message: Warn on GraphQL parser exceptions
  Fix silent parsing failure
  When GraphQL `parse` fails to parse a file errors are silently
  ignored.
  Was having an issue with a whitespace character in one of our
  `.graphql` files which was rather difficult to trace.
diff: @@ -185,7 +185,11 @@ export function loadQueryDocuments(
  .map(source => {
  try {
  return parse(source!);
  - } catch {
  + } catch (e) {
  + const name = (source && source.name) || "";
  + console.warn(stripIndents`
  + Warning: error parsing GraphQL file ${name}
  + ${e.stack}`);
  return null;
  }
  })
  