Custom GraphQLScalarType instance: parseLiteral is called twice

[royalcala]

The parseLiteral method is called twice

const express_graphql = require('express-graphql')
var { buildSchema } = require('graphql')

var OddType = new GraphQLScalarType({
  name: 'Odd',
  parseLiteral(ast) {
   console. log('this print twice before continue with the resolver')
    return null
}
}

[IvanGoncharov]

@createcsoft Thanks for taking the time to report this issue 👍
It was already reported as #383 so I'm closing this as a duplicate.

[applegrew]

I have faced this issue, but the issue in my case is with Mercurius. It first runs buildContext which evaluates the variables, then it fires execute which again fires buildContext which in-turn again executes the variables. (ref: https://github.com/mercurius-js/mercurius/blob/master/index.js#L507)