timeout.rb: use UncaughtThrowError

* lib/timeout.rb (Timeout::ExitException#exception): rescue
  UncaughtThrowError which is specific for throw, instead of
  ArgumentError.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48460 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 2 deletions

diff --git a/lib/timeout.rb b/lib/timeout.rb
index d805dce2a3..cf23fb5fb6 100644
--- a/lib/timeout.rb
+++ b/lib/timeout.rb
@@ -40,8 +40,7 @@ module Timeout
         bt = caller
         begin
           throw(self, bt)
-        rescue ArgumentError => e
-          raise unless e.message.start_with?("uncaught throw")
+        rescue UncaughtThrowError
           raise Error, message, backtrace
         end
       end