Using ruby -rdebug, I put a breakpoint in at a line which used a bunch of other libraries.

But when I tried to output a variable using “p” the debugger said it was in a different file.

The consensus with -rdebug is that it’s pretty useless and unmaintained. Better is to use Pry.

Here’s the output I got:

debug.rb:130:in `eval’:undefined local variable or method `query’ for #