diff --git a/src/racket/gc2/backtrace.c b/src/racket/gc2/backtrace.c
index dab7299429..69882a42df 100644
--- a/src/racket/gc2/backtrace.c
+++ b/src/racket/gc2/backtrace.c
@@ -47,7 +47,7 @@ static void *print_out_pointer(const char *prefix, void *p,
 
   page = pagemap_find_page(GC_instance->page_maps, p);
   if (!page || (trace_page_type(page) == TRACE_PAGE_BAD)) {
-    GCPRINT(GCOUTF, "%s%s %p %p\n", prefix, trace_source_kind(*_kind), p);
+    GCPRINT(GCOUTF, "%s%s %p\n", prefix, trace_source_kind(*_kind), p);
     return NULL;
   }
   p = trace_pointer_start(page, p);
diff --git a/src/racket/gc2/newgc.c b/src/racket/gc2/newgc.c
index b4abf7009d..f456871d90 100644
--- a/src/racket/gc2/newgc.c
+++ b/src/racket/gc2/newgc.c
@@ -351,6 +351,10 @@ inline static void check_used_against_max(NewGC *gc, size_t len)
   page_count = size_to_apage_count(len);
   gc->used_pages += page_count;
 
+#if MZ_GC_BACKTRACE
+  if (gc->dumping_avoid_collection) return;
+#endif
+
   if(gc->in_unsafe_allocation_mode) {
     if(gc->used_pages > gc->max_pages_in_heap)
       gc->unsafe_allocation_abort(gc);
@@ -3412,6 +3416,12 @@ static void *trace_pointer_start(mpage *page, void *p) {
 const char *trace_source_kind(int kind)
 {
   switch (kind) {
+  case PAGE_TAGGED: return "_TAGGED";
+  case PAGE_ATOMIC: return "_ATOMIC";
+  case PAGE_ARRAY: return "_ARRAY";
+  case PAGE_TARRAY: return "_TARRAY";
+  case PAGE_PAIR: return "_PAIR";
+  case PAGE_BIG: return "_BIG";
   case BT_STACK: return "STACK";
   case BT_ROOT: return "ROOT";
   case BT_FINALIZER: return "FINALIZER";