* thread.c (rb_thread_select): preserve errno if no error

  occurred.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31412 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/thread.c b/thread.c
index dd40be0ece..c272256d4b 100644
--- a/thread.c
+++ b/thread.c
@@ -2672,7 +2672,7 @@ rb_thread_select(int max, fd_set * read, fd_set * write, fd_set * except,
 	return 0;
     }
     else {
-	int lerrno;
+	int lerrno = errno;
 	int result;
 
 	BLOCKING_REGION({