Special character in torch.profile results

[lk-chen]

While profiling following Profiling vLLM — vLLM, I hit the following error while view trace results in browser

UI: https://ui.perfetto.dev/v49.0-b2340d0ca

Failure parsing JSON: unable to parse string: '"i
i
i
i
i
i
i
i
i
i
j
j
j
j
j
j
j
k
k
k
k
k
k
k
l
l
l
l
l
l
l
m
m
m
m
m
m
m
m
m

(0): �qH^�U", "pid": 1834146, "tid": 1834146,
    "ts": 1229135469847.059, "dur": 0.080,
    "args": {
      "Python parent id": 11355, "Python id": 11356, "Ev Idx": 43456
    }
  }

Trace: not available (No trace loaded). Provide repro steps.
UA: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Referrer: https://docs.vllm.ai/en/v0.5.5/dev/profiling/profiling_index.html

Opening the profiling results (JSON file), I saw

Did anyone hit similar issue?