Cannot delete property 'ctx' of MoleculerClientError

[Dmitriy]

After throwing any error from action I get

{
  "errors": [
    {
      "message": "Cannot delete property 'ctx' of MoleculerClientError: Invalid role",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "nodesList"
      ],
      "extensions": {
        "code": "INTERNAL_SERVER_ERROR",
        "exception": {
          "stacktrace": [
            "TypeError: Cannot delete property 'ctx' of MoleculerClientError: Invalid role",
            "    at .../node_modules/moleculer-apollo-server/src/service.js:121:8"
          ]
        }
      }
    }
  ],
  "data": null,
  "extensions": {}
}

[Shawn McKnight]

Line 121 of service.js is attempting to delete the ctx property from the error object:

if (err && err.ctx) {
  delete err.ctx; // Avoid circular JSON
}

The error seems to be thrown by the interpreter here, but a Google search hasn't turned up anything for me regarding an "Invalid role" message, so I'm not sure what's causing that.

Running the example posts service with the nullIfError flag set to false emits the proper error and does not run into this TypeError. In our environment we throw errors regularly and don't run into this.

Can you provide more information / code sample of what service looks like? What node version are you running?

[Dmitriy]

@shawnmcknight

"Invalid role" - is my custom error message.

I think this error appears with new version of moleculer.

Tried to install "moleculer": "^0.14.0-beta4" to "simple" example from this repo and throw error in "hello" handler and "Cannot delete property 'ctx'" error appears.

[Icebob]

In 0.14 the err.ctx is a not enumerable property, so no need to delete it because it won't cause problem when you print or serialize the err. By the way it is a writable property, so maybe we can change this line to err.ctx = null instead of delete err.ctx.