Getting a TypeError when rendering GraphiQL

[bigblind]

I also submitted an issue to the GraphiQL repo, but since it's raised from within graphql-language-interface, I thought I'd repost it here.

I'm getting the following error:

Uncaught TypeError: Cannot read property '0' of undefined
    at getDiagnostics (getDiagnostics.js?6960:46)
    at eval (lint.js?eb0c:38)
    at startLinting (lint.js?af2c:147)
    at Object.eval [as lint] (lint.js?af2c:241)
    at new CodeMirror$1 (codemirror.js?f14e:7645)
    at CodeMirror$1 (codemirror.js?f14e:7590)
    at QueryEditor.componentDidMount (QueryEditor.js?39d7:115)
    at eval (ReactCompositeComponent.js?063f:264)
    at measureLifeCyclePerf (ReactCompositeComponent.js?063f:75)
    at eval (ReactCompositeComponent.js?063f:263)

In GetDiagnostics, the error happens in the last line of the following code:

try {
    ast = (0, _graphql.parse)(queryText);
  } catch (error) {
    var range = getRange(error.locations[0], queryText);

I'm trying to put a breakpoint ether at the start of the catch block, so I can se the original error, but Chrome's dev tools won't let me.

Putting a breakpoint on the ast = ... line, all local variables are undefined, except queryText, which is equal to:

 "# Welcome to GraphiQL
#
# GraphiQL is an in-browser tool for writing, validating, and
# testing GraphQL queries.
#
# Type queries into this side of the screen, and you will see intelligent
# typeaheads aware of the current GraphQL type schema and live syntax and
# validation errors highlighted within the text.
#
# GraphQL queries typically start with a "{" character. Lines that starts
# with a # are ignored.
#
# An example GraphQL query might look like:
#
#     {
#       field(arg: "value") {
#         subField
#       }
#     }
#
# Keyboard shortcuts:
#
#       Run Query:  Ctrl-Enter (or press the play button above)
#
#   Auto Complete:  Ctrl-Space (or just start typing)
#

"

[wincent]

Let's discuss this over on the GraphiQL issue. It may or may not be the right place for it, but at least it will be one place.