https://git.ruby-lang.org/ruby.git/commit/?id=d79890cbfa

From d79890cbfaa32444e3bab60835d7f09abf3d9469 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@g...>
Date: Sun, 15 Mar 2020 02:25:46 -0700
Subject: Avoid doubly showing debug counters

when RubyVM.show_debug_counters is explicitly called.

According to the original description in 70fd099220446e39bb80eb0bb32870ce12134619,
I think it's not intended to use the exit counter at all, and I'd like
to skip it when I need to explicitly call this.

diff --git a/debug_counter.c b/debug_counter.c
index 11ec57a..af85811 100644
--- a/debug_counter.c
+++ b/debug_counter.c
@@ -92,7 +92,8 @@ rb_debug_counter_show_results(const char *msg) https://github.com/ruby/ruby/blob/trunk/debug_counter.c#L92
 VALUE
 rb_debug_counter_show(RB_UNUSED_VAR(VALUE klass))
 {
-    rb_debug_counter_show_results("method call");
+    rb_debug_counter_show_results("show_debug_counters");
+    ruby_debug_counter_show_at_exit(FALSE);
     return Qnil;
 }
 
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