eval.c: hide internal objects

* eval.c (rb_ensure): veil internal exception objects not to leak
  in ensure functions.  [ruby-core:79371] [Bug #13176]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57510 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 18 insertions, 0 deletions

diff --git a/test/-ext-/exception/test_exception_at_throwing.rb b/test/-ext-/exception/test_exception_at_throwing.rb
new file mode 100644
index 0000000000..aba26079eb
--- /dev/null
+++ b/test/-ext-/exception/test_exception_at_throwing.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+require 'test/unit'
+
+module Bug
+  class TestException < Test::Unit::TestCase
+    def test_exception_at_throwing
+      assert_separately(%w[-r-test-/exception], "#{<<-"begin;"}\n#{<<-"end;"}")
+      begin;
+        e = RuntimeError.new("[Bug #13176]")
+        assert_raise_with_message(e.class, e.message) do
+          catch do |t|
+            Bug::Exception.ensure_raise(nil, e) {throw t}
+          end
+        end
+      end;
+    end
+  end
+end