[fix #104] update open3 library with CRuby 1.9

MacRuby · Jun 20, 2012 · 2ad819e · 2ad819e
1 parent 2dbde57
commit 2ad819e
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/lib/open3.rb b/lib/open3.rb
@@ -203,11 +203,13 @@ def popen_run(cmd, opts, child_io, parent_io) # :nodoc:
     wait_thr = Process.detach(pid)
     child_io.each {|io| io.close }
     result = [*parent_io, wait_thr]
-    begin
-      return yield(*result)
-    ensure
-      parent_io.each{|io| io.close unless io.closed?}
-      wait_thr.join if wait_thr
+    if defined? yield
+      begin
+	return yield(*result)
+      ensure
+	parent_io.each{|io| io.close unless io.closed?}
+        wait_thr.join
+      end
     end
     result
   end