* thread.c (rb_wait_for_single_fd): Added POLLNVAL check.

  based on a patch from Eric Wong at [ruby-core:35991].



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31426 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/thread.c b/thread.c
index 6246243706..5e10a8366f 100644
--- a/thread.c
+++ b/thread.c
@@ -2737,7 +2737,10 @@ retry:
     }, ubf_select, GET_THREAD());
 
     if (result > 0) {
-	/* remain compatible with select(2)-based implementation */
+	if (fds.revents & POLLNVAL) {
+	    errno = EBADF;
+	    return -1;
+	}
 	result = (int)(fds.revents & fds.events);
 	return result == 0 ? events : result;
     }