Marshal bug?

Anders_Borch2 · 23 June 2003 10:35

Hi!

why is this happening to me:

$ irb
irb(main):001:0> a=File.new(‘somefile’,‘r’)
=> #<File:0xa052078>
irb(main):002:0> Marshal.dump(a.stat)
TypeError: can’t dump File::Stat
from (irb):2:in `dump’
from (irb):2
irb(main):003:0>

are File::Stat objects not marshallable? (is that a word?)

···

–
dc -e
4ddod3dddn1-89danrn10-dan3+ann6dan2an13dn1+dn2-dn3+5ddan2/9+an13nap

Dave_Mail_Archive · 23 June 2003 13:06

Anders Borch wrote:

Hi!

why is this happening to me:

$ irb
irb(main):001:0> a=File.new(‘somefile’,‘r’)
^^ read-only file

···

=> #<File:0xa052078>
irb(main):002:0> Marshal.dump(a.stat)
TypeError: can’t dump File::Stat
from (irb):2:in `dump’
from (irb):2
irb(main):003:0>

are File::Stat objects not marshallable? (is that a word?)

Michael_Campbell1 · 23 June 2003 13:10

Maybe I misread, but I think he was asking why a.stat instance
couldn’t be marshalled, not why you couldn’t marshal to the file
referenced by ‘a’, no?

Changing ‘r’ to ‘w’ above anyway yields (for me):

bash-2.05b$ cat tmp.rb
a=File.new(‘somefile’,‘w’)
Marshal.dump(a.stat)

bash-2.05b$ ruby -v
ruby 1.8.0 (2003-05-26) [i386-mswin32]

bash-2.05b$ ruby tmp.rb
tmp.rb:2:in dump': class File::Stat needs to have instance method _dump_data’ (TypeError)
from tmp.rb:2

···

— Dave Thomas dave@pragprog.com wrote:

Anders Borch wrote:

Hi!

why is this happening to me:

$ irb
irb(main):001:0> a=File.new(‘somefile’,‘r’)
^^ read-only file
=> #<File:0xa052078>
irb(main):002:0> Marshal.dump(a.stat)
TypeError: can’t dump File::Stat
from (irb):2:in `dump’
from (irb):2
irb(main):003:0>

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ts1 · 23 June 2003 13:11

Anders Borch wrote:

irb(main):001:0> a=File.new('somefile','r')

^^ read-only file

???

svg% ruby -e 'Marshal.dump(File.new("aa", "w").stat)'
-e:1:in `dump': class File::Stat needs to have instance method `_dump_data' (TypeError)
from -e:1
svg%

Guy Decoux

Dave_Mail_Archive · 23 June 2003 13:16

Michael Campbell wrote:

irb(main):001:0> a=File.new(‘somefile’,‘r’)
                                      ^^  read-only file
irb(main):002:0> Marshal.dump(a.stat)
TypeError: can’t dump File::Stat
from (irb):2:in `dump’
from (irb):2
irb(main):003:0>
Maybe I misread, but I think he was asking why a.stat instance
couldn’t be marshalled, not why you couldn’t marshal to the file
referenced by ‘a’, no?

Sorry - posted too soon. You’re right.

Dave

David_D_Andrea1 · 23 June 2003 14:12

Hello everyone;

I’m just starting out, reading the pickaxe, this forum, and trying to
get a handle on OOP/design patterns. I’m hoping to use Ruby for
database applications, as I’ve been going crazy with unstructured code
in FileMaker (!!!).

I’ve just installed dbi (this on OS X):

[Chiclet:~/Desktop] davidd% tar -xzvf ruby-dbi-all-0.0.20.tar.gz
[Chiclet:~/Desktop] davidd% cd ruby-dbi-all
[Chiclet:~/Desktop/ruby-dbi-all] davidd% ruby setup.rb config
–with=dbi,dbd_mysql
(setup fails if I don’t specify --with, I suppose because of missing
modules???)
[Chiclet:~/Desktop/ruby-dbi-all] davidd% ruby setup.rb setup
[Chiclet:~/Desktop/ruby-dbi-all] davidd% sudo ruby setup.rb install
(used sudo because otherwise got permission errors)

but the test script from Paul DuBois’ tutorial
(http://www.kitebird.com/articles/ruby-dbi.html) doesn’t execute
correctly:

[Chiclet:~/Rubydev/dbi] davidd% ruby simple.rb
/sw/lib/ruby/site_ruby/1.6/dbi/dbi.rb:502:in load_driver': Could not load driver (undefined methodDriver’ for nil) (DBI::InterfaceError)
from /sw/lib/ruby/site_ruby/1.6/dbi/dbi.rb:392:in
_get_full_driver' from /sw/lib/ruby/site_ruby/1.6/dbi/dbi.rb:372:inconnect’
from simple.rb:7

MySQL itself (Ver 3.23.52-entropy.ch) seems to be fine, I’ve created
appropriate user…

Any clues for the clueless would be greatly appreciated!

David

Anders_Borch2 · 23 June 2003 15:17

Michael Campbell wrote:

Anders Borch wrote:

Hi!

why is this happening to me:

$ irb
irb(main):001:0> a=File.new(‘somefile’,‘r’)
                                      ^^  read-only file
=> #<File:0xa052078>
irb(main):002:0> Marshal.dump(a.stat)
TypeError: can’t dump File::Stat
from (irb):2:in `dump’
from (irb):2
irb(main):003:0>
Maybe I misread, but I think he was asking why a.stat instance
couldn’t be marshalled, not why you couldn’t marshal to the file
referenced by ‘a’, no?

Changing ‘r’ to ‘w’ above anyway yields (for me):

bash-2.05b$ cat tmp.rb
a=File.new(‘somefile’,‘w’)
Marshal.dump(a.stat)

bash-2.05b$ ruby -v
ruby 1.8.0 (2003-05-26) [i386-mswin32]

bash-2.05b$ ruby tmp.rb
tmp.rb:2:in dump': class File::Stat needs to have instance method _dump_data’ (TypeError)
from tmp.rb:2

I have a hard time believing that you cannot dump stats for a readonly
file. Anyway im dumping to stdout not a file, just to make sure that
there are no misunderstandings there.

btw. I have this behavior both with and without irb and both on
ruby 1.6.7 (2002-03-01) [i686-linux]
and
ruby 1.6.8 (2002-12-24) [i686-cygwin]

any ideas? (i’d rather not update to 1.8 - at least not before 1.8 comes
out of it’s “pre” state…)

···

— Dave Thomas dave@pragprog.com wrote:

–
dc -e
4ddod3dddn1-89danrn10-dan3+ann6dan2an13dn1+dn2-dn3+5ddan2/9+an13nap

Brian_Candler · 23 June 2003 18:55

I’m just starting out, reading the pickaxe, this forum, and trying to
get a handle on OOP/design patterns. I’m hoping to use Ruby for
database applications, as I’ve been going crazy with unstructured code
in FileMaker (!!!).

I’ve just installed dbi (this on OS X):
…
but the test script from Paul DuBois’ tutorial
(http://www.kitebird.com/articles/ruby-dbi.html) doesn’t execute
correctly:

[Chiclet:~/Rubydev/dbi] davidd% ruby simple.rb
/sw/lib/ruby/site_ruby/1.6/dbi/dbi.rb:502:in load_driver': Could not load driver (undefined method Driver’ for nil) (DBI::InterfaceError)

You need to install the ruby-mysql package, as well as the ruby-dbi
package. (ruby-dbi is just a wrapper around ruby-dbi, which is in turn a
Ruby wrapper around the native C API)

Regards,

Brian.

···

On Mon, Jun 23, 2003 at 11:12:01PM +0900, David D’Andrea wrote:

Michael_Campbell1 · 23 June 2003 19:02

(ruby-dbi is just a wrapper around ruby-dbi, which is in
turn …

Did you mean ruby-dbi is a wrapper around ruby-mysql here?

···

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David_D_Andrea1 · 24 June 2003 08:39

Appreciate the pointer, pretty ug primitive mistake there.

However I still can’t get this to work. I think the mysql DBD isn’t
getting installed properly.

[~/Desktop/mysql-ruby-2.4.4a]% ruby extconf.rb
–with-mysql-include=/usr/local/mysql/include
–with-mysql-lib=/usr/local/mysql/lib
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lm… yes
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lz… yes
checking for mysql_query() in -lmysqlclient… yes
checking for mysql.h… yes
creating Makefile
% make
gcc -fno-common -g -O2 -fno-common -pipe -no-cpp-precomp -I.
-I/sw/lib/ruby/1.6/powerpc-darwin6.6 -I. -I/sw/include -DHAVE_MYSQL_H
-I/sw/include -I/usr/local/mysql/include -c -o mysql.o mysql.c
mysql.c: In function Init_mysql': mysql.c:1420: ER_SUBSELECT_NO_’ undeclared (first use in this function)
mysql.c:1420: (Each undeclared identifier is reported only once
mysql.c:1420: for each function it appears in.)
make: *** [mysql.o] Error 1
% ruby -I. ./test.rb localhost root lovelypass
./test.rb:11:in `require’: No such file to load – ./mysql (LoadError)
from ./test.rb:11
‘%make install’ here fails too, and running simple.rb still returns the
same error (undefined method, DBI::InterfaceError)

hrmm…?

I believe I have the include & lib parameters to extconf.rb correctly
set… Running extconf.rb with no args, or as suggested in DuBois’
tutorial also fail (they don’t find the mysql_query())
I’m not sure what to try at this point, I’ve taken a few stabs:
It doesn’t make a difference if I reinstall the DBI after this DBD
install.
I’ve also tried stopping mysqld before installing the DBD, and
installing under bash, no difference.
I’ve even tried editing extconf.rb’s Makefile to fill in an empty
LIBPATH param…

any ideas? I hope I’m not missing something obvious again…

David

···

On Monday, June 23, 2003, at 02:55 PM, Brian Candler wrote:

You need to install the ruby-mysql package, as well as the ruby-dbi
package. (ruby-dbi is just a wrapper around ruby-dbi, which is in turn
a
Ruby wrapper around the native C API)

Brian_Candler · 24 June 2003 07:36

I did. Thank you

···

On Tue, Jun 24, 2003 at 04:02:42AM +0900, Michael Campbell wrote:

(ruby-dbi is just a wrapper around ruby-dbi, which is in
turn …

Did you mean ruby-dbi is a wrapper around ruby-mysql here?

Paul_DuBois · 24 June 2003 16:04

Appreciate the pointer, pretty ug primitive mistake there.

However I still can’t get this to work. I think the mysql DBD isn’t
getting installed properly.

[~/Desktop/mysql-ruby-2.4.4a]% ruby extconf.rb
–with-mysql-include=/usr/local/mysql/include
–with-mysql-lib=/usr/local/mysql/lib
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lm… yes
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lz… yes
checking for mysql_query() in -lmysqlclient… yes
checking for mysql.h… yes
creating Makefile
% make
gcc -fno-common -g -O2 -fno-common -pipe -no-cpp-precomp -I.
-I/sw/lib/ruby/1.6/powerpc-darwin6.6 -I. -I/sw/include
-DHAVE_MYSQL_H -I/sw/include -I/usr/local/mysql/include -c -o
mysql.o mysql.c
mysql.c: In function Init_mysql': mysql.c:1420: ER_SUBSELECT_NO_’ undeclared (first use in this function)
mysql.c:1420: (Each undeclared identifier is reported only once
mysql.c:1420: for each function it appears in.)
make: *** [mysql.o] Error 1
% ruby -I. ./test.rb localhost root lovelypass
./test.rb:11:in `require’: No such file to load – ./mysql (LoadError)
from ./test.rb:11
‘%make install’ here fails too, and running simple.rb still returns
the same error (undefined method, DBI::InterfaceError)

Hmm, that’s weird. Looks like the configuration process (which configures
mysql.c) doesn’t look for digits in the error constant names. Try this
patch and let us know what happens:

— extconf.rb.orig Sat Feb 22 20:20:50 2003
+++ extconf.rb Tue Jun 24 11:02:53 2003
@@ -44,7 +44,7 @@
next unless l =~ /errmsg.h|mysqld_error.h/
fn = l.split(/"/)[1]
IO::foreach(fn) do |m|

if m =~ /^#define\s+([CE]R_[A-Z_]+)/ then

if m =~ /^#define\s+([CE]R_[A-Z0-9_]+)/ then
error_syms << $1
end
end

If that works for you (it does for me), I’ll send the patch to Tomita.

···

At 17:39 +0900 6/24/03, David D’Andrea wrote:

hrmm…?

I believe I have the include & lib parameters to extconf.rb
correctly set… Running extconf.rb with no args, or as suggested
in DuBois’ tutorial also fail (they don’t find the mysql_query())
I’m not sure what to try at this point, I’ve taken a few stabs:
It doesn’t make a difference if I reinstall the DBI after this DBD install.
I’ve also tried stopping mysqld before installing the DBD, and
installing under bash, no difference.
I’ve even tried editing extconf.rb’s Makefile to fill in an empty
LIBPATH param…

any ideas? I hope I’m not missing something obvious again…

David

On Monday, June 23, 2003, at 02:55 PM, Brian Candler wrote:

You need to install the ruby-mysql package, as well as the ruby-dbi
package. (ruby-dbi is just a wrapper around ruby-dbi, which is in turn a
Ruby wrapper around the native C API)

David_D_Andrea1 · 24 June 2003 17:22

Thank you for the patch. It seems to help, make now gets further but
fails on the link…
(What file is it looking for? Maybe I need to set some PATH variable??)
(extconf.rb and test.rb before & after make produce the same output as
above)

% make
gcc -fno-common -g -O2 -fno-common -pipe -no-cpp-precomp -I.
-I/sw/lib/ruby/1.6/powerpc-darwin6.6 -I. -I/sw/include -DHAVE_MYSQL_H
-I/sw/include -I/usr/local/mysql/include -c -o mysql.o mysql.c
cc -dynamic -bundle -undefined suppress -flat_namespace
-L/usr/local/mysql/lib -L/sw/lib -o mysql.bundle mysql.o -L. -lruby
-lmysqlclient -lz -lm
ld: can’t locate file for: -lruby
make: *** [mysql.bundle] Error 1

David

···

On Tuesday, June 24, 2003, at 12:04 PM, Paul DuBois wrote:

At 17:39 +0900 6/24/03, David D’Andrea wrote:

Appreciate the pointer, pretty ug primitive mistake there.

However I still can’t get this to work. I think the mysql DBD isn’t
getting installed properly.

[~/Desktop/mysql-ruby-2.4.4a]% ruby extconf.rb
–with-mysql-include=/usr/local/mysql/include
–with-mysql-lib=/usr/local/mysql/lib
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lm… yes
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lz… yes
checking for mysql_query() in -lmysqlclient… yes
checking for mysql.h… yes
creating Makefile
% make
gcc -fno-common -g -O2 -fno-common -pipe -no-cpp-precomp -I.
-I/sw/lib/ruby/1.6/powerpc-darwin6.6 -I. -I/sw/include -DHAVE_MYSQL_H
-I/sw/include -I/usr/local/mysql/include -c -o mysql.o mysql.c
mysql.c: In function Init_mysql': mysql.c:1420: ER_SUBSELECT_NO_’ undeclared (first use in this
function)
mysql.c:1420: (Each undeclared identifier is reported only once
mysql.c:1420: for each function it appears in.)
make: *** [mysql.o] Error 1
% ruby -I. ./test.rb localhost root lovelypass
./test.rb:11:in `require’: No such file to load – ./mysql (LoadError)
from ./test.rb:11
‘%make install’ here fails too, and running simple.rb still returns
the same error (undefined method, DBI::InterfaceError)

Hmm, that’s weird. Looks like the configuration process (which
configures
mysql.c) doesn’t look for digits in the error constant names. Try this
patch and let us know what happens:

— extconf.rb.orig Sat Feb 22 20:20:50 2003
+++ extconf.rb Tue Jun 24 11:02:53 2003
@@ -44,7 +44,7 @@
next unless l =~ /errmsg.h|mysqld_error.h/
fn = l.split(/"/)[1]
IO::foreach(fn) do |m|

if m =~ /^#define\s+([CE]R_[A-Z_]+)/ then

if m =~ /^#define\s+([CE]R_[A-Z0-9_]+)/ then
error_syms << $1
end
end

If that works for you (it does for me), I’ll send the patch to Tomita.

Paul_DuBois · 24 June 2003 22:41

Can’t help you there. I use the Ruby that comes with Mac OS X, not
one installed under /sw. Is that a Fink-installed version?

Here’s what I see on my machine:

% make
gcc -fno-common -g -Os -pipe -no-cpp-precomp -pipe -pipe
-no-precomp -I. -I/usr/lib/ruby/1.6/powerpc-darwin6.0 -I.
-I/usr/include -DHAVE_MYSQL_H -I’/usr/local/mysql/include/mysql’ -c
-o mysql.o mysql.c
gcc: unrecognized option `-no-precomp’
cc1: warning: changing search order for system directory “/usr/include”
cc1: warning: as it has already been specified as a non-system directory
cc -dynamic -bundle -undefined suppress -flat_namespace
-L/usr/lib/ruby/1.6/powerpc-darwin6.0 -L/usr/lib -o mysql.bundle
mysql.o -L’/usr/local/mysql/lib/mysql’ -lmysqlclient -lz -lm
-L/usr/local/ssl/lib -lssl -lcrypto

Mine’s not even looking for -lruby.

···

At 2:22 +0900 6/25/03, David D’Andrea wrote:

On Tuesday, June 24, 2003, at 12:04 PM, Paul DuBois wrote:

At 17:39 +0900 6/24/03, David D’Andrea wrote:

Appreciate the pointer, pretty ug primitive mistake there.

However I still can’t get this to work. I think the mysql DBD
isn’t getting installed properly.

[~/Desktop/mysql-ruby-2.4.4a]% ruby extconf.rb
–with-mysql-include=/usr/local/mysql/include
–with-mysql-lib=/usr/local/mysql/lib
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lm… yes
checking for mysql_query() in -lmysqlclient… no
checking for main() in -lz… yes
checking for mysql_query() in -lmysqlclient… yes
checking for mysql.h… yes
creating Makefile
% make
gcc -fno-common -g -O2 -fno-common -pipe -no-cpp-precomp -I.
-I/sw/lib/ruby/1.6/powerpc-darwin6.6 -I. -I/sw/include
-DHAVE_MYSQL_H -I/sw/include -I/usr/local/mysql/include -c -o
mysql.o mysql.c
mysql.c: In function Init_mysql': mysql.c:1420: ER_SUBSELECT_NO_’ undeclared (first use in this function)
mysql.c:1420: (Each undeclared identifier is reported only once
mysql.c:1420: for each function it appears in.)
make: *** [mysql.o] Error 1
% ruby -I. ./test.rb localhost root lovelypass
./test.rb:11:in `require’: No such file to load – ./mysql (LoadError)
from ./test.rb:11
‘%make install’ here fails too, and running simple.rb still
returns the same error (undefined method, DBI::InterfaceError)

Hmm, that’s weird. Looks like the configuration process (which configures
mysql.c) doesn’t look for digits in the error constant names. Try this
patch and let us know what happens:

— extconf.rb.orig Sat Feb 22 20:20:50 2003
+++ extconf.rb Tue Jun 24 11:02:53 2003
@@ -44,7 +44,7 @@
next unless l =~ /errmsg.h|mysqld_error.h/
fn = l.split(/"/)[1]
IO::foreach(fn) do |m|

if m =~ /^#define\s+([CE]R_[A-Z_]+)/ then

if m =~ /^#define\s+([CE]R_[A-Z0-9_]+)/ then
error_syms << $1
end
end

If that works for you (it does for me), I’ll send the patch to Tomita.

Thank you for the patch. It seems to help, make now gets further
but fails on the link…
(What file is it looking for? Maybe I need to set some PATH variable??)
(extconf.rb and test.rb before & after make produce the same output as above)

% make
gcc -fno-common -g -O2 -fno-common -pipe -no-cpp-precomp -I.
-I/sw/lib/ruby/1.6/powerpc-darwin6.6 -I. -I/sw/include
-DHAVE_MYSQL_H -I/sw/include -I/usr/local/mysql/include -c -o
mysql.o mysql.c
cc -dynamic -bundle -undefined suppress -flat_namespace
-L/usr/local/mysql/lib -L/sw/lib -o mysql.bundle mysql.o -L. -lruby
-lmysqlclient -lz -lm
ld: can’t locate file for: -lruby
make: *** [mysql.bundle] Error 1

David

David_D_Andrea · 25 June 2003 19:28

However I still can’t get this to work. I think the mysql DBD isn’t
getting installed properly.

Can’t help you there. I use the Ruby that comes with Mac OS X, not
one installed under /sw. Is that a Fink-installed version?

Indeed it is. I installed it under the (apparently mistaken) belief
that it would make other packages easier to install.

Ok, time to back up, reinstall everything. See you guys in a week &
thanks for all the pointers.

Dave

···

On Tuesday, June 24, 2003, at 06:41 PM, Paul DuBois wrote:

At 17:39 +0900 6/24/03, David D’Andrea wrote:

Topic		Replies	Views
Bug? ruby -e 's=File.stat("/");Marshal.dump(s);' ruby-talk	0	104	4 December 2003
Bug? ruby -e 's=File.stat("/");Marshal.dump(s);' ruby-talk	3	101	6 December 2003
How can I marshall File::Stat, and do file tests? ruby-talk	0	107	2 November 2003
Marshalling and serialiing to IO problem ruby-talk	1	114	5 June 2008
How can I marshall File::Stat, and do file tests? ruby-talk	0	106	2 November 2003

Marshal bug?

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