--- old/src/jdk.incubator.jextract/share/classes/jdk/internal/clang/AllocationScope.java	2020-01-09 12:21:23.000000000 +0530
+++ new/src/jdk.incubator.jextract/share/classes/jdk/internal/clang/AllocationScope.java	2020-01-09 12:21:22.000000000 +0530
@@ -49,8 +49,9 @@
 
     @Override
     public void close() {
+        var currentThread = Thread.currentThread();
         segments.stream()
-                .filter(MemorySegment::isAccessible)
+                .filter(ms -> ms.owner() == currentThread)
                 .forEach(MemorySegment::close);
     }
 }