gem_prelude.rb raises exception

Hi,

I cannot invoke ruby-thunk because of gem_prelude.rb.



$ ./ruby -v -e ''
ruby 1.9.0 (2007-11-26 patchlevel 0) [i686-linux]
gem_prelude.rb:134:in `block (2 levels) in
push_all_highest_version_gems_on_load_path': bad value for range
(ArgumentError)
        from gem_prelude.rb:131:in `each'
        from gem_prelude.rb:131:in `block in
push_all_highest_version_gems_on_load_path'
        from gem_prelude.rb:128:in `each'
        from gem_prelude.rb:128:in `push_all_highest_version_gems_on_load_path'
        from gem_prelude.rb:178:in `<compiled>'



In my environment, there is a directory named "1.8" in "$GEM_HOME/gem",
which seems to cause the exception.



$ echo $GEM_HOME
/opt/rubygems

$ ls $GEM_HOME/gems
1.8                 actionwebservice-1.2.3  rails-1.2.3    sqlite-2.0.1
...



I don't know whether it should be removed or not because I'm not
familiar with gem and I don't remember how to install gem ;)
I think that the core interpreter should work even in slightly
unusual environment.



Index: gem_prelude.rb
===================================================================
--- gem_prelude.rb      (revision 14024)
+++ gem_prelude.rb      (working copy)
@@ -131,6 +131,7 @@
           Dir.entries(gems_directory).each do |gem_directory_name|
             next if gem_directory_name == "." || gem_directory_name == ".."
             dash = gem_directory_name.rindex("-")
+            next unless dash
             gem_name = gem_directory_name[0...dash]
             current_version = GemVersions[gem_name]
             new_version =
calculate_integers_for_gem_version(gem_directory_name[dash+1..-1])

-- 
Yusuke ENDOH <[e-mail]>