Index: src/ops/core.ops
===================================================================
--- src/ops/core.ops	(revision 43396)
+++ src/ops/core.ops	(working copy)
@@ -467,6 +467,8 @@
     Parrot_pcc_merge_signature_for_tailcall(interp, parent_call_sig, this_call_sig);
 
     SUB_FLAG_TAILCALL_SET(interp->current_cont);
+    fprintf(stderr, "%s:%d: tailcall sub %p with continuation %p\n",
+            __FILE__, __LINE__, (void*)p, (void*)interp->current_cont);
     dest = VTABLE_invoke(interp, p, dest);
     goto ADDRESS(dest);
 }
Index: src/pmc/retcontinuation.pmc
===================================================================
--- src/pmc/retcontinuation.pmc	(revision 43396)
+++ src/pmc/retcontinuation.pmc	(working copy)
@@ -84,7 +84,13 @@
 
         /* recycle this PMC and make sure it doesn't get marked */
         if (!PMC_IS_NULL(from_ctx))
+        {
+            fprintf(stderr,"%s:%d: resetting continuation (SELF=%p) in context %p\n",
+                    __FILE__, __LINE__, (void*)SELF, (void*)from_ctx);
             Parrot_pcc_set_continuation(interp, from_ctx, NULL);
+        }
+        fprintf(stderr,"%s:%d: freeing myself (SELF=%p)\n",
+                __FILE__, __LINE__, (void*)SELF);
         Parrot_gc_free_pmc_header(interp, SELF);
 
         if (INTERP->code != seg)
Index: src/pmc/sub.pmc
===================================================================
--- src/pmc/sub.pmc	(revision 43396)
+++ src/pmc/sub.pmc	(working copy)
@@ -21,6 +21,8 @@
 #include "parrot/oplib/ops.h"
 #include "sub.str"
 
+static unsigned debug_counter = 0;
+
 static void
 print_sub_name(PARROT_INTERP, ARGIN_NULLOK(PMC *sub))
 {
@@ -379,8 +381,19 @@
         ccont                = INTERP->current_cont;
         INTERP->current_cont = NULL;
 
+        fprintf(stderr, "%d: %s:%d: sub %p invoked with ccont %p\n",
+                debug_counter++, __FILE__, __LINE__, (void*)SELF, (void*)ccont);
+
+#if 0
+        if (debug_counter-1 == 1592)
+            abort();
+#endif
+
         if (ccont == NEED_CONTINUATION)
+        {
             ccont = new_ret_continuation_pmc(interp, (opcode_t *)next);
+            fprintf(stderr, "created ret continuation %p\n", (void*)ccont);
+        }
 
         PARROT_ASSERT(!PMC_IS_NULL(ccont));
 
@@ -395,6 +408,8 @@
         Parrot_pcc_init_context(INTERP, context, caller_ctx);
 
         Parrot_pcc_set_sub(interp, context, SELF);
+        fprintf(stderr, "%s:%d: setting continuation %p in context %p\n",
+                __FILE__, __LINE__, (void*)ccont, (void*)context);
         Parrot_pcc_set_continuation(interp, context, ccont);
         Parrot_pcc_set_constants(interp, context, sub->seg->const_table->constants);
 
Index: src/gc/api.c
===================================================================
--- src/gc/api.c	(revision 43396)
+++ src/gc/api.c	(working copy)
@@ -94,6 +94,8 @@
 #include "parrot/gc_api.h"
 #include "gc_private.h"
 
+static unsigned debug_counter = 0;
+
 /* HEADERIZER HFILE: include/parrot/gc_api.h */
 
 /* HEADERIZER BEGIN: static */
@@ -401,6 +403,13 @@
     pmc->vtable         = NULL;
     PMC_data(pmc)       = NULL;
 
+    fprintf(stderr, "%d: created pmc %p\n", debug_counter++, (void*)pmc);
+
+#if 0
+    if (debug_counter-1 == 28455)
+        abort();
+#endif
+
     return pmc;
 }
 
@@ -421,6 +430,13 @@
     Fixed_Size_Pool * const pool = (PObj_constant_TEST(pmc)) ?
         interp->mem_pools->constant_pmc_pool : interp->mem_pools->pmc_pool;
 
+    fprintf(stderr, "%d: free pmc %p\n", debug_counter++, (void*)pmc);
+
+#if 0
+    if (debug_counter-1 == 28480)
+        abort();
+#endif
+
     Parrot_pmc_destroy(interp, pmc);
 
     PObj_flags_SETTO((PObj *)pmc, PObj_on_free_list_FLAG);