From 38662b22a607e9aa7e49046b6e923a3c19dc2f12 Mon Sep 17 00:00:00 2001
From: David Rheinsberg <david.rheinsberg@gmail.com>
Date: Mon, 25 Jul 2022 12:03:37 +0200
Subject: [PATCH] meta: fix lookup of invalid schemata

We need to initialize `schema` to `None`, otherwise it will be an access
to an uninitialized variable when looking up invalid schemata:

    [...]
      File "[...]/osbuild/meta.py", line 583, in get_schema
        schema = Schema(schema, name or klass)
    UnboundLocalError: local variable 'schema' referenced before assignment

Signed-off-by: David Rheinsberg <david.rheinsberg@gmail.com>
---
 osbuild/meta.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/osbuild/meta.py b/osbuild/meta.py
index c3f73e29..5b540f5f 100644
--- a/osbuild/meta.py
+++ b/osbuild/meta.py
@@ -564,6 +564,7 @@ class Index:
         `None` and any validation will fail.
         """
         cached_schema: Optional[Schema] = self._schemata.get((klass, name, version))
+        schema = None
 
         if cached_schema is not None:
             return cached_schema