From 69b485012faa67e14042b8f7f034a30086f5789b Mon Sep 17 00:00:00 2001
From: Yilou Wang <wangyilou123@gmail.com>
Date: Sun, 1 Mar 2026 23:16:37 +0100
Subject: [PATCH] fix leak

---
 src/V3Randomize.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/V3Randomize.cpp b/src/V3Randomize.cpp
index 25f13a704..d7333a1f1 100644
--- a/src/V3Randomize.cpp
+++ b/src/V3Randomize.cpp
@@ -3631,6 +3631,14 @@ class RandomizeVisitor final : public VNVisitor {
                 constrExprp->replaceWith(chainp);
                 VL_DO_DANGLING(constrExprp->deleteTree(), constrExprp);
             }
+
+            // Clean up nodes used only as clone templates (never inserted into tree)
+            for (auto& bucket : buckets) {
+                VL_DO_DANGLING(bucket.weightExprp->deleteTree(), bucket.weightExprp);
+            }
+            VL_DO_DANGLING(runningSump->deleteTree(), runningSump);
+            // Last cumSum is unused (last bucket is unconditional default)
+            VL_DO_DANGLING(cumSums.back()->deleteTree(), cumSums.back());
         }
     }