From 541d00366c30fafec33468b059495db236fba06a Mon Sep 17 00:00:00 2001
From: Tejas <tejasae-afk@users.noreply.github.com>
Date: Fri, 17 Apr 2026 21:16:27 -0400
Subject: [PATCH] Synchronized block locks on a mutable field

---
 .../impl/xpath/regex/RegularExpression.java    | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/composite-builds/build-deps/jaxp/src/main/java/jaxp/sun/org/apache/xerces/internal/impl/xpath/regex/RegularExpression.java b/composite-builds/build-deps/jaxp/src/main/java/jaxp/sun/org/apache/xerces/internal/impl/xpath/regex/RegularExpression.java
index 926b78a57d..779729ac6a 100644
--- a/composite-builds/build-deps/jaxp/src/main/java/jaxp/sun/org/apache/xerces/internal/impl/xpath/regex/RegularExpression.java
+++ b/composite-builds/build-deps/jaxp/src/main/java/jaxp/sun/org/apache/xerces/internal/impl/xpath/regex/RegularExpression.java
@@ -722,15 +722,17 @@ public boolean matches(char[]  target, Match match) {
      */
     public boolean matches(char[] target, int start, int end, Match match) {
 
+        Context ctx;
         synchronized (this) {
             if (this.operations == null)
                 this.prepare();
             if (this.context == null)
                 this.context = new Context();
+            ctx = this.context;
         }
         Context con = null;
-        synchronized (this.context) {
-            con = this.context.inuse ? new Context() : this.context;
+        synchronized (ctx) {
+            con = ctx.inuse ? new Context() : ctx;
             con.reset(target, start, end, this.numberOfClosures);
         }
         if (match != null) {
@@ -907,15 +909,17 @@ public boolean matches(String  target, Match match) {
      */
     public boolean matches(String  target, int start, int end, Match match) {
 
+        Context ctx;
         synchronized (this) {
             if (this.operations == null)
                 this.prepare();
             if (this.context == null)
                 this.context = new Context();
+            ctx = this.context;
         }
         Context con = null;
-        synchronized (this.context) {
-            con = this.context.inuse ? new Context() : this.context;
+        synchronized (ctx) {
+            con = ctx.inuse ? new Context() : ctx;
             con.reset(target, start, end, this.numberOfClosures);
         }
         if (match != null) {
@@ -1586,15 +1590,17 @@ public boolean matches(CharacterIterator  target, Match match) {
 
 
 
+        Context ctx;
         synchronized (this) {
             if (this.operations == null)
                 this.prepare();
             if (this.context == null)
                 this.context = new Context();
+            ctx = this.context;
         }
         Context con = null;
-        synchronized (this.context) {
-            con = this.context.inuse ? new Context() : this.context;
+        synchronized (ctx) {
+            con = ctx.inuse ? new Context() : ctx;
             con.reset(target, start, end, this.numberOfClosures);
         }
         if (match != null) {