Use write barriers when loading catch table

Found by wbcheck

Author: jhawthorn

compile.c

@@ -13142,7 +13142,7 @@ ibf_dump_catch_table(struct ibf_dump *dump, const rb_iseq_t *iseq)
 }
 
 static struct iseq_catch_table *
-ibf_load_catch_table(const struct ibf_load *load, ibf_offset_t catch_table_offset, unsigned int size)
+ibf_load_catch_table(const struct ibf_load *load, ibf_offset_t catch_table_offset, unsigned int size, const rb_iseq_t *parent_iseq)
 {
     if (size) {
         struct iseq_catch_table *table = ruby_xmalloc(iseq_catch_table_bytes(size));
@@ -13159,7 +13159,8 @@ ibf_load_catch_table(const struct ibf_load *load, ibf_offset_t catch_table_offse
             table->entries[i].cont = (unsigned int)ibf_load_small_value(load, &reading_pos);
             table->entries[i].sp = (unsigned int)ibf_load_small_value(load, &reading_pos);
 
-            table->entries[i].iseq = ibf_load_iseq(load, (const rb_iseq_t *)(VALUE)iseq_index);
+            rb_iseq_t *catch_iseq = (rb_iseq_t *)ibf_load_iseq(load, (const rb_iseq_t *)(VALUE)iseq_index);
+            RB_OBJ_WRITE(parent_iseq, &table->entries[i].iseq, catch_iseq);
         }
         return table;
     }
@@ -13664,7 +13665,7 @@ ibf_load_iseq_each(struct ibf_load *load, rb_iseq_t *iseq, ibf_offset_t offset)
     load_body->insns_info.body      = ibf_load_insns_info_body(load, insns_info_body_offset, insns_info_size);
     load_body->insns_info.positions = ibf_load_insns_info_positions(load, insns_info_positions_offset, insns_info_size);
     load_body->local_table          = ibf_load_local_table(load, local_table_offset, local_table_size);
-    load_body->catch_table          = ibf_load_catch_table(load, catch_table_offset, catch_table_size);
+    load_body->catch_table          = ibf_load_catch_table(load, catch_table_offset, catch_table_size, iseq);
     const rb_iseq_t *parent_iseq = ibf_load_iseq(load, (const rb_iseq_t *)(VALUE)parent_iseq_index);
     const rb_iseq_t *local_iseq = ibf_load_iseq(load, (const rb_iseq_t *)(VALUE)local_iseq_index);
     const rb_iseq_t *mandatory_only_iseq = ibf_load_iseq(load, (const rb_iseq_t *)(VALUE)mandatory_only_iseq_index);