[3.2] Modify trace_api_plugin to report serialization errors to user

[heifner]

The exception handler for the trace_api_plugin data handler now rethrows any exceptions so they can be reported to the API caller of /v1/trace_api/get_block and /v1/trace_api/get_transaction_trace.

trace_api_plugin will now report

./cleos --verbose --print-response get block_trace 20
RESPONSE:
---------------------
{
  "code": 500,
  "message": "Internal Service Error",
  "error": {
    "code": 2,
    "name": "timeout_exception",
    "what": "deadline 2023-07-25T20:19:49.442 exceeded by 24us ",
    "details": [{
        "message": "deadline 2023-07-25T20:19:49.442 exceeded by 24us ",
        "file": "trace_api_plugin.cpp",
        "line_number": 288,
        "method": "operator()"
      }
    ]
  }
}
---------------------
error 2023-07-25T20:19:49.445 cleos     main.cpp:4498                 operator()           ] Failed with error: 2 timeout_exception: deadline 2023-07-25T20:19:49.442 exceeded by 24us
deadline 2023-07-25T20:19:49.442 exceeded by 24us
    {}
    cleos  trace_api_plugin.cpp:288 operator()

Instead of:

./cleos --verbose --print-response get block_trace 20
RESPONSE:
---------------------
{
  "code": 404,
  "message": "Trace API: block trace missing",
  "error": {
    "code": 0,
    "name": "",
    "what": "",
    "details": []
  }
}
---------------------
Error 3200005: http request fail
Error Details:
Error code 404
: {"code":404,"message":"Trace API: block trace missing","error":{"code":0,"name":"","what":"","details":[]}}

Resolves #1433

[greg7mdp]

Probably you should either check except_called == true here, or remove the variable alltogether.

[greg7mdp]

PS: cool test. Did you make up the abi out of thin air?

[heifner]

Thanks. I meant to add a check for that. Added.
It was copied from another test. Originally hand-crafted.

[greg7mdp]

Why do it in 2 steps, and not:
cmd="%s %s --print-response %s %d" % (Utils.EosClientPath, node.eosClientArgs(), cmdDesc, blockNum)

[heifner]

No reason except that it was copied from another location that builds it up similar.