From 9d7efca8a587677c73f9c847ba0f09ce220e5a75 Mon Sep 17 00:00:00 2001
From: heck <heck@pep.foundation>
Date: Mon, 5 Jul 2021 16:04:49 +0200
Subject: [PATCH] JNI-160: close() on obj with handle == 0 does nothing (no
 decrement either)

---
 src/codegen/gen_java_Message.ysl2 | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/codegen/gen_java_Message.ysl2 b/src/codegen/gen_java_Message.ysl2
index 7c3b201..1cc2404 100644
--- a/src/codegen/gen_java_Message.ysl2
+++ b/src/codegen/gen_java_Message.ysl2
@@ -69,9 +69,11 @@ tstylesheet {
                 }
 
                 public final void close() {
-                    release(handle);
-                    handle = 0;
-                    instanceCount--;
+                    if(handle != 0) {
+                        release(handle);
+                        handle = 0;
+                        instanceCount--;
+                    }
                 }
 
                 public static int getInstanceCount() {