two segfaults in ruby inotify extension library

Binary package hint: libinotify-ruby

Segfault #1 - Poor input type checking in rb_inotify_add_watch() throws a segfault when passed e.g. the nil object
Segfault #2 - Closing the inotify file descriptor in a separate thread may lead to fd reuse and segfault in rb_inotify_each_event

Supplied patch provides tests to trigger these bugs and
a) adds a type check in rb_inotify_add_watch()
b) sets the file descriptor to -1 in rb_inotify_close()
c) exits rb_inotify_each_event() when the file descriptor is invalidated

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: libinotify-ruby 0.0.2-4
ProcVersionSignature: Ubuntu 2.6.35-27.48-generic 2.6.35.11
Uname: Linux 2.6.35-27-generic x86_64
Architecture: amd64
Date: Wed Mar 16 15:59:26 2011
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: libinotify-ruby