diff --git a/Sources/wired3/Controllers/IndexController.swift b/Sources/wired3/Controllers/IndexController.swift
index 121297e5..b44db147 100644
--- a/Sources/wired3/Controllers/IndexController.swift
+++ b/Sources/wired3/Controllers/IndexController.swift
@@ -223,9 +223,13 @@ public class IndexController: TableController {
             // If cancelled, forceReindex() has already queued a fresh rebuild via
             // indexQueue.async; letting pendingRebuild fire here too would cause a
             // redundant extra traversal immediately after the forced one.
+            //
+            // IMPORTANT: use indexQueue.async, not a direct recursive call.
+            // A synchronous call here overflows the stack when finalisation keeps
+            // failing (pendingRebuild stays true → 400+ frames → SIGBUS).
             if !wasCancelled && pendingRebuild {
                 pendingRebuild = false
-                performFullRebuild()
+                indexQueue.async { [weak self] in self?.performFullRebuild() }
             }
         }