bash trap debug failure

This program (debug shell) works only if you run it like this:

debug_shell script.sh

If you have a script like this:

#!/bin/debug_shell
echo my program

Then it doesn't work.

Source for the "debug_shell":

#!/bin/bash
shopt -s extdebug
function on_debug {
  echo HERE:  $BASH_ARGV
}
t开发者_开发百科rap on_debug DEBUG
. $1

Any idea why it doesn't work (bash 3.2.25)?

Ensure that debug_shell and script.sh have executable bit. Also it's important how you run your script:

$ ./script.sh
HERE: ./script.sh
my program

On my ubuntu 10.04 bash 4.1.5, your stuff works fine.

Are you sure your script.sh is executable ? And be sure you stored the debug_script in /bin of course ;)