From 00b18f67cf97d2ea3f03c1e826933020f20177c5 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Sun, 19 Mar 2023 12:46:15 +0100
Subject: [PATCH] #2685 indeterminate upper bound formatting

---
 src/ifcopenshell-python/ifcopenshell/validate.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ifcopenshell-python/ifcopenshell/validate.py b/src/ifcopenshell-python/ifcopenshell/validate.py
index 275459420a..73e5252e2f 100644
--- a/src/ifcopenshell-python/ifcopenshell/validate.py
+++ b/src/ifcopenshell-python/ifcopenshell/validate.py
@@ -125,7 +125,7 @@ def assert_valid_inverse(attr, val, schema):
         aggr = attr.type_of_aggregation_string().upper()
 
         if aggr:
-            aggr_str = f'{aggr} [{b1}:{b2}] OF '
+            aggr_str = f'{aggr} [{b1}:{'?' if b2 == -1 else b2}] OF '
         else:
             aggr_str = ''