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Home/ Questions/Q 6793747
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T18:08:14+00:00 2026-05-26T18:08:14+00:00

Possible Duplicate: Rails 3.1 and Ruby 1.9.3p125: ruby-debug19 still crashes with “Symbol not found:

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Possible Duplicate:
Rails 3.1 and Ruby 1.9.3p125: ruby-debug19 still crashes with “Symbol not found: _ruby_threadptr_data_type”

Just updated to 1.9.3-p0, updated all my gems and whatnot, but my application still cannot start.

Passenger error:

Error message:
dlopen(/Users/username/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle,
9): Symbol not found: _ruby_current_thread Referenced from:
/Users/username/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-    0.11.25/lib/ruby_debug.bundle 
Expected in: flat namespace in /Users/username/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle - /Users/username/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle

Exception class: LoadError

Any ideas?

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  1. Editorial Team
    Editorial Team
    2026-05-26T18:08:15+00:00Added an answer on May 26, 2026 at 6:08 pm

    Looks like a problem with ruby-debug. Look here for a possible fix:
    http://blog.wyeworks.com/2011/11/1/ruby-1-9-3-and-ruby-debug

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