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-rw-r--r--src/alloc.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/src/alloc.c b/src/alloc.c
index c5ae8b53ddc..d58532b97ff 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -6014,9 +6014,7 @@ mark_glyph_matrix (struct glyph_matrix *matrix)
all the references contained in it. */
#define LAST_MARKED_SIZE 500
-/* This is not static to prevent it from being optimized away in an
- optimized build, which then makes debugging GC problems harder. */
-Lisp_Object last_marked[LAST_MARKED_SIZE];
+Lisp_Object last_marked[LAST_MARKED_SIZE] EXTERNALLY_VISIBLE;
static int last_marked_index;
/* For debugging--call abort when we cdr down this many