1 files changed, 8 insertions, 0 deletions
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDummyUpstreamSurfaceHook.java b/src/jogl/classes/jogamp/opengl/egl/EGLDummyUpstreamSurfaceHook.java
index 6c11b3bdc..890dab8f7 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLDummyUpstreamSurfaceHook.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDummyUpstreamSurfaceHook.java
@@ -1,5 +1,6 @@
 package jogamp.opengl.egl;
 
+import com.jogamp.common.ExceptionUtils;
 import com.jogamp.nativewindow.NativeSurface;
 import com.jogamp.nativewindow.ProxySurface;
 import com.jogamp.nativewindow.UpstreamSurfaceHook;
@@ -8,6 +9,8 @@ import com.jogamp.nativewindow.UpstreamSurfaceHookMutableSize;
 import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
 import com.jogamp.opengl.egl.EGL;
 
+import jogamp.nativewindow.ProxySurfaceImpl;
+
 /** Uses a PBuffer offscreen surface */
 public class EGLDummyUpstreamSurfaceHook extends UpstreamSurfaceHookMutableSize {
     /**
@@ -50,6 +53,11 @@ public class EGLDummyUpstreamSurfaceHook extends UpstreamSurfaceHookMutableSize
             }
             eglDevice.lock();
             try {
+                if( EGLDrawable.DEBUG ) {
+                    System.err.println(EGLSurface.getThreadName()+": EGLDummyUpstreamSurfaceHook: EGL.eglDestroySurface: 0x"+Long.toHexString(s.getSurfaceHandle()));
+                    ProxySurfaceImpl.dumpHierarchy(System.err, s);
+                    ExceptionUtils.dumpStack(System.err);
+                }
                 EGL.eglDestroySurface(eglDevice.getHandle(), s.getSurfaceHandle());
                 s.setSurfaceHandle(EGL.EGL_NO_SURFACE);
                 s.clearUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE );