https://git.ruby-lang.org/ruby.git/commit/?id=fbb2d30ee6

From fbb2d30ee69c68ffad6287c12ca5a43753cd1b9a Mon Sep 17 00:00:00 2001
From: Benoit Daloze <eregontp@g...>
Date: Sun, 11 Oct 2020 13:51:34 +0200
Subject: Add specs that #caller and #caller_locations include core library
 methods defined in Ruby


diff --git a/spec/ruby/core/kernel/caller_locations_spec.rb b/spec/ruby/core/kernel/caller_locations_spec.rb
index c4e0084..8050b5b 100644
--- a/spec/ruby/core/kernel/caller_locations_spec.rb
+++ b/spec/ruby/core/kernel/caller_locations_spec.rb
@@ -65,4 +65,16 @@ describe 'Kernel#caller_locations' do https://github.com/ruby/ruby/blob/trunk/spec/ruby/core/kernel/caller_locations_spec.rb#L65
   it "must return the same locations when called with 1..-1 and when called with no arguments" do
     caller_locations.map(&:to_s).should == caller_locations(1..-1).map(&:to_s)
   end
+
+  guard -> { Kernel.instance_method(:tap).source_location } do
+    it "includes core library methods defined in Ruby" do
+      file, line = Kernel.instance_method(:tap).source_location
+      file.should.start_with?('<internal:')
+
+      loc = nil
+      tap { loc = caller_locations(1, 1)[0] }
+      loc.label.should == "tap"
+      loc.path.should.start_with? "<internal:"
+    end
+  end
 end
diff --git a/spec/ruby/core/kernel/caller_spec.rb b/spec/ruby/core/kernel/caller_spec.rb
index b710607..06e9ea6 100644
--- a/spec/ruby/core/kernel/caller_spec.rb
+++ b/spec/ruby/core/kernel/caller_spec.rb
@@ -51,4 +51,16 @@ describe 'Kernel#caller' do https://github.com/ruby/ruby/blob/trunk/spec/ruby/core/kernel/caller_spec.rb#L51
       locations2.map(&:to_s).should == locations1[2..-1].map(&:to_s)
     end
   end
+
+  guard -> { Kernel.instance_method(:tap).source_location } do
+    it "includes core library methods defined in Ruby" do
+      file, line = Kernel.instance_method(:tap).source_location
+      file.should.start_with?('<internal:')
+
+      loc = nil
+      tap { loc = caller(1, 1)[0] }
+      loc.should.end_with? "in `tap'"
+      loc.should.start_with? "<internal:"
+    end
+  end
 end
-- 
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