source: trunk/essentials/app-shells/bash/tests/trap2.sub

set +e
trap 'echo ERRTRAP' ERR

false
false
false

echo after falses

if ! false; then
        echo if negation ok
fi

! false
echo after negation 

while false; do
        echo while negation ok
done

echo after while

./trap2a.sub

echo $(false ; echo command substitution)