+added an _ONGC macro.

core/my_basic.c

@@ -1703,6 +1703,9 @@ static void _real_to_str(real_t r, char* str, size_t size, size_t afterpoint);
 		default: break; \
 		} \
 	}
+#ifndef _ONGC
+#	define _ONGC(__s, __g, __c) do { ((void)(__s)); ((void)(__g)); ((void)(__c)); } while(0)
+#endif /* _ONGC */
 
 #ifdef _HAS_REF_OBJ_LOCK
 static bool_t _lock_ref_object(_lock_t* lk, _ref_t* ref, void* obj);
@@ -6840,6 +6843,7 @@ static void _gc_collect_garbage(mb_interpreter_t* s, int depth) {
 	} while(1);
 
 	/* Tidy */
+	_ONGC(s, gc, gc->collected_table);
 	_ht_clear(gc->collected_table);
 	gc->valid_table = 0;
 	_ht_clear(valid);