shopify-scripts: Undefined method_missing null pointer dereference

It's possible to segfault mruby by undefining BasicObjectmethodmissing in certain cases. There is a fallback methodmissing C function mrbmethodmissing which is called in some cases when the VM fails to look up the methodmissing method: BasicObject.removemethod:methodmissing; 1.foo NoMethodError:...