coffeescript mapping invalid

[felickz]

Test repo:https://github.com/vulna-felickz/coffeescript-test

To transpile to js and generate map:

npm install -g coffeescript
coffee --compile --map *.coffee

Error

python3 remap_sarif.py javascript.sarif "." --output after-javascript.sarif

Outputs

When uploading to code scanning - cannot generate fingerprint as it maps to invalid line 0

    {
        "path": [
        "runs",
        0,
        "results",
        0,
        "locations",
        0,
        "physicalLocation",
        "region",
        "startLine"
        ],
        "property": "instance.runs[0].results[0].locations[0].physicalLocation.region.startLine",
        "message": "must be greater than or equal to 1",
        "schema": {
        "description": "The line number of the first character in the region.",
        "type": "integer",
        "minimum": 1
        },
        "instance": 0,
        "name": "minimum",
        "argument": 1,
        "stack": "instance.runs[0].results[0].locations[0].physicalLocation.region.startLine must be greater than or equal to 1"
    }

Though - the source-map-visualization tool appears to map it OK

• see repro here

JS-Map.zip

[felickz]

I plugged in JS source-map from mozilla and it appears to properly map -- not sure if there is a better python lib here?: