wtf is juniper-variable-bug?

This repo is a small project that reproduces a specific bug in Juniper, which is a library for building GraphQL servers in Rust. It exists solely to demonstrate that something goes wrong when a GraphQL query is executed without setting a variable that the query expects. The repository contains two automated tests. One test passes: it runs a query with a null value, which works fine. The other test fails: it runs a query without setting a variable at all, and the program crashes with an error about trying to use a missing value. This failure is the bug being reported. The idea is that someone can run the tests, see the failure, and have a concrete starting point for investigating and fixing the problem in Juniper itself. The people who would use this are Juniper's maintainers or contributors who need to verify the bug, track it, and eventually confirm that a fix works. Instead of trying to describe the problem in words, the author provides a minimal, runnable example that makes the issue easy to reproduce. It is essentially a way of saying "here is exactly what breaks, here is how to see it yourself, and here is the environment where it happens." The project is straightforward and purpose-built. It does not offer a tool, feature, or solution to end users. It is a bug report in code form, tested on a specific version of the Rust compiler from 2019.