# Class(es) become NIL .. how?

**URL:** <https://www.ruby-forum.com/t/class-es-become-nil-how/173689>\
**Category:** Ruby\
**Created:** [August 13, 2009, 11:37am UTC](https://www.ruby-forum.com/t/class-es-become-nil-how/173689 "2009-08-13T11:37:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![KollSSSSr\_LSSSSszl](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/e495f1/32.png) [@KollSSSSr\_LSSSSszl](https://www.ruby-forum.com/u/KollSSSSr_LSSSSszl)\
**Post date:** [August 13, 2009, 11:37am UTC](https://www.ruby-forum.com/t/class-es-become-nil-how/173689/1 "2009-08-13T11:37:15Z")

</div>

Hi,

I’ve written a mail gateway in ruby. It is in the log-run (stress)test  
phase. I’ve encounter the following weird phenomen: The daemon suddenly  
forgot one of its class that is rather the class became to NIL. Soon  
after the daemon silently exit and died. I cannot settle whether is it  
my program’s fault or Ruby’s fault or The Sequel’s fault (Because the  
class that became to NIL is a Sequel::Model class).

How can debug or trace a problem like this? How can define the source of  
the problem (program, ruby,sequel)?

Any advice are welcome

Thank you

Laszlo