fix(liveslots): better error message when buildRootObject is not Far

Agoric · Jun 16, 2021 · 34568a9 · 34568a9
1 parent d05eeb2
commit 34568a9
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/packages/SwingSet/src/kernel/liveSlots.js b/packages/SwingSet/src/kernel/liveSlots.js
@@ -977,7 +977,11 @@ function build(
 
     // here we finally invoke the vat code, and get back the root object
     const rootObject = buildRootObject(harden(vpow), harden(vatParameters));
-    assert.equal(passStyleOf(rootObject), 'remotable');
+    assert.equal(
+      passStyleOf(rootObject),
+      'remotable',
+      `buildRootObject() (${buildRootObject}) returned ${rootObject}, which is not Far`,
+    );
 
     const rootSlot = makeVatSlot('object', true, BigInt(0));
     valToSlot.set(rootObject, rootSlot);