Null assertion error when a null Locale is set into Validation code #2907
Description
Describe the bug
I'm writing this down as a note but will fill in more information has it comes.
I've just upgraded from 18.2 to 19.0 and am not experiencing a number of errors that look like I'm getting a ton of errors of the form
=> graphql.AssertException: Object required to be not null
graphql.Assert.assertNotNull(Assert.java:31)
graphql.i18n.I18n.<init>(I18n.java:37)
graphql.i18n.I18n.i18n(I18n.java:46)
graphql.validation.Validator.validateDocument(Validator.java:68)
graphql.ParseAndValidate.validate(ParseAndValidate.java:111)
graphql.GraphQL.validate(GraphQL.java:628)
graphql.GraphQL.parseAndValidate(GraphQL.java:591)
graphql.GraphQL.lambda$parseValidateAndExecute$10(GraphQL.java:555)
graphql.execution.preparsed.NoOpPreparsedDocumentProvider.getDocument(NoOpPreparsedDocumentProvider.java:15)
graphql.execution.preparsed.PreparsedDocumentProvider.getDocumentAsync(PreparsedDocumentProvider.java:4
looking through the changelog this most likely relates to #2878
it looks like this is failing on a null locale --
To Reproduce
Please provide a code example or even better a test to reproduce the bug.