gc: bug in --free-all --vg-debug combination.

* gc.c (gc_free_all): Mark defined the current block being
iterated, not the next one.  Otherwise Valgrind generates
numerous false errors from accesses to free objects in the
first block. Not to mention that next is a null pointer in
the last iteration.

1 files changed, 1 insertions, 1 deletions

diff --git a/gc.c b/gc.c
index dea37403..9d5897b4 100644
--- a/gc.c
+++ b/gc.c
@@ -998,7 +998,7 @@ void gc_free_all(void)
 
 #if HAVE_VALGRIND
       if (opt_vg_debug)
-        VALGRIND_MAKE_MEM_DEFINED(&next->block, sizeof next->block);
+        VALGRIND_MAKE_MEM_DEFINED(&iter->block, sizeof iter->block);
 #endif
 
       for (block = iter->block, end = iter->block + HEAP_SIZE;