From 962adc5e3222522d8e0de5c790d92e44a719b9ec Mon Sep 17 00:00:00 2001
From: Andrei Solntsev <andrei.solntsev@gmail.com>
Date: Tue, 29 Oct 2024 00:13:58 +0200
Subject: [PATCH] #429 [bugfix] make a copy of BFCs

otherwise they will disappear when the caller calls "clear" on its own collection.
---
 .../src/main/java/org/xhtmlrenderer/layout/LayoutState.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/flying-saucer-core/src/main/java/org/xhtmlrenderer/layout/LayoutState.java b/flying-saucer-core/src/main/java/org/xhtmlrenderer/layout/LayoutState.java
index 381198b56..33a850a74 100644
--- a/flying-saucer-core/src/main/java/org/xhtmlrenderer/layout/LayoutState.java
+++ b/flying-saucer-core/src/main/java/org/xhtmlrenderer/layout/LayoutState.java
@@ -22,6 +22,8 @@
 import org.jspecify.annotations.Nullable;
 import org.xhtmlrenderer.render.MarkerData;
 
+import java.util.ArrayDeque;
+import java.util.Collection;
 import java.util.Deque;
 
 /**
@@ -47,8 +49,8 @@ public Deque<BlockFormattingContext> getBFCs() {
         return _BFCs;
     }
 
-    public void setBFCs(Deque<BlockFormattingContext> s) {
-        _BFCs = s;
+    public void setBFCs(Collection<BlockFormattingContext> s) {
+        _BFCs = new ArrayDeque<>(s);
     }
 
     @Nullable