I just updated Ruby in my application from 2.1.2 to 2.4.4 and am now 
receiving the same errors. Using Rails 3.2.22.5 and have not changed that. 
Maybe that could help you figure it out. Also looking into it right now so 
please let me know if you do! 

On Friday, May 25, 2018 at 2:37:17 AM UTC-4, Timor Tsentsiper wrote:
>
> I Just upgraded old rails app (3.2.22) to rails 4.2.10 and I am not sure 
> if this is the right place but after a few hours of research, I am a little 
> stumped. BRAND NEW rails 4.2.10 (same ruby) projects work (the behavior 
> below does not happen) but this upgraded project fails on any instance of 
> the ActiveSupport:: Duration functions. Did I miss something in the 
> upgrade? Is it a gem issue? load order?
>
> its not just Fixnum its any of these ActiveSupport::Duration functions
> Expected behavior
>
> irb(main):001:0> 20.days
> => 20 days
> irb(main):002:0> 20.days.from_now
> => Wed, 13 Jun 2018 22:35:42 UTC +00:00
>
> Actual behavior
>
> irb(main):003:0> 20.days
> TypeError: ActiveSupport::Duration can't be coerced into Fixnum
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/core_ext/numeric/time.rb:35:in
>  `*'
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/core_ext/numeric/time.rb:35:in
>  `days'
>       from (irb):3
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.10/lib/rails/commands/console.rb:110:in
>  `start'
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.10/lib/rails/commands/console.rb:9:in
>  `start'
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:68:in
>  `console'
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:39:in
>  `run_command!'
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.10/lib/rails/commands.rb:17:in
>  `<top (required)>'
>       from bin/rails:4:in `require'
>       from bin/rails:4:in `<main>'
> irb(main):004:0> 20.days.from_now
> TypeError: ActiveSupport::Duration can't be coerced into Fixnum
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/core_ext/numeric/time.rb:35:in
>  `*'
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/core_ext/numeric/time.rb:35:in
>  `days'
>       from (irb):4
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.10/lib/rails/commands/console.rb:110:in
>  `start'
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.10/lib/rails/commands/console.rb:9:in
>  `start'
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:68:in
>  `console'
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:39:in
>  `run_command!'
>       from 
> /Users/ttsentsiper/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.10/lib/rails/commands.rb:17:in
>  `<top (required)>'
>       from bin/rails:4:in `require'
>       from bin/rails:4:in `<main>'
>
> System configuration
>
> Rails version: 4.2.10
>
> Ruby version: ruby 2.3.1p112
>
> I also tried upgrading to ruby 2.4 on the same project and the issue 
> persists (seems not ruby related)
> Also copied the gemfile from the project that does not work into a new 
> project and things seem ok
>

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