".join(random.choice(chars) for _ in range(13))
                     if data_in.endswith(".jsonl"):  # file.jsonl: json.dumps({"source": data})
                         lines = json.loads(line.strip())

tests/test_pcm_input_format.py

@@ -97,6 +97,25 @@ def test_default_batch_behavior_is_unchanged():
     assert values is data
 
 
+def test_scp_filelist_skips_blank_lines(tmp_path):
+    list_path = tmp_path / "wav.scp"
+    list_path.write_text("utt1 /a.wav\n\n \t \nutt2 /b.wav\n", encoding="utf-8")
+    keys, values = prepare_data_iterator(str(list_path))
+    assert keys == ["utt1", "utt2"]
+    assert values == ["/a.wav", "/b.wav"]
+
+
+def test_jsonl_filelist_skips_blank_lines(tmp_path):
+    list_path = tmp_path / "data.jsonl"
+    list_path.write_text(
+        '{"key": "k1", "source": "/a.wav"}\n\n \t \n{"key": "k2", "source": "/b.wav"}\n',
+        encoding="utf-8",
+    )
+    keys, values = prepare_data_iterator(str(list_path))
+    assert keys == ["k1", "k2"]
+    assert values == ["/a.wav", "/b.wav"]
+
+
 class _RecordingModel(torch.nn.Module):
     def __init__(self, vad=False):
         super().__init__()