"spring" shell script error on AIX Bash 4.3.0

[aivarsk]

spring-boot-project/spring-boot-cli/src/main/executablecontent/bin/spring has following weird commands:

	cd "$(dirname "${PRG}")/../" >&- || exit 1
	SPRING_HOME="$(pwd -P)"
	export SPRING_HOME
	cd "$SAVED" >&- || exit 1

If I understand bash correctly, ">&-" means to close stdout. I think a more typical approach is to redirect stdout to /dev/null. As a result, we have problems with Bash 4.3 running on AIX. Not sure if that's bash or AIX or combination of both but doing a redirect to /dev/null instead helps.

Here's how I reproduced the problem:

-bash-4.3$ bash --version
GNU bash, version 4.3.0(1)-release (powerpc-ibm-aix7.1.0.0)
Copyright (C) 2013 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-4.3$ cat a.sh
echo "`pwd`"
cd "`pwd`" >&-
echo "`pwd`"

-bash-4.3$ bash a.sh
/cspbd/64bit-powerpc-aix7.1-gcc4.8-ora12.1-tux12.1-s-rx13/cs.platform.WD2-1.13.1.3/src/cs.mp.vtis-0.0.25/spring-cloud-cli
a.sh: line 3: pwd: write error: A file descriptor does not refer to an open file.
a.sh: line 3: echo: write error: A file descriptor does not refer to an open file.
-bash-4.3$