From 6c92d5b7814aa74f476a90f40c33bab4e3d44bd7 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Fri, 2 Oct 2026 00:47:44 +0900
Subject: [PATCH] Release ALLOCV buffer

Release `ALLOCV` buffers promptly when they are no longer needed.
---
 compile.c       | 1 +
 prism_compile.c | 3 +++
 string.c        | 5 +++--
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/compile.c b/compile.c
index d719764b150..36fa8de1f61 100644
--- a/compile.c
+++ b/compile.c
@@ -13732,6 +13732,7 @@ ibf_dump_outer_variables(struct ibf_dump *dump, const rb_iseq_t *iseq)
             ibf_dump_write_small_value(dump, ibf_dump_id(dump, id));
             ibf_dump_write_small_value(dump, val);
         }
+        ALLOCV_END(buff);
     }
 
     return offset;
diff --git a/prism_compile.c b/prism_compile.c
index b25e31bc51b..3a46485cdad 100644
--- a/prism_compile.c
+++ b/prism_compile.c
@@ -6941,6 +6941,9 @@ pm_compile_scope_node(rb_iseq_t *iseq, pm_scope_node_t *scope_node, const pm_nod
         keyword->table = (ID *)&ISEQ_BODY(iseq)->local_table[keyword_start_index];
     }
 
+    local_table_for_iseq = NULL;
+    if (idtmp) ALLOCV_END(idtmp);
+
     //********STEP 5************
     // Goal: compile anything that needed to be compiled
     if (optionals_list && optionals_list->size) {
diff --git a/string.c b/string.c
index 63ea40f78cb..741d5a62a4e 100644
--- a/string.c
+++ b/string.c
@@ -4093,8 +4093,6 @@ rb_str_append_as_bytes(int argc, VALUE *argv, VALUE str)
         break;
     }
 
-    RB_GC_GUARD(t0);
-
   clear_cr:
     // If no fast path was hit, we clear the coderange.
     // append_as_bytes is predominantly meant to be used in
@@ -4104,6 +4102,7 @@ rb_str_append_as_bytes(int argc, VALUE *argv, VALUE str)
     // situations.
     ENC_CODERANGE_CLEAR(str);
   keep_cr:
+    ALLOCV_END(t0);
     return str;
 }
 
@@ -9950,6 +9949,8 @@ tr_trans_pairs(VALUE str, VALUE pairs_val)
         }
     }
 
+    ALLOCV_END(pairs_handle);
+
     if (!modify) {
         return Qnil;
     }