If you `source` another file, `trap INT` defined before won't work?

Question

If I place this on the top the Bash script, Control+C doesn't work.

exit-function() {
  echo "Hey hey!"
}    
trap exit-function INT

But if I put it few lines after, then Control+C is trapped.

UPDATE:

If it's placed after source "$HOME/.rvm/scripts/rvm", then it works.

So if you source another file, trap INT defined before won't work?

Answer 1

One of the scripts that's sourced by the rvm script sets a trap which replaces the trap you set earlier. By setting one after the rvm script you're replacing the one it sets.