From fd87cd4c54946521cacc28e37addfd50ce821f9c Mon Sep 17 00:00:00 2001
From: Roman Khimov <roman@nspcc.ru>
Date: Wed, 25 Aug 2021 11:20:43 +0300
Subject: [PATCH] vm: fix (*Stack).Clear to clean up references

---
 pkg/vm/stack.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/vm/stack.go b/pkg/vm/stack.go
index 8a300628a..f94023f34 100644
--- a/pkg/vm/stack.go
+++ b/pkg/vm/stack.go
@@ -141,6 +141,9 @@ func initStack(s *Stack, n string, refc *refCounter) {
 // Clear clears all elements on the stack and set its length to 0.
 func (s *Stack) Clear() {
 	if s.elems != nil {
+		for _, el := range s.elems {
+			s.refs.Remove(el.value)
+		}
 		s.elems = s.elems[:0]
 	}
 }