Missing all metadata for custom error

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
haskell
Domain
compilers

Research direction

Start by locating the compiler path that creates UserDefinedWarning and determine how its source position and filename are obtained. Reproduce the 0.15.14 behavior if possible, then trace the metadata construction; done means UserDefinedWarning diagnostics include at least a position and filename, with coverage for the reported case.

Written by the indexing model from the issue text.

Description

type: bug

Description

I discovered a debug error in the compiler without any metadata.

    {
      "position": null,
      "message": "  A custom warning occurred while solving type class constraints:\n\n    Debug function usage\n",
      "errorCode": "UserDefinedWarning",
      "errorLink": "https://github.com/purescript/documentation/blob/master/errors/UserDefinedWarning.md",
      "filename": null,
      "moduleName": null,
      "suggestion": null,
      "allSpans": []
    },

To Reproduce

I have no idea how this happened unfortunately :(

Expected behavior

Expected all UserDefinedWarnings to at least have a position and filename

Additional context

PureScript version

0.15.14

Dominant language
Haskell
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