Just one thing to check: you don’t happen to have a file called
“digest.rb” lying around in the current directory?
It’s tempting when writing a test program to exercise the digest library
to call it “digest.rb”. But then “require ‘digest’” will fail because it
will load the wrong file
One way to diagnose this is to find digest.so on your system (e.g.
“locate digest.so”) and then require it with a full path: e.g.
