https://git.ruby-lang.org/ruby.git/commit/?id=d9bfbe363d

From d9bfbe363d14f8258d239eb702729926571b88e7 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <tenderlove@r...>
Date: Mon, 26 Aug 2019 11:14:03 -0700
Subject: Make `gc_update_table_refs` match `mark_tbl_no_pin` a little more
 closely

This commit just makes `gc_update_table_refs` match `mark_tbl_no_pin`
more closely.

diff --git a/gc.c b/gc.c
index 0d7732a..f7b770b 100644
--- a/gc.c
+++ b/gc.c
@@ -7770,9 +7770,11 @@ hash_foreach_replace(st_data_t key, st_data_t value, st_data_t argp, int error) https://github.com/ruby/ruby/blob/trunk/gc.c#L7770
 }
 
 static void
-gc_update_table_refs(rb_objspace_t * objspace, st_table *ht)
+gc_update_table_refs(rb_objspace_t * objspace, st_table *tbl)
 {
-    if (st_foreach_with_replace(ht, hash_foreach_replace, hash_replace_ref, (st_data_t)objspace)) {
+    if (!tbl || tbl->num_entries == 0) return;
+
+    if (st_foreach_with_replace(tbl, hash_foreach_replace, hash_replace_ref, (st_data_t)objspace)) {
         rb_raise(rb_eRuntimeError, "hash modified during iteration");
     }
 }
-- 
cgit v0.10.2


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