"wrong argument type nil (expected String)" from Dir.chdir

[Tim Kynerd]

I'm running Ruby 1.6.8.

Can anybody tell me why this line:

Dir.chdir("/")

results in the error "wrong argument type nil (expected String)" when
running in the debugger (ruby -r debug), but not when running in irb?

WTF?

--
Tim Kynerd Sundbyberg (småstan i storstan), Sweden [email]tkynerd@spamcop.net[/email]
Sunrise in Stockholm today: 8:00
Sunset in Stockholm today: 15:06
My rail transit photos at [url]http://www.kynerd.nu[/url]

[Yukihiro Matsumoto]

Hi,

In message ""wrong argument type nil (expected String)" from Dir.chdir"
on 03/11/24, Tim Kynerd <vxbrw58s02@sneakemail.com> writes:

|Can anybody tell me why this line:
|
|Dir.chdir("/")
|
|results in the error "wrong argument type nil (expected String)" when
|running in the debugger (ruby -r debug), but not when running in irb?

Can't reproduce. Could you give me more information? Your platform,
and exact version of ruby interpreter (shown by ruby -v).

matz.

[Tim Kynerd]

On Mon, 24 Nov 2003 09:20:03 +0900, Yukihiro Matsumoto wrote:

> Hi,
>
> In message ""wrong argument type nil (expected String)" from Dir.chdir"
> on 03/11/24, Tim Kynerd <vxbrw58s02@sneakemail.com> writes:
>
> |Can anybody tell me why this line:
> |
> |Dir.chdir("/")
> |
> |results in the error "wrong argument type nil (expected String)" when
> |running in the debugger (ruby -r debug), but not when running in irb?
>
> Can't reproduce. Could you give me more information? Your platform,
> and exact version of ruby interpreter (shown by ruby -v).
>
> matz.

Thanks Matz.

Sorry, should have posted a bit more information to start with. I'm
running under SuSE Linux 8.2, kernel 2.4 (can't find the full version
number). ruby -v reports:

ruby 1.6.8 (2002-12-24) [i686-linux]

After having problems with a similar statement as the first statement in a
program, I tried creating a new program with just the one line I posted
above. That shorter program also returns the "wrong argument type nil
(expected String)" error. However, typing the same line into irb works
fine and returns 0 (and after doing so, typing Dir.getwd into irb returns
the expected "/").

Grateful for any help you can provide.

--
Tim Kynerd Sundbyberg (småstan i storstan), Sweden [email]tkynerd@spamcop.net[/email]
Sunrise in Stockholm today: 8:03
Sunset in Stockholm today: 15:04
My rail transit photos at [url]http://www.kynerd.nu[/url]

[Tim Kynerd]

On Mon, 24 Nov 2003 07:24:18 +0100, Tim Kynerd wrote:

> On Mon, 24 Nov 2003 09:20:03 +0900, Yukihiro Matsumoto wrote:
>

>> Hi,
>>
>> In message ""wrong argument type nil (expected String)" from Dir.chdir"
>> on 03/11/24, Tim Kynerd <vxbrw58s02@sneakemail.com> writes:
>>
>> |Can anybody tell me why this line:
>> |
>> |Dir.chdir("/")
>> |
>> |results in the error "wrong argument type nil (expected String)" when
>> |running in the debugger (ruby -r debug), but not when running in irb?
>>
>> Can't reproduce. Could you give me more information? Your platform,
>> and exact version of ruby interpreter (shown by ruby -v).
>>
>> matz.

>
> Thanks Matz.
>
> Sorry, should have posted a bit more information to start with. I'm
> running under SuSE Linux 8.2, kernel 2.4 (can't find the full version
> number). ruby -v reports:
>
> ruby 1.6.8 (2002-12-24) [i686-linux]
>
> After having problems with a similar statement as the first statement in
> a program, I tried creating a new program with just the one line I
> posted above. That shorter program also returns the "wrong argument type
> nil (expected String)" error. However, typing the same line into irb
> works fine and returns 0 (and after doing so, typing Dir.getwd into irb
> returns the expected "/").
>
> Grateful for any help you can provide.

Sorry to be following up to myself, but here's a bit more info (that just
came to me in the shower ;-) ).

The following program:

newdir = "/"
Dir.chdir(newdir)

throws the same error in the debugger, but on the *first* line with the
string assignment. This gives me the strong feeling that something very
non-obvious is going on.

Also, a trip to /usr/src tells me I'm running kernel 2.4.20.

--
Tim Kynerd Sundbyberg (småstan i storstan), Sweden [email]tkynerd@spamcop.net[/email]
Sunrise in Stockholm today: 8:03
Sunset in Stockholm today: 15:04
My rail transit photos at [url]http://www.kynerd.nu[/url]

[Robert Klemme]

"Tim Kynerd" <vxbrw58s02@sneakemail.com> schrieb im Newsbeitrag
news:pan.2003.11.24.07.03.02.137518@kynerd.no-ip.com...

> Sorry to be following up to myself, but here's a bit more info (that

just

> came to me in the shower ;-) ).
>
> The following program:
>
> newdir = "/"
> Dir.chdir(newdir)
>
> throws the same error in the debugger, but on the *first* line with the
> string assignment. This gives me the strong feeling that something very
> non-obvious is going on.

Sounds strange indeed.

> Also, a trip to /usr/src tells me I'm running kernel 2.4.20.

Is that the same as "uname -a" reports?

robert