# \[Bug #1477\] DL::Function#unbind raises TypeError

**URL:** <https://www.ruby-forum.com/t/bug-1477-dl-function-unbind-raises-typeerror/168122>\
**Category:** Development\
**Created:** [May 16, 2009, 10:35am UTC](https://www.ruby-forum.com/t/bug-1477-dl-function-unbind-raises-typeerror/168122 "2009-05-16T10:35:48Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Takashi\_T](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/4af34b/32.png) [@Takashi\_T](https://www.ruby-forum.com/u/Takashi_T)\
**Post date:** [May 16, 2009, 10:35am UTC](https://www.ruby-forum.com/t/bug-1477-dl-function-unbind-raises-typeerror/168122/1 "2009-05-16T10:35:48Z")

</div>

Bug #1477: DL::Function#unbind raises TypeError  
[http://redmine.ruby-lang.org/issues/show/1477](http://redmine.ruby-lang.org/issues/show/1477)

e$B5/I\<\<Te(B: Takashi T.  
e$B%9%F!\<%?%9e(B: Open, e$BM%@hEYe(B: Normal  
e$B%+%F%4%je(B: ext, Target version: 1.9.2  
ruby -v: ruby 1.9.2dev (2009-05-16 trunk 23440) [i686-linux]

e$B%3!\<%k%P%C%/$G$O$J$$C1$J$ke(B DL::Function e$B$KBP$7$Fe(B unbind  
e$B$r8F$V$He(B  
e$B$h$/$o$+$i$J$$%(%i!\<$,=P$^$9!#e(B

$ cat d11.rb

require ‘dl/import’

h = DL::Handle.new  
addr = h.sym(‘strlen’)  
cfunc = DL::CFunc.new(addr, DL::TYPE\_INT)  
func = DL::Function.new(cfunc, [DL::TYPE\_VOIDP])  
func.unbind

$ ruby-1.9 -v d11.rb  
ruby 1.9.2dev (2009-05-16 trunk 23440) [i686-linux]  
/usr/local/pkg/ruby-1.9/lib/ruby/1.9.1/dl/callback.rb:51:in `[]': no implicit conversion from nil to integer (TypeError) from /usr/local/pkg/ruby-1.9/lib/ruby/1.9.1/dl/callback.rb:51:in `remove\_callback\_internal’  
from  
/usr/local/pkg/ruby-1.9/lib/ruby/1.9.1/dl/callback.rb:60:in  
`remove_cdecl_callback' from /usr/local/pkg/ruby-1.9/lib/ruby/1.9.1/dl/func.rb:88:in `unbind’  
from d11.rb:8:in `’

---

<div class="post-metadata">

**Author:** ![Takashi\_T](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/4af34b/32.png) [@Takashi\_T](https://www.ruby-forum.com/u/Takashi_T)\
**Post date:** [May 16, 2009, 11:08am UTC](https://www.ruby-forum.com/t/bug-1477-dl-function-unbind-raises-typeerror/168122/2 "2009-05-16T11:08:40Z")

</div>

e$B%A%1%C%He(B #1477 e$B$,99?7$5$l$^$7$?!#e(B (by Nobuyoshi N.)

e$B%9%F!\<%?%9e(B Opene$B$+$ie(BClosede$B$KJQ99e(B  
e$B?JD=e(B % 0e$B$+$ie(B100e$B$KJQ99e(B

## Applied in changeset r23444.

[http://redmine.ruby-lang.org/issues/show/1477](http://redmine.ruby-lang.org/issues/show/1477)