How can I catch a type error at runtime?

[special-character]

I am working on catching a developer error where we accidentally had a mis-match between our client and server. The client had updated code that requested a type from an endpoint that had it's type changed.

This was the error:

"error":
Field "validUser" must not have a selection since type "Boolean" has no subfields. GraphQL request

The endpoint still had the Boolean field but our resolver was requesting data for a full user.

 t.field('validUser', {
      type: 'User', // This used to be Boolean
....

I can repro this level of error by returning the wrong type.

 t.field('validUser', {
      type: 'User',
      resolve: async (_parent, _args, ctx) => {
        try {
          return true
        } catch (err) {
          console.log('ERRRRRRRRR', err)
        }

The try catch is never hit b/c the error happens before it makes it here. Even my error middleware is not hit b/c the type error happens before it makes it that far.