data: very roughly respect pre-existing property descriptors

This is some nonsense. Should be better integrated later on so as
to support general implicit property descriptor inheritance, but
this allows for Thing itself to describe properties that every
Thing instance should have, at least.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/data/things/index.js b/src/data/things/index.js
index 01a8198b..4f87f492 100644
--- a/src/data/things/index.js
+++ b/src/data/things/index.js
@@ -142,7 +142,10 @@ function evaluatePropertyDescriptors() {
         }
       }
 
-      constructor[CacheableObject.propertyDescriptors] = results;
+      constructor[CacheableObject.propertyDescriptors] = {
+        ...constructor[CacheableObject.propertyDescriptors] ?? {},
+        ...results,
+      };
     },
 
     showFailedClasses(failedClasses) {