When variable PWD changed, the behavior of pwd is unspecified
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/pwd.html#tag_20_97_08
-- Mr. LE Manh CuongMobile: +84 1216 181090Skype: manhcuongle> From:
446240...@qq.com
> Subject: `pwd' returns a dot
> Date: Wed, 16 Sep 2015 15:51:08 +08
Bash will report error if you define function, which named the same as special
builtin commands, in POSIX mode:
$ bash --norc --posix$ bash-4.3$ eval() { echo func;}bash: `eval': is a special
builtin
The problem here is bash doesn't forget those type of functions if they were
defined before POSI
