GraphiQL not working in v2.12.0

[bloomcake]

• What is the current behavior?

In version v2.12.0 the GraphiQL playground no longer works. I always get the error Cannot read property '1' of null in my response. In version v2.11.1 everything works fine.

• Please tell us about your environment:

  • Version: graphene-django v2.12.0; graphene v2.1.8
  • Platform: Linux Ubuntu 20.04

[jkimbo]

I can reproduce this issue. Looking into it now.

[eabruzzese]

@grebsai As a quick workaround, give your query a name:

query MyQuery {
  allNames {
    id
    title
  }
}

I'll fix this shortly.