For example, when debugging this webapp under WEBrick, the debugger always stops inside Rack or WEBRick code (e.g. in my case, rack-1.5.2/lib/rack/handler/webrick.rb).
require 'sinatra'
require 'debugger2'
get '/' do
debugger
'Hello'
end
Strangely, this does never happen when running exact the same app under Thin web server (but unfortunately, it DOES happen when debugging Rails apps under any sort of web server, which indeed is our major concern).
For example, when debugging this webapp under WEBrick, the debugger always stops inside Rack or WEBRick code (e.g. in my case, rack-1.5.2/lib/rack/handler/webrick.rb).
Strangely, this does never happen when running exact the same app under Thin web server (but unfortunately, it DOES happen when debugging Rails apps under any sort of web server, which indeed is our major concern).