From: matz@... (Yukihiro Matsumoto)
Date: 2003-11-28T09:19:23+09:00
Subject: Re: "wrong argument type nil (expected String)" from Dir.chdir

Hi,

In message "Re: "wrong argument type nil (expected String)" from Dir.chdir"
    on 03/11/28, Tim Kynerd <vxbrw58s02@sneakemail.com> writes:

|Installed 1.8.0 with the following result:
|
|xxx@kynerd:~> cat chdir_test.rb
|Dir.chdir("/")
|nowdir = Dir.getwd
|puts nowdir
|xxx@kynerd:~> irb
|irb(main):001:0> Dir.chdir("/")
|=> 0
|irb(main):002:0> nowdir = Dir.getwd
|=> "/"
|irb(main):003:0> puts nowdir
|/
|=> nil
|irb(main):004:0> exit
|xxx@kynerd:~> ruby chdir_test.rb
|/
|xxx@kynerd:~> ruby -r debug chdir_test.rb
|Debug.rb
|Emacs support available.
|
|chdir_test.rb:1:Dir.chdir("/")
|(rdb:1)
|nil
|chdir_test.rb:1:cannot convert nil into String
|(rdb:1) q
|Really quit? (y/n) y
|xxx@kynerd:~> ruby -v
|ruby 1.8.0 (2003-08-04) [i686-linux]
|xxx@kynerd:~>
|
|I.e.: No luck. :-(

Finally, I get it.  It's a bug in debug.rb.  I fixed it. Thank you.

By the way, it's a lot easier for us to fix, if full step to reproduce
the error was disclosed like this at the first time, without guessing
the (wrong) cause by yourself, folks.

							matz.