diff --git a/Source/NSAutoreleasePool.m b/Source/NSAutoreleasePool.m
index 781cb6c..42e35e6 100644
--- a/Source/NSAutoreleasePool.m
+++ b/Source/NSAutoreleasePool.m
@@ -41,6 +41,55 @@
 #  endif
 #endif
 
+#import <objc/runtime.h>
+#import "../../libobjc2/ivar.h"
+static void printNSThreadOffsets_BASE(void)
+{
+    static BOOL printed = NO;
+    struct objc_ivar_list *ivarList;
+    int ivarIndex;
+    NSThread *thread = GSCurrentThread();
+
+    if (printed)
+        return;
+
+    printed = YES;
+
+    ivarList = (struct objc_ivar_list *) class_getIvarLayout([NSThread class]);
+
+    if (!ivarList)
+        return;
+
+    printf("\nBASE:\n");
+    printf(" class_getIvarLayout([NSThread class])\n");
+
+    for (ivarIndex=0; ivarIndex<ivarList->count; ivarIndex++)
+    {
+        printf("   %s : %d\n", ivarList->ivar_list[ivarIndex].name, 
+                ivarList->ivar_list[ivarIndex].offset);
+    }
+
+    printf("\n");
+
+    if (!thread)
+        return;
+
+    printf(" Current thread from GSCurrentThread(): %p\n", thread);
+    printf("   thread->_target: %p (%ld)\n", &thread->_target, (long) &thread->_target - (long) thread); 
+    printf("   thread->_arg: %p (%ld)\n", &thread->_arg, (long) &thread->_arg - (long) thread); 
+    printf("   thread->_selector: %p (%ld)\n", &thread->_selector, (long) &thread->_selector - (long) thread); 
+    printf("   thread->_name: %p (%ld)\n", &thread->_name, (long) &thread->_name - (long) thread); 
+    printf("   thread->_stackSize: %p (%ld)\n", &thread->_stackSize, (long) &thread->_stackSize - (long) thread); 
+    printf("   thread->_cancelled: %p (%ld)\n", &thread->_cancelled, (long) &thread->_cancelled - (long) thread); 
+    printf("   thread->_active: %p (%ld)\n", &thread->_active, (long) &thread->_active - (long) thread); 
+    printf("   thread->_finished: %p (%ld)\n", &thread->_finished, (long) &thread->_finished - (long) thread); 
+    printf("   thread->_exception_handler: %p (%ld)\n", &thread->_exception_handler, (long) &thread->_exception_handler - (long) thread); 
+    printf("   thread->_thread_dictionary: %p (%ld)\n", &thread->_thread_dictionary, (long) &thread->_thread_dictionary - (long) thread); 
+    printf("   thread->_autorelease_vars: %p (%ld)\n", &thread->_autorelease_vars, (long) &thread->_autorelease_vars - (long) thread); 
+    printf("   thread->_gcontext: %p (%ld)\n", &thread->_gcontext, (long) &thread->_gcontext - (long) thread); 
+    printf("   thread->_runLoopInfo: %p (%ld)\n", &thread->_runLoopInfo, (long) &thread->_runLoopInfo - (long) thread); 
+    printf("\n");
+}
 
 
 
@@ -562,6 +611,8 @@ pop_pool_from_cache (struct autorelease_thread_vars *tv)
 {
   struct autorelease_thread_vars *tv = ARP_THREAD_VARS;
 
+printNSThreadOffsets_BASE();
+
   if (UINT_MAX == _released_count)
     {
       [NSException raise: NSInternalInconsistencyException