Why would fish appear to ignore the second 'set' command in a function?

Question

When I run this function, JAVA_HOME gets set, JUG_BT_ARCH does not get set, and 'gello' gets echoed. I'm sure I'm missing something really obvious.

function j8
  set -x JAVA_HOME /Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/
  set -x JUG_BT_ARCH amd64-darwin11-xcode4
  echo gello
end

Answer 1

Variables by default have function-scope, so when the function ends, they go away. You can make them global via --global or -g:

set -gx JUG_BT_ARCH amd64-darwin11-xcode4

Now when you run the function, this variable will stick around.