Unexpected behavior with “set -o errexit” on AIX

[RemyJ]

This script shell works fine on GNU/Linux but not on AIX 5.3 and later :

#!/bin/sh

echo $SHELL

set -o nounset -o errexit

[ 1 -eq 1 ] && {
  echo "zzz"
} && echo "aaa" && [ 1 -eq 0 ] && echo "bbb"
echo "ccc"

On GNU/Linux, I've got the expected output :

/bin/bash
zzz
aaa
ccc

On AIX, I've got this one :

/bin/ksh
zzz
aaa

Without "set -o nounset -o errexit" it works fine... I don't understant why. Could you explain me what is wrong in my script shell.

man ksh :

-e
Executes the ERR trap, if set, and exits if a command has a nonzero exit status, unless in the following conditions:
* The simple command is contained in a "&&" or "||" list.
* The simple command immediately follows "if", "while" or "until".
* The simple command is contained in a pipeline following "!".
This mode is disabled when profiles are read.

In my example, the second test "[ 1 -eq 0 ]" is part of an AND, so I should see the output "ccc". This test returns 1, it traps the output "bbb", but should'nt exit the script.

Thanks

Rémy