From 7e7284d5fc01c0a081aa79d67736f51069864a7d Mon Sep 17 00:00:00 2001
From: Matthias Baumgartner <dev@igsor.net>
Date: Thu, 12 Jan 2023 10:22:59 +0100
Subject: adapt to non-optional range in query checks

---
 bsfs/graph/resolve.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'bsfs/graph/resolve.py')

diff --git a/bsfs/graph/resolve.py b/bsfs/graph/resolve.py
index e398a5e..9b5f631 100644
--- a/bsfs/graph/resolve.py
+++ b/bsfs/graph/resolve.py
@@ -101,8 +101,8 @@ class Filter():
                     rng = subrng
             except TypeError as err:
                 raise errors.ConsistencyError(f'ranges {subrng} and {rng} are not related') from err
-        if rng is None:
-            raise errors.UnreachableError()
+        if not isinstance(rng, (bsc.Node, bsc.Literal)):
+            raise errors.BackendError(f'the range of node {node} is undefined')
         return rng
 
     def _any(self, type_: bsc.Vertex, node: ast.filter.Any) -> ast.filter.Any: # pylint: disable=unused-argument
-- 
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