FFI: Turn FFI finalizer table into a proper GC root.

Reported by Sergey Bronnikov. #1168

1 files changed, 3 insertions, 0 deletions

diff --git a/src/lj_obj.h b/src/lj_obj.h
index 2d4386e1..c0817663 100644
--- a/src/lj_obj.h
+++ b/src/lj_obj.h
@@ -579,6 +579,9 @@ typedef enum {
   GCROOT_BASEMT_NUM = GCROOT_BASEMT + ~LJ_TNUMX,
   GCROOT_IO_INPUT,      /* Userdata for default I/O input file. */
   GCROOT_IO_OUTPUT,     /* Userdata for default I/O output file. */
+#if LJ_HASFFI
+  GCROOT_FFI_FIN,       /* FFI finalizer table. */
+#endif
   GCROOT_MAX
 } GCRootID;