eval_error.c: fix loop on exception in message

* error.c (rb_get_message): accessor to the message.

* eval_error.c (rb_ec_error_print): handle exceptions on fetching
  the message.  [Bug #14566]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63133 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 0 deletions

diff --git a/test/ruby/test_exception.rb b/test/ruby/test_exception.rb
index 61521cbfff..43115de3bd 100644
--- a/test/ruby/test_exception.rb
+++ b/test/ruby/test_exception.rb
@@ -1309,4 +1309,15 @@ $stderr = $stdout; raise "\x82\xa0"') do |outs, errs, status|
       assert_operator(message, :end_with?, top)
     end
   end
+
+  def test_exception_in_message
+    code = "#{<<~"begin;"}\n#{<<~'end;'}"
+    begin;
+      class Bug14566 < StandardError
+        def message; raise self.class; end
+      end
+      raise Bug14566
+    end;
+    assert_in_out_err([], code, [], /Bug14566/, success: false, timeout: 1)
+  end
 end