ruby can't rescue or see abort from Thread.abort_on_exception

Question

I need to immediately catch exceptions in threads and stop all threads, so I'm using abort_on_exception in my script. Unfortunately this means the exception is not raised to the parent thread - perhaps this is because the exception ends up happening in a global scope??

Anyways, here's an example showing the issue:

Thread.abort_on_exception = true

begin
  t = Thread.new {
    puts "Start thread"
    raise saveMe
    puts "Never here.."
  } 
  t.join
rescue => e
  puts "RESCUE: #{e}"
ensure
  puts "ENSURE"
end

How can I rescue that exception that's raised in the thread when using abort_on_exception?

Here's a new example that shows something even more boggling. The thread is able to kill execution inside the begin block, but it does it without raising any exceptions??

Thread.abort_on_exception = true
begin
  t = Thread.new { raise saveMe }                     
  sleep 1
  puts "This doesn't execute"
rescue => e 
  puts "This also doesn't execute"
ensure
  puts "But this does??"
end   

Answer 1

Ah - I figured it out.

The abort_on_exception send, obviously, an abort. The thread is irrelevant, our rescue won't see a basic abort either:

begin
  abort
  puts "This doesn't execute"
rescue => e
  puts "This also doesn't execute"
ensure
  puts "But this does??  #{$!}"
end   

The solution is to use a 'rescue Exception' which also catches the abort.

begin
  abort
  puts "This doesn't execute"
rescue Exception => e
  puts "Now we're executed!"
end