* lib/monitor.rb (mon_try_enter, mon_enter): should reset @mon_count

  just in case the previous owner thread dies without mon_exit.
  [fix GH-874] Patch by @chrisberkhout

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50525 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/monitor.rb b/lib/monitor.rb
index 07394b5900..e0491ec054 100644
--- a/lib/monitor.rb
+++ b/lib/monitor.rb
@@ -170,6 +170,7 @@ module MonitorMixin
         return false
       end
       @mon_owner = Thread.current
+      @mon_count = 0
     end
     @mon_count += 1
     return true
@@ -184,6 +185,7 @@ module MonitorMixin
     if @mon_owner != Thread.current
       @mon_mutex.lock
       @mon_owner = Thread.current
+      @mon_count = 0
     end
     @mon_count += 1
   end