Update to ruby/spec@07164da

38 files changed, 733 insertions, 44 deletions

diff --git a/spec/ruby/.mspec.constants b/spec/ruby/.mspec.constants
index d7e09ca2d9..3e3bdbef8a 100644
--- a/spec/ruby/.mspec.constants
+++ b/spec/ruby/.mspec.constants
@@ -152,6 +152,7 @@ RegexpSpecsSubclassTwo
 Reline
 RescueInClassExample
 Resolv
+Ripper
 SHA1Constants
 SHA256Constants
 SHA384Constants
diff --git a/spec/ruby/.rubocop.yml b/spec/ruby/.rubocop.yml
index 5370d996b8..5db9256572 100644
--- a/spec/ruby/.rubocop.yml
+++ b/spec/ruby/.rubocop.yml
@@ -92,6 +92,7 @@ Lint/UnreachableCode:
   Exclude:
     - 'core/enumerator/lazy/fixtures/classes.rb'
     - 'core/kernel/catch_spec.rb'
+    - 'core/kernel/raise_spec.rb'
     - 'core/kernel/throw_spec.rb'
     - 'language/break_spec.rb'
     - 'language/fixtures/break.rb'
diff --git a/spec/ruby/.rubocop_todo.yml b/spec/ruby/.rubocop_todo.yml
index 8d9cd82f0b..7a5f9f74c5 100644
--- a/spec/ruby/.rubocop_todo.yml
+++ b/spec/ruby/.rubocop_todo.yml
@@ -59,6 +59,7 @@ Lint/InheritException:
     - 'core/enumerator/lazy/fixtures/classes.rb'
     - 'core/exception/fixtures/common.rb'
     - 'core/module/fixtures/autoload_ex1.rb'
+    - 'shared/kernel/raise.rb'
 
 # Offense count: 72
 # Cop supports --auto-correct.
@@ -115,6 +116,7 @@ Lint/RescueException:
     - 'core/exception/cause_spec.rb'
     - 'core/exception/no_method_error_spec.rb'
     - 'core/kernel/fixtures/autoload_frozen.rb'
+    - 'core/kernel/raise_spec.rb'
     - 'core/module/autoload_spec.rb'
     - 'core/mutex/sleep_spec.rb'
     - 'core/thread/abort_on_exception_spec.rb'
diff --git a/spec/ruby/CONTRIBUTING.md b/spec/ruby/CONTRIBUTING.md
index 8d18f1102d..9a2a341ae7 100644
--- a/spec/ruby/CONTRIBUTING.md
+++ b/spec/ruby/CONTRIBUTING.md
@@ -136,11 +136,11 @@ Here is a list of the most commonly-used guards:
 #### Version guards
 
 ```ruby
-ruby_version_is ""..."2.6 do
+ruby_version_is ""..."2.6" do
   # Specs for RUBY_VERSION < 2.6
 end
 
-ruby_version_is "2.6 do
+ruby_version_is "2.6" do
   # Specs for RUBY_VERSION >= 2.6
 end
 ```
diff --git a/spec/ruby/command_line/dash_r_spec.rb b/spec/ruby/command_line/dash_r_spec.rb
index b29895bd26..46c000b9e7 100644
--- a/spec/ruby/command_line/dash_r_spec.rb
+++ b/spec/ruby/command_line/dash_r_spec.rb
@@ -7,7 +7,22 @@ describe "The -r command line option" do
   end
 
   it "requires the specified file" do
-    result = ruby_exe(@script, options: "-r #{@test_file}")
-    result.should include(@test_file + ".rb")
+    out = ruby_exe(@script, options: "-r #{@test_file}")
+    out.should include("REQUIRED")
+    out.should include(@test_file + ".rb")
+  end
+
+  it "requires the file before parsing the main script" do
+    out = ruby_exe(fixture(__FILE__, "bad_syntax.rb"), options: "-r #{@test_file}", args: "2>&1")
+    $?.should_not.success?
+    out.should include("REQUIRED")
+    out.should include("syntax error")
+  end
+
+  it "does not require the file if the main script file does not exist" do
+    out = `#{ruby_exe.to_a.join(' ')} -r #{@test_file} #{fixture(__FILE__, "does_not_exist.rb")} 2>&1`
+    $?.should_not.success?
+    out.should_not.include?("REQUIRED")
+    out.should.include?("No such file or directory")
   end
 end
diff --git a/spec/ruby/command_line/fixtures/test_file.rb b/spec/ruby/command_line/fixtures/test_file.rb
index 961e3c0b0c..30a832299e 100644
--- a/spec/ruby/command_line/fixtures/test_file.rb
+++ b/spec/ruby/command_line/fixtures/test_file.rb
@@ -1 +1 @@
-"test file"
+puts "REQUIRED"
diff --git a/spec/ruby/core/array/fill_spec.rb b/spec/ruby/core/array/fill_spec.rb
index 96c8862208..6745bc8d09 100644
--- a/spec/ruby/core/array/fill_spec.rb
+++ b/spec/ruby/core/array/fill_spec.rb
@@ -207,8 +207,9 @@ describe "Array#fill with (filler, index, length)" do
 
   not_supported_on :opal do
     it "raises an ArgumentError or RangeError for too-large sizes" do
+      error_types = [RangeError, ArgumentError]
       arr = [1, 2, 3]
-      -> { arr.fill(10, 1, fixnum_max) }.should raise_error(ArgumentError)
+      -> { arr.fill(10, 1, fixnum_max) }.should raise_error { |err| error_types.should include(err.class) }
       -> { arr.fill(10, 1, bignum_value) }.should raise_error(RangeError)
     end
   end
diff --git a/spec/ruby/core/exception/backtrace_spec.rb b/spec/ruby/core/exception/backtrace_spec.rb
index 2d6825180a..3f74c4cefe 100644
--- a/spec/ruby/core/exception/backtrace_spec.rb
+++ b/spec/ruby/core/exception/backtrace_spec.rb
@@ -43,7 +43,7 @@ describe "Exception#backtrace" do
       # This regexp is deliberately imprecise to account for the need to abstract out
       # the paths of the included mspec files and the desire to avoid specifying in any
       # detail what the in `...' portion looks like.
-      line.should =~ /^[^ ]+\:\d+(:in `[^`]+')?$/
+      line.should =~ /^.+:\d+:in `[^`]+'$/
     end
   end
 
diff --git a/spec/ruby/core/kernel/__dir___spec.rb b/spec/ruby/core/kernel/__dir___spec.rb
index 64b439161f..0686b31e97 100644
--- a/spec/ruby/core/kernel/__dir___spec.rb
+++ b/spec/ruby/core/kernel/__dir___spec.rb
@@ -5,6 +5,13 @@ describe "Kernel#__dir__" do
     __dir__.should == File.realpath(File.dirname(__FILE__))
   end
 
+  it "returns the expanded path of the directory when used in the main script" do
+    fixtures_dir = File.dirname(fixture(__FILE__, '__dir__.rb'))
+    Dir.chdir(fixtures_dir) do
+      ruby_exe("__dir__.rb").should == "__dir__.rb\n#{fixtures_dir}\n"
+    end
+  end
+
   context "when used in eval with a given filename" do
     it "returns File.dirname(filename)" do
       eval("__dir__", nil, "foo.rb").should == "."
diff --git a/spec/ruby/core/kernel/at_exit_spec.rb b/spec/ruby/core/kernel/at_exit_spec.rb
index 21149f965b..7bdb5391fe 100644
--- a/spec/ruby/core/kernel/at_exit_spec.rb
+++ b/spec/ruby/core/kernel/at_exit_spec.rb
@@ -23,7 +23,7 @@ describe "Kernel.at_exit" do
   it "gives access to the last raised exception" do
     code = <<-EOC
       at_exit do
-        puts "The exception matches: \#{$! == $exception}"
+        puts "The exception matches: \#{$! == $exception} (message=\#{$!.message})"
       end
 
       begin
@@ -33,10 +33,35 @@ describe "Kernel.at_exit" do
       end
     EOC
 
-    result = ruby_exe(code, args: "2>&1", escape: true)
-    result.should =~ /The exception matches: true/
+    result = ruby_exe(code, args: "2>&1")
+    result.lines.should.include?("The exception matches: true (message=foo)\n")
   end
 
+  it "both exceptions in at_exit and in the main script are printed" do
+    result = ruby_exe('at_exit { raise "at_exit_error" }; raise "main_script_error"', args: "2>&1")
+    result.should.include?('at_exit_error (RuntimeError)')
+    result.should.include?('main_script_error (RuntimeError)')
+  end
+
+  it "decides the exit status if both at_exit and the main script raise SystemExit" do
+    ruby_exe('at_exit { exit 43 }; exit 42', args: "2>&1")
+    $?.exitstatus.should == 43
+  end
+
+  it "runs all at_exit even if some raise exceptions" do
+    code = 'at_exit { STDERR.puts "last" }; at_exit { exit 43 }; at_exit { STDERR.puts "first" }; exit 42'
+    result = ruby_exe(code, args: "2>&1")
+    result.should == "first\nlast\n"
+    $?.exitstatus.should == 43
+  end
+
+  it "runs at_exit handlers even if the main script fails to parse" do
+    script = fixture(__FILE__, "at_exit.rb")
+    result = ruby_exe('{', options: "-r#{script}", args: "2>&1")
+    $?.should_not.success?
+    result.should.include?("at_exit ran\n")
+    result.should.include?("syntax error")
+  end
 end
 
 describe "Kernel#at_exit" do
diff --git a/spec/ruby/core/kernel/fixtures/__dir__.rb b/spec/ruby/core/kernel/fixtures/__dir__.rb
new file mode 100644
index 0000000000..bf9a15e3c8
--- /dev/null
+++ b/spec/ruby/core/kernel/fixtures/__dir__.rb
@@ -0,0 +1,2 @@
+puts __FILE__
+puts __dir__
diff --git a/spec/ruby/core/kernel/fixtures/at_exit.rb b/spec/ruby/core/kernel/fixtures/at_exit.rb
new file mode 100644
index 0000000000..9c11a7ad6c
--- /dev/null
+++ b/spec/ruby/core/kernel/fixtures/at_exit.rb
@@ -0,0 +1,3 @@
+at_exit do
+  STDERR.puts "at_exit ran"
+end
diff --git a/spec/ruby/core/kernel/fixtures/warn_require.rb b/spec/ruby/core/kernel/fixtures/warn_require.rb
new file mode 100644
index 0000000000..c4b0733233
--- /dev/null
+++ b/spec/ruby/core/kernel/fixtures/warn_require.rb
@@ -0,0 +1 @@
+warn 'warn-require-warning', uplevel: 1
diff --git a/spec/ruby/core/kernel/fixtures/warn_require_caller.rb b/spec/ruby/core/kernel/fixtures/warn_require_caller.rb
new file mode 100644
index 0000000000..35a0f969f9
--- /dev/null
+++ b/spec/ruby/core/kernel/fixtures/warn_require_caller.rb
@@ -0,0 +1,2 @@
+# Use a different line than just 1
+require "#{__dir__}/warn_require"
diff --git a/spec/ruby/core/kernel/raise_spec.rb b/spec/ruby/core/kernel/raise_spec.rb
index bf26560246..591daa03cf 100644
--- a/spec/ruby/core/kernel/raise_spec.rb
+++ b/spec/ruby/core/kernel/raise_spec.rb
@@ -6,6 +6,27 @@ describe "Kernel#raise" do
   it "is a private method" do
     Kernel.should have_private_instance_method(:raise)
   end
+
+  it "re-raises the previously rescued exception if no exception is specified" do
+    ScratchPad.record nil
+
+    -> do
+      begin
+        raise Exception, "outer"
+        ScratchPad.record :no_abort
+      rescue Exception
+        begin
+          raise StandardError, "inner"
+        rescue StandardError
+        end
+
+        raise
+        ScratchPad.record :no_reraise
+      end
+    end.should raise_error(Exception, "outer")
+
+    ScratchPad.recorded.should be_nil
+  end
 end
 
 describe "Kernel#raise" do
diff --git a/spec/ruby/core/kernel/warn_spec.rb b/spec/ruby/core/kernel/warn_spec.rb
index 84cfa78672..79e78dd4a3 100644
--- a/spec/ruby/core/kernel/warn_spec.rb
+++ b/spec/ruby/core/kernel/warn_spec.rb
@@ -101,6 +101,19 @@ describe "Kernel#warn" do
       -> { w.f4("foo", 3) }.should output(nil, %r|core/kernel/fixtures/classes.rb:#{w.f3_call_lineno}: warning: foo|)
     end
 
+    # Test both explicitly without and with RubyGems as RubyGems overrides Kernel#warn
+    it "shows the caller of #require and not #require itself without RubyGems" do
+      file = fixture(__FILE__ , "warn_require_caller.rb")
+      ruby_exe(file, options: "--disable-gems", args: "2>&1").should == "#{file}:2: warning: warn-require-warning\n"
+    end
+
+    ruby_version_is "2.6" do
+      it "shows the caller of #require and not #require itself with RubyGems loaded" do
+        file = fixture(__FILE__ , "warn_require_caller.rb")
+        ruby_exe(file, options: "-rrubygems", args: "2>&1").should == "#{file}:2: warning: warn-require-warning\n"
+      end
+    end
+
     it "converts first arg using to_s" do
       w = KernelSpecs::WarnInNestedCall.new
 
diff --git a/spec/ruby/core/module/fixtures/refine.rb b/spec/ruby/core/module/fixtures/refine.rb
index 79e2e80197..e8215aa640 100644
--- a/spec/ruby/core/module/fixtures/refine.rb
+++ b/spec/ruby/core/module/fixtures/refine.rb
@@ -3,6 +3,10 @@ module ModuleSpecs
     def foo; "foo" end
   end
 
+  class ClassWithSuperFoo
+    def foo; [:C] end
+  end
+
   module PrependedModule
     def foo; "foo from prepended module"; end
   end
@@ -11,7 +15,11 @@ module ModuleSpecs
     def foo; "foo from included module"; end
   end
 
-  def self.build_refined_class
-    Class.new(ClassWithFoo)
+  def self.build_refined_class(for_super: false)
+    if for_super
+      Class.new(ClassWithSuperFoo)
+    else
+      Class.new(ClassWithFoo)
+    end
   end
 end
diff --git a/spec/ruby/core/module/refine_spec.rb b/spec/ruby/core/module/refine_spec.rb
index ca12d5d13b..ebb7111d82 100644
--- a/spec/ruby/core/module/refine_spec.rb
+++ b/spec/ruby/core/module/refine_spec.rb
@@ -731,16 +731,67 @@ describe "Module#refine" do
       result.should == "foo"
     end
 
+    it "looks in the refined class from included module" do
+      refined_class = ModuleSpecs.build_refined_class(for_super: true)
+
+      a = Module.new do
+        def foo
+          [:A] + super
+        end
+      end
+
+      refinement = Module.new do
+        refine refined_class do
+          include a
+        end
+      end
+
+      result = nil
+      Module.new do
+        using refinement
+
+        result = refined_class.new.foo
+      end
+
+      result.should == [:A, :C]
+    end
+
+    it "looks in the refined ancestors from included module" do
+      refined_class = ModuleSpecs.build_refined_class(for_super: true)
+      subclass = Class.new(refined_class)
+
+      a = Module.new do
+        def foo
+          [:A] + super
+        end
+      end
+
+      refinement = Module.new do
+        refine refined_class do
+          include a
+        end
+      end
+
+      result = nil
+      Module.new do
+        using refinement
+
+        result = subclass.new.foo
+      end
+
+      result.should == [:A, :C]
+    end
+
     # super in a method of a refinement invokes the method in the refined
     # class even if there is another refinement which has been activated
     # in the same context.
-    it "looks in the refined class even if there is another active refinement" do
-      refined_class = ModuleSpecs.build_refined_class
+    it "looks in the refined class first if called from refined method" do
+      refined_class = ModuleSpecs.build_refined_class(for_super: true)
 
       refinement = Module.new do
         refine refined_class do
           def foo
-            "foo from refinement"
+            [:R1]
           end
         end
       end
@@ -748,7 +799,7 @@ describe "Module#refine" do
       refinement_with_super = Module.new do
         refine refined_class do
           def foo
-            super
+            [:R2] + super
           end
         end
       end
@@ -760,7 +811,246 @@ describe "Module#refine" do
         result = refined_class.new.foo
       end
 
-      result.should == "foo"
+      result.should == [:R2, :C]
+    end
+
+    it "looks only in the refined class even if there is another active refinement" do
+      refined_class = ModuleSpecs.build_refined_class(for_super: true)
+
+      refinement = Module.new do
+        refine refined_class do
+          def bar
+            "you cannot see me from super because I belong to another active R"
+          end
+        end
+      end
+
+      refinement_with_super = Module.new do
+        refine refined_class do
+          def bar
+            super
+          end
+        end
+      end
+
+
+      Module.new do
+        using refinement
+        using refinement_with_super
+        -> {
+          refined_class.new.bar
+        }.should raise_error(NoMethodError)
+      end
+    end
+
+    it "does't have access to active refinements for C from included module" do
+      refined_class = ModuleSpecs.build_refined_class
+
+      a = Module.new do
+        def foo
+          super + bar
+        end
+      end
+
+      refinement = Module.new do
+        refine refined_class do
+          include a
+
+          def bar
+            "bar is not seen from A methods"
+          end
+        end
+      end
+
+      Module.new do
+        using refinement
+        -> {
+          refined_class.new.foo
+        }.should raise_error(NameError) { |e| e.name.should == :bar }
+      end
+    end
+
+    it "does't have access to other active refinements from included module" do
+      refined_class = ModuleSpecs.build_refined_class
+
+      refinement_integer = Module.new do
+        refine Integer do
+          def bar
+            "bar is not seen from A methods"
+          end
+        end
+      end
+
+      a = Module.new do
+        def foo
+          super + 1.bar
+        end
+      end
+
+      refinement = Module.new do
+        refine refined_class do
+          include a
+        end
+      end
+
+      Module.new do
+        using refinement
+        using refinement_integer
+        -> {
+          refined_class.new.foo
+        }.should raise_error(NameError) { |e| e.name.should == :bar }
+      end
+    end
+
+    # https://bugs.ruby-lang.org/issues/16977
+    it "looks in the another active refinement if super called from included modules" do
+      refined_class = ModuleSpecs.build_refined_class(for_super: true)
+
+      a = Module.new do
+        def foo
+          [:A] + super
+        end
+      end
+
+      b = Module.new do
+        def foo
+          [:B] + super
+        end
+      end
+
+      refinement_a = Module.new do
+        refine refined_class do
+          include a
+        end
+      end
+
+      refinement_b = Module.new do
+        refine refined_class do
+          include b
+        end
+      end
+
+      result = nil
+      Module.new do
+        using refinement_a
+        using refinement_b
+        result = refined_class.new.foo
+      end
+
+      result.should == [:B, :A, :C]
+    end
+
+    it "looks in the current active refinement from included modules" do
+      refined_class = ModuleSpecs.build_refined_class(for_super: true)
+
+      a = Module.new do
+        def foo
+          [:A] + super
+        end
+      end
+
+      b = Module.new do
+        def foo
+          [:B] + super
+        end
+      end
+
+      refinement = Module.new do
+        refine refined_class do
+          def foo
+            [:LAST] + super
+          end
+        end
+      end
+
+      refinement_a_b = Module.new do
+        refine refined_class do
+          include a
+          include b
+        end
+      end
+
+      result = nil
+      Module.new do
+        using refinement
+        using refinement_a_b
+        result = refined_class.new.foo
+      end
+
+      result.should == [:B, :A, :LAST, :C]
+    end
+
+    ruby_version_is ""..."2.8" do
+      it "looks in the lexical scope refinements before other active refinements" do
+        refined_class = ModuleSpecs.build_refined_class(for_super: true)
+
+        refinement_local = Module.new do
+          refine refined_class do
+            def foo
+              [:LOCAL] + super
+            end
+          end
+        end
+
+        a = Module.new do
+          using refinement_local
+
+          def foo
+            [:A] + super
+          end
+        end
+
+        refinement = Module.new do
+          refine refined_class do
+            include a
+          end
+        end
+
+        result = nil
+        Module.new do
+          using refinement
+          result = refined_class.new.foo
+        end
+
+        result.should == [:A, :LOCAL, :C]
+      end
+    end
+
+    ruby_version_is "2.8" do
+      # https://bugs.ruby-lang.org/issues/17007
+      it "does not look in the lexical scope refinements before other active refinements" do
+        refined_class = ModuleSpecs.build_refined_class(for_super: true)
+
+        refinement_local = Module.new do
+          refine refined_class do
+            def foo
+              [:LOCAL] + super
+            end
+          end
+        end
+
+        a = Module.new do
+          using refinement_local
+
+          def foo
+            [:A] + super
+          end
+        end
+
+        refinement = Module.new do
+          refine refined_class do
+            include a
+          end
+        end
+
+        result = nil
+        Module.new do
+          using refinement
+          result = refined_class.new.foo
+        end
+
+        result.should == [:A, :C]
+      end
     end
   end
 
diff --git a/spec/ruby/core/string/split_spec.rb b/spec/ruby/core/string/split_spec.rb
index 34a50a5f13..7ac8d7815c 100644
--- a/spec/ruby/core/string/split_spec.rb
+++ b/spec/ruby/core/string/split_spec.rb
@@ -426,12 +426,70 @@ describe "String#split with Regexp" do
   end
 
   ruby_version_is "2.6" do
-    it "yields each split substrings if a block is given" do
-      a = []
-      returned_object = "chunky bacon".split(" ") { |str| a << str.capitalize }
+    context "when a block is given" do
+      it "yields each split substring with default pattern" do
+        a = []
+        returned_object = "chunky bacon".split { |str| a << str.capitalize }
+
+        returned_object.should == "chunky bacon"
+        a.should == ["Chunky", "Bacon"]
+      end
+
+      it "yields the string when limit is 1" do
+        a = []
+        returned_object = "chunky bacon".split("", 1) { |str| a << str.capitalize }
+
+        returned_object.should == "chunky bacon"
+        a.should == ["Chunky bacon"]
+      end
+
+      it "yields each split letter" do
+        a = []
+        returned_object = "chunky".split("", 0) { |str| a << str.capitalize }
+
+        returned_object.should == "chunky"
+        a.should == %w(C H U N K Y)
+      end
+
+      it "yields each split substring with a pattern" do
+        a = []
+        returned_object = "chunky-bacon".split("-", 0) { |str| a << str.capitalize }
+
+        returned_object.should == "chunky-bacon"
+        a.should == ["Chunky", "Bacon"]
+      end
 
-      returned_object.should == "chunky bacon"
-      a.should == ["Chunky", "Bacon"]
+      it "yields each split substring with empty regexp pattern" do
+        a = []
+        returned_object = "chunky".split(//) { |str| a << str.capitalize }
+
+        returned_object.should == "chunky"
+        a.should == %w(C H U N K Y)
+      end
+
+      it "yields each split substring with empty regexp pattern and limit" do
+        a = []
+        returned_object = "chunky".split(//, 3) { |str| a << str.capitalize }
+
+        returned_object.should == "chunky"
+        a.should == %w(C H Unky)
+      end
+
+      it "yields each split substring with a regexp pattern" do
+        a = []
+        returned_object = "chunky:bacon".split(/:/) { |str| a << str.capitalize }
+
+        returned_object.should == "chunky:bacon"
+        a.should == ["Chunky", "Bacon"]
+      end
+
+      it "returns a string as is (and doesn't call block) if it is empty" do
+        a = []
+        returned_object = "".split { |str| a << str.capitalize }
+
+        returned_object.should == ""
+        a.should == []
+      end
     end
 
     describe "for a String subclass" do
diff --git a/spec/ruby/core/thread/backtrace/location/absolute_path_spec.rb b/spec/ruby/core/thread/backtrace/location/absolute_path_spec.rb
index 67f9274f32..90839baa0f 100644
--- a/spec/ruby/core/thread/backtrace/location/absolute_path_spec.rb
+++ b/spec/ruby/core/thread/backtrace/location/absolute_path_spec.rb
@@ -10,6 +10,13 @@ describe 'Thread::Backtrace::Location#absolute_path' do
     @frame.absolute_path.should == File.realpath(__FILE__)
   end
 
+  it 'returns an absolute path when using a relative main script path' do
+    script = fixture(__FILE__, 'absolute_path_main.rb')
+    Dir.chdir(File.dirname(script)) do
+      ruby_exe('absolute_path_main.rb').should == "absolute_path_main.rb\n#{script}\n"
+    end
+  end
+
   context "when used in eval with a given filename" do
     it "returns filename" do
       code = "caller_locations(0)[0].absolute_path"
diff --git a/spec/ruby/core/thread/backtrace/location/fixtures/absolute_path_main.rb b/spec/ruby/core/thread/backtrace/location/fixtures/absolute_path_main.rb
new file mode 100644
index 0000000000..d2b23393d4
--- /dev/null
+++ b/spec/ruby/core/thread/backtrace/location/fixtures/absolute_path_main.rb
@@ -0,0 +1,2 @@
+puts __FILE__
+puts caller_locations(0)[0].absolute_path
diff --git a/spec/ruby/core/thread/backtrace/location/lineno_spec.rb b/spec/ruby/core/thread/backtrace/location/lineno_spec.rb
index dc93d32d75..d14cf17514 100644
--- a/spec/ruby/core/thread/backtrace/location/lineno_spec.rb
+++ b/spec/ruby/core/thread/backtrace/location/lineno_spec.rb
@@ -10,4 +10,14 @@ describe 'Thread::Backtrace::Location#lineno' do
   it 'returns the absolute path of the call frame' do
     @frame.lineno.should == @line
   end
+
+  it 'should be the same line number as in #to_s, including for core methods' do
+    # Get the caller_locations from a call made into a core library method
+    locations = [:non_empty].map { caller_locations }[0]
+
+    locations.each do |location|
+      line_number = location.to_s[/:(\d+):/, 1]
+      location.lineno.should == Integer(line_number)
+    end
+  end
 end
diff --git a/spec/ruby/core/thread/backtrace/location/path_spec.rb b/spec/ruby/core/thread/backtrace/location/path_spec.rb
index 93eb4982d8..7863c055d3 100644
--- a/spec/ruby/core/thread/backtrace/location/path_spec.rb
+++ b/spec/ruby/core/thread/backtrace/location/path_spec.rb
@@ -87,6 +87,18 @@ describe 'Thread::Backtrace::Location#path' do
     end
   end
 
+  it 'should be the same path as in #to_s, including for core methods' do
+    # Get the caller_locations from a call made into a core library method
+    locations = [:non_empty].map { caller_locations }[0]
+
+    locations.each do |location|
+      filename = location.to_s[/^(.+):\d+:/, 1]
+      path = location.path
+
+      path.should == filename
+    end
+  end
+
   context "canonicalization" do
     platform_is_not :windows do
       before :each do
diff --git a/spec/ruby/core/thread/raise_spec.rb b/spec/ruby/core/thread/raise_spec.rb
index 88a96d5f4e..27de3cc627 100644
--- a/spec/ruby/core/thread/raise_spec.rb
+++ b/spec/ruby/core/thread/raise_spec.rb
@@ -203,6 +203,6 @@ describe "Thread#raise on same thread" do
         Thread.current.raise
       end
     end
-    -> { t.value }.should raise_error(RuntimeError)
+    -> { t.value }.should raise_error(RuntimeError, '')
   end
 end
diff --git a/spec/ruby/language/break_spec.rb b/spec/ruby/language/break_spec.rb
index 754d5d3c49..627cb4a071 100644
--- a/spec/ruby/language/break_spec.rb
+++ b/spec/ruby/language/break_spec.rb
@@ -362,4 +362,22 @@ describe "Executing break from within a block" do
     bt2.three
     ScratchPad.recorded.should == [:two_ensure, :three_post, :three_ensure]
   end
+
+  it "works when passing through a super call" do
+    cls1 = Class.new { def foo; yield; end }
+    cls2 = Class.new(cls1) { def foo; super { break 1 }; end }
+
+    -> do
+      cls2.new.foo.should == 1
+    end.should_not raise_error
+  end
+
+  it "raises LocalJumpError when converted into a proc during a a super call" do
+    cls1 = Class.new { def foo(&b); b; end }
+    cls2 = Class.new(cls1) { def foo; super { break 1 }.call; end }
+
+    -> do
+      cls2.new.foo
+    end.should raise_error(LocalJumpError)
+  end
 end
diff --git a/spec/ruby/language/numbered_parameters_spec.rb b/spec/ruby/language/numbered_parameters_spec.rb
index 5b0f74b3ab..9dd79f44b8 100644
--- a/spec/ruby/language/numbered_parameters_spec.rb
+++ b/spec/ruby/language/numbered_parameters_spec.rb
@@ -42,7 +42,7 @@ ruby_version_is "2.7" do
         end
       end
 
-      it "warns when numbered parameter is overriten with local variable" do
+      it "warns when numbered parameter is overwritten with local variable" do
         -> {
           eval("_1 = 0")
         }.should complain(/warning: `_1' is reserved for numbered parameter; consider another name/)
@@ -59,7 +59,7 @@ ruby_version_is "2.7" do
         }.should raise_error(SyntaxError, /_1 is reserved for numbered parameter/)
       end
 
-      it "errors when numbered parameter is overriten with local variable" do
+      it "errors when numbered parameter is overwritten with local variable" do
         -> {
           eval("_1 = 0")
         }.should raise_error(SyntaxError, /_1 is reserved for numbered parameter/)
diff --git a/spec/ruby/library/bigdecimal/to_s_spec.rb b/spec/ruby/library/bigdecimal/to_s_spec.rb
index 7f741ca8b6..f2851976e2 100644
--- a/spec/ruby/library/bigdecimal/to_s_spec.rb
+++ b/spec/ruby/library/bigdecimal/to_s_spec.rb
@@ -8,6 +8,11 @@ describe "BigDecimal#to_s" do
     @bigneg_str = "-3.1415926535897932384626433832795028841971693993"
     @bigdec = BigDecimal(@bigdec_str)
     @bigneg = BigDecimal(@bigneg_str)
+    @internal = Encoding.default_internal
+  end
+
+  after :each do
+    Encoding.default_internal = @internal
   end
 
   it "return type is of class String" do
@@ -78,4 +83,15 @@ describe "BigDecimal#to_s" do
     end
   end
 
+  ruby_version_is "2.8" do
+    it "returns a String in US-ASCII encoding when Encoding.default_internal is nil" do
+      Encoding.default_internal = nil
+      BigDecimal('1.23').to_s.encoding.should equal(Encoding::US_ASCII)
+    end
+
+    it "returns a String in US-ASCII encoding when Encoding.default_internal is not nil" do
+      Encoding.default_internal = Encoding::IBM437
+      BigDecimal('1.23').to_s.encoding.should equal(Encoding::US_ASCII)
+    end
+  end
 end
diff --git a/spec/ruby/library/digest/instance/new_spec.rb b/spec/ruby/library/digest/instance/new_spec.rb
new file mode 100644
index 0000000000..3f7939844b
--- /dev/null
+++ b/spec/ruby/library/digest/instance/new_spec.rb
@@ -0,0 +1,19 @@
+require_relative '../../../spec_helper'
+require 'digest'
+require_relative '../md5/shared/constants'
+
+describe "Digest::Instance#new" do
+  it "returns a copy of the digest instance" do
+    digest = Digest::MD5.new
+    copy = digest.new
+    copy.should_not.equal?(digest)
+  end
+
+  it "calls reset" do
+    digest = Digest::MD5.new
+    digest << "test"
+    digest.hexdigest.should != MD5Constants::BlankHexdigest
+    copy = digest.new
+    copy.hexdigest.should == MD5Constants::BlankHexdigest
+  end
+end
diff --git a/spec/ruby/library/ripper/lex_spec.rb b/spec/ruby/library/ripper/lex_spec.rb
new file mode 100644
index 0000000000..97cfb06904
--- /dev/null
+++ b/spec/ruby/library/ripper/lex_spec.rb
@@ -0,0 +1,23 @@
+require_relative '../../spec_helper'
+require 'ripper'
+
+describe "Ripper.lex" do
+  it "lexes a simple method declaration" do
+    expected = [
+        [[1, 0], :on_kw, "def", 'FNAME'],
+        [[1, 3], :on_sp, " ", 'FNAME'],
+        [[1, 4], :on_ident, "m", 'ENDFN'],
+        [[1, 5], :on_lparen, "(", 'BEG|LABEL'],
+        [[1, 6], :on_ident, "a", 'ARG'],
+        [[1, 7], :on_rparen, ")", 'ENDFN'],
+        [[1, 8], :on_sp, " ", 'BEG'],
+        [[1, 9], :on_kw, "nil", 'END'],
+        [[1, 12], :on_sp, " ", 'END'],
+        [[1, 13], :on_kw, "end", 'END']
+    ]
+    lexed = Ripper.lex("def m(a) nil end")
+    lexed.map { |e|
+      e[0...-1] + [e[-1].to_s.split('|').map { |s| s.sub(/^EXPR_/, '') }.join('|')]
+    }.should == expected
+  end
+end
diff --git a/spec/ruby/library/ripper/sexp_spec.rb b/spec/ruby/library/ripper/sexp_spec.rb
new file mode 100644
index 0000000000..6c69624c65
--- /dev/null
+++ b/spec/ruby/library/ripper/sexp_spec.rb
@@ -0,0 +1,13 @@
+require_relative '../../spec_helper'
+require 'ripper'
+
+describe "Ripper.sexp" do
+  it "returns an s-expression for a method declaration" do
+    expected = [:program,
+                [[:def,
+                  [:@ident, "hello", [1, 4]],
+                  [:params, nil, nil, nil, nil, nil, nil, nil],
+                  [:bodystmt, [[:@int, "42", [1, 11]]], nil, nil, nil]]]]
+    Ripper.sexp("def hello; 42; end").should == expected
+  end
+end
diff --git a/spec/ruby/optional/capi/encoding_spec.rb b/spec/ruby/optional/capi/encoding_spec.rb
index 8e59ee8b1b..93bde54069 100644
--- a/spec/ruby/optional/capi/encoding_spec.rb
+++ b/spec/ruby/optional/capi/encoding_spec.rb
@@ -58,6 +58,15 @@ describe "C-API Encoding function" do
     end
   end
 
+  describe "rb_enc_codelen" do
+    it "returns the correct length for the given codepoint" do
+      @s.rb_enc_codelen(0x24, Encoding::UTF_8).should == 1
+      @s.rb_enc_codelen(0xA2, Encoding::UTF_8).should == 2
+      @s.rb_enc_codelen(0x20AC, Encoding::UTF_8).should == 3
+      @s.rb_enc_codelen(0x24B62, Encoding::UTF_8).should == 4
+    end
+  end
+
   describe "rb_enc_find" do
     it "returns the encoding of an Encoding" do
       @s.rb_enc_find("UTF-8").should == "UTF-8"
@@ -130,6 +139,18 @@ describe "C-API Encoding function" do
     end
   end
 
+  describe "rb_enc_mbcput" do
+    it "writes the correct bytes to the buffer" do
+      @s.rb_enc_mbcput(0x24, Encoding::UTF_8).should == "$"
+      @s.rb_enc_mbcput(0xA2, Encoding::UTF_8).should == "¢"
+      @s.rb_enc_mbcput(0x20AC, Encoding::UTF_8).should == "€"
+      @s.rb_enc_mbcput(0x24B62, Encoding::UTF_8).should == "𤭢"
+
+      @s.rb_enc_mbcput(0x24, Encoding::UTF_16BE).bytes.should == [0, 0x24]
+      @s.rb_enc_mbcput(0x24B62, Encoding::UTF_16LE).bytes.should == [82, 216, 98, 223]
+    end
+  end
+
   describe "rb_usascii_encoding" do
     it "returns the encoding for Encoding::US_ASCII" do
       @s.rb_usascii_encoding.should == "US-ASCII"
@@ -610,4 +631,21 @@ describe "C-API Encoding function" do
       end
     end
   end
+
+  describe "ONIGENC_MBC_CASE_FOLD" do
+    it "returns the correct case fold for the given string" do
+      @s.ONIGENC_MBC_CASE_FOLD("lower").should == ["l", 1]
+      @s.ONIGENC_MBC_CASE_FOLD("Upper").should == ["u", 1]
+    end
+
+    it "works with other encodings" do
+      @s.ONIGENC_MBC_CASE_FOLD("lower".force_encoding("binary")).should == ["l", 1]
+      @s.ONIGENC_MBC_CASE_FOLD("Upper".force_encoding("binary")).should == ["u", 1]
+      @s.ONIGENC_MBC_CASE_FOLD("É").should == ["é", 2]
+
+      str, length = @s.ONIGENC_MBC_CASE_FOLD('$'.encode(Encoding::UTF_16BE))
+      length.should == 2
+      str.bytes.should == [0, 0x24]
+    end
+  end
 end
diff --git a/spec/ruby/optional/capi/ext/encoding_spec.c b/spec/ruby/optional/capi/ext/encoding_spec.c
index 8935db966e..cde4d0c351 100644
--- a/spec/ruby/optional/capi/ext/encoding_spec.c
+++ b/spec/ruby/optional/capi/ext/encoding_spec.c
@@ -127,6 +127,18 @@ static VALUE encoding_spec_rb_enc_mbc_to_codepoint(VALUE self, VALUE str, VALUE
   return INT2FIX(rb_enc_mbc_to_codepoint(p, e, rb_enc_get(str)));
 }
 
+static VALUE encoding_spec_rb_enc_mbcput(VALUE self, VALUE code, VALUE encoding) {
+  unsigned int c = FIX2UINT(code);
+  rb_encoding *enc = rb_to_encoding(encoding);
+  char buf[ONIGENC_CODE_TO_MBC_MAXLEN];
+  memset(buf, '\1', sizeof(buf));
+  int len = rb_enc_mbcput(c, buf, enc);
+  if (buf[len] != '\1') {
+    rb_raise(rb_eRuntimeError, "should not change bytes after len");
+  }
+  return rb_enc_str_new(buf, len, enc);
+}
+
 static VALUE encoding_spec_rb_enc_from_encoding(VALUE self, VALUE name) {
   return rb_enc_from_encoding(rb_enc_find(RSTRING_PTR(name)));
 }
@@ -266,6 +278,28 @@ static VALUE encoding_spec_rb_uv_to_utf8(VALUE self, VALUE buf, VALUE num) {
   return INT2NUM(rb_uv_to_utf8(RSTRING_PTR(buf), NUM2INT(num)));
 }
 
+static VALUE encoding_spec_ONIGENC_MBC_CASE_FOLD(VALUE self, VALUE str) {
+  char *beg = RSTRING_PTR(str);
+  char *beg_initial = beg;
+  char *end = beg + 2;
+  OnigUChar fold[ONIGENC_GET_CASE_FOLD_CODES_MAX_NUM];
+  memset(fold, '\1', sizeof(fold));
+  rb_encoding *enc = rb_enc_get(str);
+  int r = ONIGENC_MBC_CASE_FOLD(enc, ONIGENC_CASE_FOLD, &beg, (const OnigUChar *)end, fold);
+  if (r > 0 && fold[r] != '\1') {
+    rb_raise(rb_eRuntimeError, "should not change bytes after len");
+  }
+  VALUE str_result = r <= 0 ? Qnil : rb_enc_str_new((char *)fold, r, enc);
+  long bytes_used = beg - beg_initial;
+  return rb_ary_new3(2, str_result, INT2FIX(bytes_used));
+}
+
+static VALUE encoding_spec_rb_enc_codelen(VALUE self, VALUE code, VALUE encoding) {
+  unsigned int c = FIX2UINT(code);
+  rb_encoding *enc = rb_to_encoding(encoding);
+  return INT2FIX(rb_enc_codelen(c, enc));
+}
+
 void Init_encoding_spec(void) {
   VALUE cls;
   native_rb_encoding_pointer = (rb_encoding**) malloc(sizeof(rb_encoding*));
@@ -299,12 +333,14 @@ void Init_encoding_spec(void) {
   rb_define_method(cls, "rb_enc_associate_index", encoding_spec_rb_enc_associate_index, 2);
   rb_define_method(cls, "rb_enc_compatible", encoding_spec_rb_enc_compatible, 2);
   rb_define_method(cls, "rb_enc_copy", encoding_spec_rb_enc_copy, 2);
+  rb_define_method(cls, "rb_enc_codelen", encoding_spec_rb_enc_codelen, 2);
   rb_define_method(cls, "rb_enc_find", encoding_spec_rb_enc_find, 1);
   rb_define_method(cls, "rb_enc_find_index", encoding_spec_rb_enc_find_index, 1);
   rb_define_method(cls, "rb_enc_isalnum", encoding_spec_rb_enc_isalnum, 2);
   rb_define_method(cls, "rb_enc_isspace", encoding_spec_rb_enc_isspace, 2);
   rb_define_method(cls, "rb_enc_from_index", encoding_spec_rb_enc_from_index, 1);
   rb_define_method(cls, "rb_enc_mbc_to_codepoint", encoding_spec_rb_enc_mbc_to_codepoint, 2);
+  rb_define_method(cls, "rb_enc_mbcput", encoding_spec_rb_enc_mbcput, 2);
   rb_define_method(cls, "rb_enc_from_encoding", encoding_spec_rb_enc_from_encoding, 1);
   rb_define_method(cls, "rb_enc_get", encoding_spec_rb_enc_get, 1);
   rb_define_method(cls, "rb_enc_precise_mbclen", encoding_spec_rb_enc_precise_mbclen, 2);
@@ -326,6 +362,7 @@ void Init_encoding_spec(void) {
   rb_define_method(cls, "rb_enc_codepoint_len", encoding_spec_rb_enc_codepoint_len, 1);
   rb_define_method(cls, "rb_enc_str_asciionly_p", encoding_spec_rb_enc_str_asciionly_p, 1);
   rb_define_method(cls, "rb_uv_to_utf8", encoding_spec_rb_uv_to_utf8, 2);
+  rb_define_method(cls, "ONIGENC_MBC_CASE_FOLD", encoding_spec_ONIGENC_MBC_CASE_FOLD, 1);
 }
 
 #ifdef __cplusplus
diff --git a/spec/ruby/optional/capi/ext/typed_data_spec.c b/spec/ruby/optional/capi/ext/typed_data_spec.c
index 6eb91b76bf..70f21ce36f 100644
--- a/spec/ruby/optional/capi/ext/typed_data_spec.c
+++ b/spec/ruby/optional/capi/ext/typed_data_spec.c
@@ -148,6 +148,18 @@ VALUE sws_typed_change_struct(VALUE self, VALUE obj, VALUE new_val) {
   return Qnil;
 }
 
+VALUE sws_typed_rb_check_typeddata_same_type(VALUE self, VALUE obj) {
+  return rb_check_typeddata(obj, &sample_typed_wrapped_struct_data_type) == DATA_PTR(obj) ? Qtrue : Qfalse;
+}
+
+VALUE sws_typed_rb_check_typeddata_same_type_parent(VALUE self, VALUE obj) {
+  return rb_check_typeddata(obj, &sample_typed_wrapped_struct_parent_data_type) == DATA_PTR(obj) ? Qtrue : Qfalse;
+}
+
+VALUE sws_typed_rb_check_typeddata_different_type(VALUE self, VALUE obj) {
+  return rb_check_typeddata(obj, &sample_typed_wrapped_struct_other_data_type) == DATA_PTR(obj) ? Qtrue : Qfalse;
+}
+
 void Init_typed_data_spec(void) {
   VALUE cls = rb_define_class("CApiAllocTypedSpecs", rb_cObject);
   rb_define_alloc_func(cls, sdaf_alloc_typed_func);
@@ -160,6 +172,9 @@ void Init_typed_data_spec(void) {
   rb_define_method(cls, "typed_get_struct_rdata", sws_typed_get_struct_rdata, 1);
   rb_define_method(cls, "typed_get_struct_data_ptr", sws_typed_get_struct_data_ptr, 1);
   rb_define_method(cls, "typed_change_struct", sws_typed_change_struct, 2);
+  rb_define_method(cls, "rb_check_typeddata_same_type", sws_typed_rb_check_typeddata_same_type, 1);
+  rb_define_method(cls, "rb_check_typeddata_same_type_parent", sws_typed_rb_check_typeddata_same_type_parent, 1);
+  rb_define_method(cls, "rb_check_typeddata_different_type", sws_typed_rb_check_typeddata_different_type, 1);
 }
 
 #ifdef __cplusplus
diff --git a/spec/ruby/optional/capi/object_spec.rb b/spec/ruby/optional/capi/object_spec.rb
index bbcaec2ba8..484dfb851c 100644
--- a/spec/ruby/optional/capi/object_spec.rb
+++ b/spec/ruby/optional/capi/object_spec.rb
@@ -831,6 +831,7 @@ describe "CApiObject" do
 
       it "returns nil if the instance variable has not been initialized and is not a valid Ruby name" do
         @o.rb_ivar_get(@test, :bar).should == nil
+        @o.rb_ivar_get(@test, :mesg).should == nil
       end
 
       it 'returns the instance variable when it is not a valid Ruby name' do
@@ -866,6 +867,7 @@ describe "CApiObject" do
 
       it "does not throw an error if the instance variable is not a valid Ruby name" do
         @o.rb_ivar_defined(@test, :bar).should == false
+        @o.rb_ivar_defined(@test, :mesg).should == false
       end
     end
 
diff --git a/spec/ruby/optional/capi/spec_helper.rb b/spec/ruby/optional/capi/spec_helper.rb
index a7029a74ed..3b13e0854d 100644
--- a/spec/ruby/optional/capi/spec_helper.rb
+++ b/spec/ruby/optional/capi/spec_helper.rb
@@ -76,6 +76,7 @@ def compile_extension(name)
           $ruby = ENV.values_at('RUBY_EXE', 'RUBY_FLAGS').join(' ')
           # MRI magic to consider building non-bundled extensions
           $extout = nil
+          $warnflags << ' -Wno-declaration-after-statement'
           create_makefile(#{ext.inspect})
         RUBY
         output = ruby_exe("extconf.rb")
diff --git a/spec/ruby/optional/capi/typed_data_spec.rb b/spec/ruby/optional/capi/typed_data_spec.rb
index da56a050fd..9ccfa562d1 100644
--- a/spec/ruby/optional/capi/typed_data_spec.rb
+++ b/spec/ruby/optional/capi/typed_data_spec.rb
@@ -57,4 +57,21 @@ describe "CApiWrappedTypedStruct" do
       @s.typed_get_struct_data_ptr(a).should == 1024
     end
   end
+
+  describe "rb_check_typeddata" do
+    it "returns data pointer when the struct has the given type" do
+      a = @s.typed_wrap_struct(1024)
+      @s.rb_check_typeddata_same_type(a).should == true
+    end
+
+    it "returns data pointer when the parent struct has the given type" do
+      a = @s.typed_wrap_struct(1024)
+      @s.rb_check_typeddata_same_type_parent(a).should == true
+    end
+
+    it "raises an error for different types" do
+      a = @s.typed_wrap_struct(1024)
+      -> { @s.rb_check_typeddata_different_type(a) }.should raise_error(TypeError)
+    end
+  end
 end
diff --git a/spec/ruby/shared/kernel/raise.rb b/spec/ruby/shared/kernel/raise.rb
index d4553775f4..7d9954e29a 100644
--- a/spec/ruby/shared/kernel/raise.rb
+++ b/spec/ruby/shared/kernel/raise.rb
@@ -25,6 +25,14 @@ describe :kernel_raise, shared: true do
     -> { @object.raise("a bad thing") }.should raise_error(RuntimeError)
   end
 
+  it "passes no arguments to the constructor when given only an exception class" do
+    klass = Class.new(Exception) do
+      def initialize
+      end
+    end
+    -> { @object.raise(klass) }.should raise_error(klass) { |e| e.message.should == klass.to_s }
+  end
+
   it "raises a TypeError when passed a non-Exception object" do
     -> { @object.raise(Object.new) }.should raise_error(TypeError)
   end
@@ -41,25 +49,6 @@ describe :kernel_raise, shared: true do
     -> { @object.raise(nil) }.should raise_error(TypeError)
   end
 
-  it "re-raises the previously rescued exception if no exception is specified" do
-    -> do
-      begin
-        @object.raise Exception, "outer"
-        ScratchPad.record :no_abort
-      rescue
-        begin
-          @object.raise StandardError, "inner"
-        rescue
-        end
-
-        @object.raise
-        ScratchPad.record :no_reraise
-      end
-    end.should raise_error(Exception, "outer")
-
-    ScratchPad.recorded.should be_nil
-  end
-
   it "re-raises a previously rescued exception without overwriting the backtrace" do
     begin
       initial_raise_line = __LINE__; @object.raise 'raised'
diff --git a/spec/ruby/shared/process/exit.rb b/spec/ruby/shared/process/exit.rb
index 1820dd17fd..e633afc73a 100644
--- a/spec/ruby/shared/process/exit.rb
+++ b/spec/ruby/shared/process/exit.rb
@@ -91,4 +91,24 @@ describe :process_exit!, shared: true do
     out.should == ""
     $?.exitstatus.should == 21
   end
+
+  it "skips at_exit handlers" do
+    out = ruby_exe("at_exit { STDERR.puts 'at_exit' }; #{@object}.send(:exit!, 21)", args: '2>&1')
+    out.should == ""
+    $?.exitstatus.should == 21
+  end
+
+  it "overrides the original exception and exit status when called from #at_exit" do
+    code = <<-RUBY
+    at_exit do
+      STDERR.puts 'in at_exit'
+      STDERR.puts "$! is \#{$!.class}:\#{$!.message}"
+      #{@object}.send(:exit!, 21)
+    end
+    raise 'original error'
+    RUBY
+    out = ruby_exe(code, args: '2>&1')
+    out.should == "in at_exit\n$! is RuntimeError:original error\n"
+    $?.exitstatus.should == 21
+  end
 end