I know the debugger gem is not compatible yet with ruby 2.0 See here
In the changelog of ruby 2.0, we can see this :
DTrace support, which enables run-time diagnosis in
production TracePoint, which is an improved tracing API
So my question is, is there something out of the box for debugging with ruby 2.0 ? Can somebody explain this to me?
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The version 1.4.0 of the debugger gem now installs without problems.
There are still some issues but this should be fixed soon.
The debugger gem does not play well with ruby 2, install the gem byebug that is fully compatible with ruby 2.
Gem debugger can be used but it still has issues.
Install gem byebug (written for ruby 2.0 debugging)
And for breakpoints, use byebug command in your code instead of debugger.
Use pry (pryrepl.org).
gem install pry
gem install pry-debugger
As Alain said the gem byebug should do the trick, the only thing is you might have to also add require ‘byebug’ to the top of the file you want to debug.