https://git.ruby-lang.org/ruby.git/commit/?id=2b09e2fe7b

From 2b09e2fe7bc9ebcc6e6678317b789d8a35f587e6 Mon Sep 17 00:00:00 2001
From: Alan Wu <XrXr@u...>
Date: Tue, 30 Mar 2021 14:57:41 -0400
Subject: Add a comment

---
 yjit_codegen.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/yjit_codegen.c b/yjit_codegen.c
index fe6d1d593e..1a19c84101 100644
--- a/yjit_codegen.c
+++ b/yjit_codegen.c
@@ -1357,6 +1357,7 @@ jit_guard_known_klass(jitstate_t *jit, const ctx_t *recompile_context, VALUE kno https://github.com/ruby/ruby/blob/trunk/yjit_codegen.c#L1357
 }
 
 // Generate ancestry guard for protected callee.
+// Calls to protected callees only go through when self.is_a?(klass_that_defines_the_callee).
 static void
 jit_protected_callee_ancestry_guard(jitstate_t *jit, codeblock_t *cb, const rb_callable_method_entry_t *cme, uint8_t *side_exit)
 {
-- 
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