From df38160d820136d674856e2d5518011edd2798da Mon Sep 17 00:00:00 2001
From: dearblue <dearblue@gmx.com>
Date: Wed, 20 May 2026 21:15:54 +0900
Subject: [PATCH] Omit the check whether the typetag is `MRB_TT_FREE` after
 calling `obj_free()`

With commit cbc3dbedb4cd76f90e13ca3b2a32d213ce5b0d51, freed objects will always be `MRB_TT_FREE`.
---
 src/gc.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/src/gc.c b/src/gc.c
index 0654646c1..f8021c6b1 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -1230,14 +1230,10 @@ incremental_sweep_phase(mrb_state *mrb, mrb_gc *gc, size_t limit)
         if (is_dead(gc, &p->as.basic)) {
           if (p->as.basic.tt != MRB_TT_FREE) {
             obj_free(mrb, &p->as.basic, FALSE);
-            if (p->as.basic.tt == MRB_TT_FREE) {
-              p->as.free.next = page->freelist;
-              page->freelist = p;
-              freed++;
-            }
-            else {
-              dead_slot = FALSE;
-            }
+            mrb_assert(p->as.basic.tt == MRB_TT_FREE);
+            p->as.free.next = page->freelist;
+            page->freelist = p;
+            freed++;
           }
         }
         else {