Bug #2789: segfault in DL callbacks with mingw32
http://redmine.ruby-lang.org/issues/show/2789

Author: Ethan -
Status: Open, Priority: Normal
ruby -v: ruby 1.8.6 (2010-02-04 patchlevel 398) [i386-mingw32]

Attempting to use a callback with DL in mingw32 causes segmentation fault. 
(I apologize if I'm in the wrong place - I could not find any bug tracker or any sort of community for DL itself, and since it is included with ruby, I figured the tracker for ruby would be the appropriate place - I'd appreciate it if somebody could point me to where I should be, if that's incorrect.) 

The attached script works correctly in ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32]. 
It segfaults in any mingw32 build I try including:
ruby 1.8.6 (2010-02-04 patchlevel 398) [i386-mingw32] (this is the latest release candidate, RC2, from rubyinstaller.org)
ruby 1.8.7 (2010-01-10 patchlevel 249) [i386-mingw32] (this is the latest release candidate, RC2, from rubyinstaller.org)
ruby 1.8.6 (2009-08-04 patchlevel 383) [i386-mingw32] (this is the second-latest release candidate, RC1, from rubyinstaller.org)

Running the attached script, this is the output:

calling enumwindows ...
hwnd is 329524
dl_18_callback_mingw32.rb:10: [BUG] Segmentation fault
ruby 1.8.6 (2010-02-04) [i386-mingw32]

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.


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