From: Serguei Cambour <s.cambour@...>
Date: 2009-12-05T06:16:47+09:00
Subject: Re: gems installation - invalid gem format

Aaron Patterson wrote:
> On Sat, Dec 05, 2009 at 12:22:41AM +0900, Serguei Cambour wrote:
>> ruby 1.8.7 (2009-06-12 patchlevel 174) [i486-linux]
>> serge@serge-laptop:~$ gem -v
>> 1.3.5
>>  I always get the above error of '...invalid gem format..'. Any idea how
>> to resolve that? Something goes wrong in rubygems
>> commits/dependencies?Thank you.
> 
> Does this break with any other gem?  Or is it only the heroku gem?

With any other gem, even when I tried from installing Ruby, then doing 
(On Windows or Ubuntu - it was the same):

gem update --system
Updating RubyGems
Updating rubygems-update
ERROR:  While executing gem ... (Gem::InstallError)
    invalid gem format for 
C:/Ruby/lib/ruby/gems/1.8/cache/rubygems-update-1.3.5
.gem

Installing fromlocal rubygems-update-1.3.5 didn't solve the problem. 
Only the error message changed. Instead of

    invalid gem format for 
C:/Ruby/lib/ruby/gems/1.8/cache/rubygems-update-1.3.5

I got

    invalid gem format for C:/Ruby/lib/ruby/gems/1.8/cache/[gem_name]

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