Bash: trap vs. tee

["Stefan Schmidt" <Stefan.Schmidt@gmx.net>]

Hello,

I have a bash script with trap, but the trap doesn't catch the error.

function handle {
echo "This should be reached
exit 1
}
trap handle ERR
ls nonexist | tee -a output.log
echo "This should not be reached"

outputs

ls: nonexist: No such file or directory
This should not be reached

How come?

Stefan