Fix: "undefined method `bytesize' for #<Array>"

I believe that when WEBrick has trouble bringing up your Rails application, the WEBrick component that is supposed to print you a pretty error message has a bug and sometimes fails with this message:

"undefined method `bytesize' for #<Array>"

Starting the application in Passenger gave me a stacktrace in log/development.log that pointed to the actual problem.

Possible causes discovered by looking at the logs

A Rails plugin would require the sqlite3 gem, but that gem wasn't in the Gem bundle.
Rack only parses 65536 form params by default
Problem can occur when using the integrated Ruby Mine Debugger: Try to restart the server without debugging mode

Henning Koch

makandra.de

Say thanks1

Last edit

2017-03-29

Emanuel

License

Source code in this card is licensed under the MIT License.

Fix Rubygems binary error: undefined method `activate_bin_path' for Gem:Module (NoMethodError)

So you're getting an error like this:

undefined method `activate_bin_path' for Gem:Module (NoMethodError)

Here is what happened:

You installed a recent version of Rubygems
You installed some gems that install a binary (like `bun...

Fixing "undefined local variable or method `version_requirements' for #<Rails::GemDependency:0x...> (NameError)"

Phillip Koebbe from Ruby on Rails suggested inserting following code between the "bootstrap" and "initialize" sections of enviroment.rb. This hack fixes the problem.

if Gem::VERSION >= "1.3.6"
  module Rails
    class GemDependency

...

How to fix "undefined method `name' for Array" error when running bundled commands on Ruby 1.8.7 + Rails 2.3

On recent/fresh installations of Ruby 1.8.7 you may encounter this error why calling any bundled binary (or just bundle exec):

/home/arne/.rvm/gems/ruby-1.8.7-p374@global/gems/rubygems-bundler-1.4.2/lib/rubygems-bundler/noexec.rb:75:in ...

How to fix: undefined method `specifications' (caused by RubyGems 1.8)

Sometimes, when running a rake task, RubyGems 1.8.5 raises an error:

rake aborted!
undefined method `specifications' for "/usr/lib/ruby/gems/1.8":String

This has been fixed since May 31 but is still not available as a new RubyGems versio...

Posted by Henning Koch to makandra dev (2011-08-30 12:17)

Fix: "undefined method `bytesize' for #<Array>"

Possible causes discovered by looking at the logs

Related cards:

See also

Be careful! The following solution will delete files on a volume. If you don't know exactly what you're doing, you can run into big trouble with your computer.

Be careful!
The following solution will delete files on a volume. If you don't know exactly what you're doing, you can run into big trouble with your computer.