# Computed hash is sometimes too large **URL:** \ **Category:** IronRuby\ **Created:** [March 1, 2011, 8:05pm UTC](https://www.ruby-forum.com/t/computed-hash-is-sometimes-too-large/203914 "2011-03-01T20:05:33Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\ **Post date:** [March 1, 2011, 8:05pm UTC](https://www.ruby-forum.com/t/computed-hash-is-sometimes-too-large/203914/1 "2011-03-01T20:05:33Z")
Took long enough, but it would appear the fix to #hash has finally made it into rubygems. Ryan R. Email: removed\_email\_address@domain.invalid LinkedIn: [http://www.linkedin.com/in/ryanriley](http://www.linkedin.com/in/ryanriley) Blog: [http://wizardsofsmart.net/](http://wizardsofsmart.net/) Website: [http://panesofglass.org/](http://panesofglass.org/) ---------- Forwarded message ---------- From: [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Date: Tue, Mar 1, 2011 at 10:54 AM Subject: [rubygems-Bugs-27154] Computed hash is sometimes too large. To: removed\_email\_address@domain.invalid Bugs item #27154, was opened at 2009-09-21 16:42 You can respond by visiting: [http://rubyforge.org/tracker/?func=detail&atid=575&aid=27154&group\_id=126](http://rubyforge.org/tracker/?func=detail&atid=575&aid=27154&group_id=126) Category: `gem install` command Group: v1.3.x Status: Closed Resolution: Accepted Priority: 3 Submitted By: Ryan R. (panesofglass) Assigned to: John B. (jbarnette) Summary: Computed hash is sometimes too large. Initial Comment: The current hash algorithm in dependency.rb (line 138) and specification.rb (line 658) can sometimes create a hash that is too large. This is also possible with Array#hash in MRI, which can also misbehave if one of the array elements returns a large hash value: class C def hash 100000000000000000000 end end [C.new].hash # =\> in `hash': bignum too big to convert into `long’ (RangeError) REXML has a similar issue. http://redmine.ruby- [lang.org/issues/show/1883](http://lang.org/issues/show/1883) tracks the issue, and MRI will be fixing the issue. Suggested fixes are: # edit: c:/ruby/libs/ruby/site\_ruby/1.8/rubygems/dependency.rb;C840659 File: dependency.rb — c:/ruby/libs/ruby/site\_ruby/1.8/rubygems/dependency.rb;C840659 (server) 6/23/2009 1:21 PM +++ c:/ruby/libs/ruby/site\_ruby/1.8/rubygems/dependency.rb @@ -112,7 +112,7 @@ end def hash # :nodoc: - name.hash + type.hash + version\_requirements.hash - name.hash ^ type.hash ^ version\_requirements.hash end # end # edit: c:/ruby/libs/ruby/site\_ruby/1.8/rubygems/specification.rb;C908357 File: specification.rb — c:/ruby/libs/ruby/site\_ruby/1.8/rubygems/specification.rb;C908357 (server) 6/23/2009 1:24 PM +++ c:/ruby/libs/ruby/site\_ruby/1.8/rubygems/specification.rb @@ -661,9 +661,8 @@ private :same\_attributes? ``` def hash # :nodoc: ``` - ``` @@attributes.inject(0) { |hash_code, (name, default_value)| ``` - ``` n = self.send(name).hash ``` - ``` hash_code + n ``` - ``` @@attributes.inject(612553) { |hash_code, (name, default_value)| ``` - ``` hash_code ^ self.send(name).hash } ``` end =================================================================== * * * Comment By: Bernard L. (blambeau) Date: 2011-03-01 19:54 Message: This bug seems to re-appear. requirement.rb should probably be patched as proposed by Daniel Weaver to guarantee compatibility with ruby 1.8.7-p176. I’ve written a review with additional details about this bug at: > **[The Sad/Amazing History of a Ruby\[Gems\] bug](http://revision-zero.org/history-of-a-bug)** > > Revision-Zero is a blog about computer science and relational databases * * * Comment By: Eric H. (drbrain) Date: 2011-02-02 01:03 Message: This is fixed. * * * Comment By: Daniel Weaver (zlern2k) Date: 2010-12-20 21:20 Message: I realize these are bugs in the underlying Ruby implementation of hash, but it really helps us to have them fixed in gem. This is the patch for requirement.rb that we currently need to deploy to make bundler happy with our apps: zlerntop:rubygems danielweaver$ diff -u requirement.rb.orig requirement.rb — requirement.rb.orig 2010-12-20 12:13:40.000000000 -0800 +++ requirement.rb 2010-12-20 12:13:40.000000000 -0800 @@ -106,7 +106,7 @@ end def hash # :nodoc: - requirements.hash - requirements.inject(0) { |h, r| h ^ r.first.hash ^ r.last.hash } end def marshal\_dump # :nodoc: * * * Comment By: George M. (gsmendoza) Date: 2010-12-07 05:06 Message: Hello again, I got the bignum error again, but this time with cucumber-0.9.4. These commands weren’t able to install the gem: - bundle install - bundle install --local - sudo bundle install --local - sudo bundle install --local --system - sudo bundle install --system However, I was able to work around the issue by 1. installing the gem to my system manually (sudo gem install cucumber –version “0.9.4”), and 2. installing the bundle to the system (sudo bundle install --system) For step 2, trying “bundle install --local” worked only if all the gems in the bundle are already installed. If there were some gems from the bundle that are not installed, running “sudo bundle install --system” was the only way I could install them. George M. Philippines * * * Comment By: George M. (gsmendoza) Date: 2010-12-01 04:52 Message: Hello, Appreciate if anybody can re-open this ticket. I am also getting the error when I try to install the dmitryv-backup gem via bundle. Please let me know if I need to provide any other information in order to fix this bug. Thanks! ## Gemfile: source :rubygems source “[http://gems.github.com](http://gems.github.com)” #… gem ‘dmitryv-backup’, ‘2.4.0’, :require =\> “backup” #… * * * ## Running: ## bundle install --local /usr/local/lib/site\_ruby/1.8/rubygems/requirement.rb:109:in `hash': bignum too big to convert into `long’ (RangeError) from /usr/local/lib/site\_ruby/1.8/rubygems/requirement.rb:109:in `hash' from /usr/local/lib/site_ruby/1.8/rubygems/specification.rb:675:in `hash’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/index.rb:36:in `inject' from /usr/local/lib/site_ruby/1.8/rubygems/specification.rb:674:in `each’ from /usr/local/lib/site\_ruby/1.8/rubygems/specification.rb:674:in `inject' from /usr/local/lib/site_ruby/1.8/rubygems/specification.rb:674:in `hash’ from /usr/lib/ruby/1.8/tsort.rb:204:in `include?' from /usr/lib/ruby/1.8/tsort.rb:204:in `each\_strongly\_connected\_component\_from’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec\_set.rb:130:in `tsort_each_child' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:130:in `each’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec\_set.rb:130:in `tsort_each_child' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:128:in `each’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec\_set.rb:128:in `tsort_each_child' from /usr/lib/ruby/1.8/tsort.rb:203:in `each\_strongly\_connected\_component\_from’ from /usr/lib/ruby/1.8/tsort.rb:209:in `each_strongly_connected_component_from' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:130:in `tsort\_each\_child’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec\_set.rb:130:in `each' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:130:in `tsort\_each\_child’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec\_set.rb:128:in `each' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:128:in `tsort\_each\_child’ from /usr/lib/ruby/1.8/tsort.rb:203:in `each_strongly_connected_component_from' from /usr/lib/ruby/1.8/tsort.rb:182:in `each\_strongly\_connected\_component’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec\_set.rb:124:in `tsort_each_node' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:124:in `each’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec\_set.rb:124:in `tsort_each_node' from /usr/lib/ruby/1.8/tsort.rb:180:in `each\_strongly\_connected\_component’ from /usr/lib/ruby/1.8/tsort.rb:148:in `tsort_each' from /usr/lib/ruby/1.8/tsort.rb:135:in `tsort’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec\_set.rb:107:in `sorted' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/spec_set.rb:12:in `each’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:44:in `run' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/installer.rb:8:in `install’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/cli.rb:225:in `install' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/task.rb:22:in `send’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/task.rb:22:in `run' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/invocation.rb:118:in `invoke\_task’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor.rb:246:in `dispatch' from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/lib/bundler/vendor/thor/base.rb:389:in `start’ from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.7/bin/bundle:13 from /usr/bin/bundle:19:in `load’ from /usr/bin/bundle:19 Thanks, George M. Philippines * * * Comment By: Ryan D. (zenspider) Date: 2010-11-12 23:46 Message: This ticket has been deemed stale and we’re closing it in order to catch up with our ticket list. If you think it is still valid, please reopen. * * * Comment By: Craig Cook (ccook) Date: 2010-10-18 23:08 Message: Hello, I tried this patch, but I am still getting the error, at the same place in the code. The error is the same with or without the patch to specification.rb; dependency.rb was already like the patched part shown above. This happened when installing using bundler, executed via capistrano. We had been using hpricot, it wasn’t needed, it was giving this error first. I took it out, but then the same RangeError happened with mysql. I’ve seen it before also with nokogiri. (Always with native gems, though). Here’s the relevant part of the log: ----------- begin log ---------------------------- \*\* [out :: 192.168.10.63] Installing mysql (2.8.1) \*\* [out :: 192.168.10.63] with native extensions \*\* [out :: 192.168.10.62] /usr/lib/ruby/site\_ruby/1.8/rubygems/requirement.rb:109:in `hash' **[out :: 192.168.10.62] :** [out :: 192.168.10.62] bignum too big to convert into `long’ \*\* [out :: 192.168.10.62] ( \*\* [out :: 192.168.10.62] RangeError \*\* [out :: 192.168.10.62] ) \*\* [out :: 192.168.10.62] from /usr/lib/ruby/site\_ruby/1.8/rubygems/requirement.rb:109:in `hash' ** [out :: 192.168.10.62] from /usr/lib/ruby/site_ruby/1.8/rubygems/specification.rb:675:in `hash’ \*\* [out :: 192.168.10.62] from /usr/lib/ruby/1.8/fileutils.rb:243:in `inject' ** [out :: 192.168.10.62] from /usr/lib/ruby/site_ruby/1.8/rubygems/specification.rb:674:in `each’ \*\* [out :: 192.168.10.62] from /usr/lib/ruby/site\_ruby/1.8/rubygems/specification.rb:674:in `inject' ** [out :: 192.168.10.62] from /usr/lib/ruby/site_ruby/1.8/rubygems/specification.rb:674:in `hash’ \*\* [out :: 192.168.10.62] from /usr/lib/ruby/1.8/tsort.rb:205:in `include?' ** [out :: 192.168.10.62] from /usr/lib/ruby/1.8/tsort.rb:205:in `each\_strongly\_connected\_component\_from’ \*\* [out :: 192.168.10.62] … 22 levels… \*\* [out :: 192.168.10.62] from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.2/lib/bundler/vendor/thor/base.rb:389:in `start' **[out :: 192.168.10.62] from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.2/bin/bundle:13** [out :: 192.168.10.62] from /usr/bin/bundle:19:in `load’ \*\* [out :: 192.168.10.62] from /usr/bin/bundle:19 ----------- end cap output ------------------- running: ------------ system & ruby info ------------------ [ccook@ev2-stage ~]$ ruby -v ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-linux] [ccook@ev2-stage ~]$ gem -v 1.3.7 [ccook@ev2-stage ~]$ uname -a Linux ev2-stage 2.6.18-194.11.4.el5xen #1 SMP Tue Sep 21 06:28:04 EDT 2010 i686 i686 i386 GNU/Linux ------ end system / ruby info ---------- Gemfile: ----------- begin Gemfile ----------------- source :gemcutter gem ‘rails’, ‘2.3.8’ gem ‘mysql’, ‘2.8.1’ gem “geokit” gem “geokit-rails” gem “builder” gem ‘chronic’ gem ‘whenever’ gem ‘database\_cleaner’ gem ‘apn\_on\_rails’ gem ‘factory\_girl’ gem ‘net-sftp’ gem ‘will\_paginate’ # dependency for squirrel & jqgrid gem ‘nokogiri’ # only for test/functional/auth\_controller\_test.rb gem ‘cucumber’ gem ‘cucumber-rails’ gem ‘webrat’ gem ‘rspec’ ---------- end Gemfile ----------------- So, is this the same issue? It sure looks like it to me. I hope not to have to dive into the innards of rubygems if possible. But we need to be able to deploy. The app is working and passing tests on development, but hard to say on staging as we can’t get it over there with cap. I suppose it could all be done by hand once anyway, but we (other dev on my team and I ) need to be able to do this over again. Thanks for your time in this! Cheers, Craig