internal debug support: reduce noise from sweep_one.

* gc.c (sweep_one): If the swept object matches the break_obj,
only log it if the object isn't free. Otherwise if break_obj
is sitting on the free list, we will uselessly report on it on
every sweep operation, which is very often under --gc-debug
torture operation.

1 files changed, 1 insertions, 1 deletions

diff --git a/gc.c b/gc.c
index 19032cbe..178e1cc6 100644
--- a/gc.c
+++ b/gc.c
@@ -521,7 +521,7 @@ static int sweep_one(obj_t *block)
 #endif
 
 #if CONFIG_EXTRA_DEBUGGING
-  if (block == break_obj) {
+  if (block == break_obj && (block->t.type & FREE) == 0) {
 #if HAVE_VALGRIND
     VALGRIND_PRINTF_BACKTRACE("object %p swept (type = %x)\n",
                               convert(void *, block),