From 09cb28e5b0fb1469cdd8695d91ba4780033c4603 Mon Sep 17 00:00:00 2001
From: Karim Jerbi <k4rim.jerbi@gmail.com>
Date: Sat, 17 Oct 2026 23:59:32 +0100
Subject: [PATCH] feat: validate reverse Lookup inputs

Restrict geometry updates to finite UpdatedDistance columns and reject unsupported mappings atomically.
---
 src/scene/block_lookup.rs       | 14 ++++++++++++++
 src/scene/block_lookup/tests.rs |  8 ++++++++
 2 files changed, 22 insertions(+)

diff --git a/src/scene/block_lookup.rs b/src/scene/block_lookup.rs
index b9b11acf2..d4f192b47 100644
--- a/src/scene/block_lookup.rs
+++ b/src/scene/block_lookup.rs
@@ -226,6 +226,13 @@ fn reference_row(
             if property.lookup_property {
                 return true;
             }
+            if property.value_type != 40
+                || !property
+                    .connection_name
+                    .eq_ignore_ascii_case("UpdatedDistance")
+            {
+                return false;
+            }
             let Some(parameter) = params.iter().find(|p| p.id == property.node_id) else {
                 return false;
             };
@@ -331,6 +338,13 @@ pub(crate) fn evaluate_reference_value(
         if property.lookup_property {
             continue;
         }
+        if property.value_type != 40
+            || !property
+                .connection_name
+                .eq_ignore_ascii_case("UpdatedDistance")
+        {
+            return Err("This Lookup input property is unsupported.");
+        }
         let parameter = parameters
             .iter()
             .find(|parameter| parameter.id == property.node_id)
diff --git a/src/scene/block_lookup/tests.rs b/src/scene/block_lookup/tests.rs
index b8b777350..730232a82 100644
--- a/src/scene/block_lookup/tests.rs
+++ b/src/scene/block_lookup/tests.rs
@@ -291,6 +291,14 @@ fn lookup_reverse_selection_evaluates_saved_reference_geometry() {
             .unwrap()
             .is_none()
     );
+
+    let mut unsupported = document.clone();
+    let (_, mut malformed) = table(&unsupported, definition, lookup).unwrap().unwrap();
+    malformed.columns[0].connection_name = "UpdatedAngle".into();
+    apply_table(&mut unsupported, definition, lookup, malformed).unwrap();
+    let before = unsupported.clone();
+    assert!(evaluate_reference_choice(&unsupported, insert, "Large").is_err());
+    assert_eq!(unsupported, before);
 }
 
 #[test]