Re: triggering of ERR trap differs between bash 3.2.39 & 4.0.28

[Chet Ramey]

> Ok. Same here. (4.0.35 is not yet stable on my distro, gentoo, hence I 
> quoted results with 4.0.28).

But I can't reproduce it with bash-4.0.28, either:

$ ./bash --version
GNU bash, version 4.0.28(2)-release (i386-apple-darwin9.8.0)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
$ ./bash -xc 'set -eE;on_error() { echo ERROR ERROR; };trap on_error ERR;if [ 
-n "$(echo $0 |grep a)" ];then echo "input contains 'a'";fi' a
+ set -eE
+ trap on_error ERR
++ echo a
++ grep a
+ '[' -n a ']'
+ echo 'input contains a'
input contains a
$ ./bash -xc 'set -eE;on_error() { echo ERROR ERROR; };trap on_error ERR;if [ 
-n "$(echo $0 |grep a)" ];then echo "input contains 'a'";fi' b
+ set -eE
+ trap on_error ERR
++ echo b
++ grep a
+ '[' -n '' ']'


-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/