From a308dada74cc97c77bd9ee72b44409cf0b0de09c Mon Sep 17 00:00:00 2001
From: Lele Gaifax <lele@metapensiero.it>
Date: Tue, 15 Nov 2022 21:07:10 +0100
Subject: [PATCH] Add an explaining message to the should-not-get-there
 assertion

---
 lib/sqlalchemy/dialects/postgresql/ranges.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/sqlalchemy/dialects/postgresql/ranges.py b/lib/sqlalchemy/dialects/postgresql/ranges.py
index f5bb72da34..a4c39d0639 100644
--- a/lib/sqlalchemy/dialects/postgresql/ranges.py
+++ b/lib/sqlalchemy/dialects/postgresql/ranges.py
@@ -561,8 +561,7 @@ class Range(Generic[_T]):
             else:
                 return Range(oupper, supper, bounds=rlower_b + supper_b)
 
-        # TODO: figure out if I handled all the cases above
-        assert False
+        assert False, f"Unhandled case computing {self} - {other}"
 
     __sub__ = difference
 
-- 
2.47.3