Error: "Invalid 2nd Argument" for 'tracer' in Stylus replay and trace commands

[barabanovro]

Environment

• Operating System: Linux Ubuntu x86_64
• Stylus Version: 0.5.3 (using cargo stylus --version)
• Node Provider: Alchemy (supports debug endpoints)

Problem

I encountered an error when trying to use the stylus replay command. The error message is:

"invalid 2nd argument: options 'tracer': invalid tracer value"

Logs:

cargo stylus replay --tx=$TX_HASH --endpoint=$RPC_URL
Reading symbols from /root/.cargo/bin/cargo-stylus...
(No debugging symbols found in /root/.cargo/bin/cargo-stylus)
Function "user_entrypoint" not defined.
Breakpoint 1 (user_entrypoint) pending.
Starting program: /root/.cargo/bin/cargo-stylus stylus replay --tx=0xea570604b7df1ea95e528554c2ef82ee6a5c051e165e8fcd9e39447c4e8178fe --endpoint=https://arb-sepolia.g.alchemy.com/v2/c1n3IjOqwsc7ucA_zem_L-********** --child
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Detaching after vfork from child process 919674]
[New Thread 0x7ffff7798640 (LWP 919675)]
Error: failed to replay tx

Caused by:
    (code: -32602, message: invalid 2nd argument: options 'tracer': invalid tracer value, data: None)

Location:
    /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cargo-stylus-0.5.3/src/trace.rs:49:40
[Thread 0x7ffff7798640 (LWP 919675) exited]
[Inferior 1 (process 919671) exited with code 01]

The request payload I saw in the Alchemy dashboard:

{
  "id": 3,
  "jsonrpc": "2.0",
  "method": "debug_traceTransaction",
  "params": [
    "0xea570604b7df1ea95e528554c2ef82ee6a5c051e165e8fcd9e39447c4e8178fe",
    {
      "tracer": "{\n    \"hostio\": function(info) {\n        info.args = toHex(info.args);\n        info.outs = toHex(info.outs);\n        if (this.nests.includes(info.name)) {\n            Object.assign(info, this.open.pop());\n            info.name = info.name.substring(4) // remove evm_\n        }\n        this.open.push(info);\n    },\n    \"enter\": function(fr"
    }
  ]
}

I also encountered the same error when trying to use the stylus trace command. Logs:

cargo stylus trace --tx=$TX_HASH --endpoint=$RPC_URL
Error: failed to trace tx

Caused by:
    (code: -32602, message: invalid 2nd argument: options 'tracer': invalid tracer value, data: None)

Location:
    /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cargo-stylus-0.5.3/src/trace.rs:49:40

Steps to Reproduce

Follow the tutorial at https://docs.arbitrum.io/stylus/how-tos/debugging-stylus-tx .