https://git.ruby-lang.org/ruby.git/commit/?id=a580dd7737

From a580dd77377c87754b437efb1a02cccc1554dafd Mon Sep 17 00:00:00 2001
From: John Hawthorn <john@h...>
Date: Thu, 16 Jun 2022 13:28:39 -0700
Subject: Don't check protected method ancestry on fcall

If we are making an FCALL, we know we are calling a method on self. This
is the same check made for private method visibility, so it should also
guarantee we can call a protected method.
---
 vm_insnhelper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index d2f3fc62bd..248a59f642 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -3749,7 +3749,7 @@ vm_call_method(rb_execution_context_t *ec, rb_control_frame_t *cfp, struct rb_ca https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L3749
             return vm_call_method_each_type(ec, cfp, calling);
 
 	  case METHOD_VISI_PROTECTED:
-	    if (!(vm_ci_flag(ci) & VM_CALL_OPT_SEND)) {
+	    if (!(vm_ci_flag(ci) & (VM_CALL_OPT_SEND | VM_CALL_FCALL))) {
                 VALUE defined_class = vm_defined_class_for_protected_call(vm_cc_cme(cc));
                 if (!rb_obj_is_kind_of(cfp->self, defined_class)) {
                     vm_cc_method_missing_reason_set(cc, MISSING_PROTECTED);
-- 
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