CWL generation: invalid result with output_type=File(), selector=Stdout() → "outputEval: _stderr"

[mr-c]

outputs:
- id: result
  label: result
  type: File
  outputBinding:
    glob: _stdout
    outputEval: _stderr
    loadContents: false

The outputEval: _stderr is nonsensical here

From

hello_janis.py

from typing import List, Optional, Dict, Any

from janis_core import *
from janis_core.types.common_data_types import File

Optionalexample_Dev = CommandToolBuilder(
    tool="OptionalExample",
    base_command=["echo", "Hello, World!"],
    inputs=[],
    outputs=[
        ToolOutput(
            tag="result",
            output_type=File(),
            selector=Stdout(subtype=File(), optional=False),
            doc=OutputDocumentation(doc=None),
        )
    ],
    container="ubuntu:latest",
    version="DEV",
)


if __name__ == "__main__":
    Optionalexample_Dev().translate("cwl")

[mr-c]

FYI, that example above is a variation on the output of fromwdl using the following.

version 1.0                                                                     
                                                                                
                                                                                
task OptionalExample {                                                          
    input {                                                                     
    }                                                                           
                                                                                
    command {                                                                   
       echo Hello, world!                                                       
    }                                                                           
                                                                                
    output {                                                                    
        File result = stdout()                                                  
    }                                                                           
                                                                                
    runtime {                                                                   
        memory: 1                                                               
    }                                                                           
                                                                                
}

So maybe fromwdl should be updated to use generate ToolOutput(tag="result",output_type=Stdout) instead