YAML custom load: Segmentation faults

[Kaspar Schiess]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hello all,

using ruby 1.8.1 (2003-12-25) [i386-mingw32], I get segmentation faults
using YAML to deserialize a class of my own. The class is registered as
a domain type in YAML called !tua.ch,2004/ai/neural. (Yes it is a remake
of LibNeural).

Here's the deserialization code; I would like to know if I am doing
something conceptually wrong or if its just YAML who's crashing because
of a bug when not using objectmaker:

- --------------------------------------
YAML::add_domain_type(AI::NeuralNet::YAMLDOMAIN,
AI::NeuralNet::YAMLLOCATION) do |type, val|
~ net = AI::NeuralNet.new( *val['sizes'] )

~ o = val['output']
~ o.each_with_index do |w, i|
net.set_weights(AI::NeuralNet::LAYER_OUTPUT, i, w)
~ end

~ h = val['hidden']
~ h.each_with_index do |w, i|
~ net.set_weights(AI::NeuralNet::LAYER_HIDDEN, i, w)
~ end

~ net
end
- ---------------------------------------

Note that the YAML.load call returns an object of type AI::NeuralNet
with the correct dimensions and weights, but once I try to call into the
object, I get a

/lib/data/set.rb:158: [BUG] rb_gc_mark(): unknown data type
0x0(0x2a14698) non object
ruby 1.8.1 (2003-12-25) [i386-mingw32]

I guess the exact location of the bug is not important, because that is
just the point the garbage collection kicks in.

I am getting rather desperate, and I will have to abolish YAML later in
the day to finish my work here, but any suggestions on making YAML work
are welcome.


Best regards,
kaspar

semantics & semiotics
code manufacture

www.tua.ch/ruby
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (MingW32)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFA3AKKFifl4CA0ImQRAoL9AJ950AckTZbclIrkYmXn+rpW7D7mgQCgq4S2
5rUrc/tMmyNzD7/abT7L2kI=
=MJgv
-----END PGP SIGNATURE-----

 

[ts]

K> /lib/data/set.rb:158: [BUG] rb_gc_mark(): unknown data type
K> 0x0(0x2a14698) non object
K> ruby 1.8.1 (2003-12-25) [i386-mingw32]

K> I guess the exact location of the bug is not important, because that is
K> just the point the garbage collection kicks in.

No, it's important.

try to use a recent version of YAML and Syck from CVS


Guy Decoux

 

[Kaspar Schiess]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

ts wrote:

|
|
| K> /lib/data/set.rb:158: [BUG] rb_gc_mark(): unknown data type
| K> 0x0(0x2a14698) non object
| K> ruby 1.8.1 (2003-12-25) [i386-mingw32]
|
| K> I guess the exact location of the bug is not important, because that is
| K> just the point the garbage collection kicks in.
|
| No, it's important.
|
| try to use a recent version of YAML and Syck from CVS
|
|
| Guy Decoux

I did, but the problem stayed: Then I checked my code and the error was
there. So sorry for the detour and thank you for replying.

Nice side-effect is that I have the newest syck installed

Yours,
kaspar

semantics & semiotics
code manufacture

www.tua.ch/ruby
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (MingW32)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFA3CNCFifl4CA0ImQRAjxHAKCRsfmFBQWgzrKeQ1yI14XaGUrn1wCeI7ix
ldrP6C1MMokMH8pmQgti3nY=
=01qK
-----END PGP SIGNATURE-----