From a97c82765645a7f8223dc612a433ef2207a85d20 Mon Sep 17 00:00:00 2001
From: Tatu Saloranta <tatu.saloranta@iki.fi>
Date: Sun, 19 Oct 2025 18:11:03 -0700
Subject: [PATCH 1/2] DEBUG: add print outs for troubleshooting

---
 src/main/java/tools/jackson/core/util/BufferRecycler.java | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/main/java/tools/jackson/core/util/BufferRecycler.java b/src/main/java/tools/jackson/core/util/BufferRecycler.java
index 944996ef44..3ae1e12ac5 100644
--- a/src/main/java/tools/jackson/core/util/BufferRecycler.java
+++ b/src/main/java/tools/jackson/core/util/BufferRecycler.java
@@ -159,8 +159,10 @@ public byte[] allocByteBuffer(int ix, int minSize) {
         }
         byte[] buffer = _byteBuffers.getAndSet(ix, null);
         if (buffer == null || buffer.length < minSize) {
+System.err.print(" [Ab"+ix+"]");
             buffer = balloc(minSize);
         }
+else System.err.print(" [Ub"+ix+"]");
         return buffer;
     }
 
@@ -168,9 +170,11 @@ public void releaseByteBuffer(int ix, byte[] buffer) {
         // 13-Jan-2024, tatu: [core#1186] Replace only if beneficial:
         byte[] oldBuffer = _byteBuffers.get(ix);
         if ((oldBuffer == null) || buffer.length > oldBuffer.length) {
+System.err.print(" [Rb"+ix+"]");
             // Could use CAS, but should not really matter
             _byteBuffers.set(ix, buffer);
         }
+else System.err.print(" [FailRb"+ix+"]");
     }
 
     /*
@@ -190,8 +194,10 @@ public char[] allocCharBuffer(int ix, int minSize) {
         }
         char[] buffer = _charBuffers.getAndSet(ix, null);
         if (buffer == null || buffer.length < minSize) {
+System.err.print(" [Ac"+ix+"]");
             buffer = calloc(minSize);
         }
+        else System.err.print(" [Uc"+ix+"]");
         return buffer;
     }
 
@@ -199,9 +205,11 @@ public void releaseCharBuffer(int ix, char[] buffer) {
         // 13-Jan-2024, tatu: [core#1186] Replace only if beneficial:
         char[] oldBuffer = _charBuffers.get(ix);
         if ((oldBuffer == null) || buffer.length > oldBuffer.length) {
+System.err.print(" [Rc"+ix+"]");
             // Could use CAS, but should not really matter
             _charBuffers.set(ix, buffer);
         }
+else System.err.print(" [FailRc"+ix+"]");
     }
 
     /*

From e9233d4dfa56625482f9b6778689c767de690062 Mon Sep 17 00:00:00 2001
From: Tatu Saloranta <tatu.saloranta@iki.fi>
Date: Sun, 19 Oct 2025 18:17:29 -0700
Subject: [PATCH 2/2] ...

---
 src/main/java/tools/jackson/core/util/BufferRecycler.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/main/java/tools/jackson/core/util/BufferRecycler.java b/src/main/java/tools/jackson/core/util/BufferRecycler.java
index 3ae1e12ac5..86a77e2d1f 100644
--- a/src/main/java/tools/jackson/core/util/BufferRecycler.java
+++ b/src/main/java/tools/jackson/core/util/BufferRecycler.java
@@ -167,6 +167,7 @@ public byte[] allocByteBuffer(int ix, int minSize) {
     }
 
     public void releaseByteBuffer(int ix, byte[] buffer) {
+Objects.requireNonNull(buffer);
         // 13-Jan-2024, tatu: [core#1186] Replace only if beneficial:
         byte[] oldBuffer = _byteBuffers.get(ix);
         if ((oldBuffer == null) || buffer.length > oldBuffer.length) {
@@ -202,6 +203,7 @@ public char[] allocCharBuffer(int ix, int minSize) {
     }
 
     public void releaseCharBuffer(int ix, char[] buffer) {
+Objects.requireNonNull(buffer);
         // 13-Jan-2024, tatu: [core#1186] Replace only if beneficial:
         char[] oldBuffer = _charBuffers.get(ix);
         if ((oldBuffer == null) || buffer.length > oldBuffer.length) {