[fix] Clamp logprob with dtype min to prevent -inf (#3224)

test/srt/sampling/penaltylib/test_srt_endpoint_with_penalizers.py

@@ -36,7 +36,7 @@ class TestBatchPenalizerE2E(unittest.TestCase):
     def run_decode(
         self,
         return_logprob=True,
-        top_logprobs_num=3,
+        top_logprobs_num=5,
         return_text=True,
         n=1,
         **sampling_params,
@@ -58,8 +58,7 @@ class TestBatchPenalizerE2E(unittest.TestCase):
                 "logprob_start_len": 0,
             },
         )
-        print(json.dumps(response.json()))
-        print("=" * 100)
+        assert response.status_code == 200, "Request failed: " + response.text
 
     def test_default_values(self):
         self.run_decode()
@@ -112,4 +111,4 @@ class TestBatchPenalizerE2E(unittest.TestCase):
 
 
 if __name__ == "__main__":
-    unittest.main()
+    unittest.main(verbosity=3)