From: Tomas Matousek <redmine@...>
Date: 2010-05-14T11:11:51+09:00
Subject: [ruby-core:30233] [Bug #3290] File descriptors not closed when all IO objects are collected

Bug #3290: File descriptors not closed when all IO objects are collected
http://redmine.ruby-lang.org/issues/show/3290

Author: Tomas Matousek
Status: Open, Priority: Normal
ruby -v: ruby 1.9.1p129 (2009-05-12 revision 23412) [i386-mswin32]

The following script should raise an exception (invalid descriptor) on line [2] since the file object that allocated it should have been collected on line [1]. The script actually writes "hello" to the file so it seems that Ruby is leaking file descriptors. 

def foo
  f = File.open("a.txt", "w+")
  fd = f.to_i
  f = nil
  fd
end

fd = foo
10.times { GC.start }      # [1]

g = IO.new(fd, "w+")       # [2]
g.write('hello')
g.close

---

The behavior is same in 1.8.6.


----------------------------------------
http://redmine.ruby-lang.org