Old bash version 4.3.30 does not include readarray -d option

When trying to run the test script BaHaMAS_tests.bash on the gsi-cluster this error occurred:

./BaHaMAS_tests.bash: line 157: readarray: -d: invalid option
readarray: usage: readarray [-n count] [-O origin] [-s count] [-t] [-u fd] [-C callback] [-c quantum] [array]

and some more output-lines from BaHaMAS. It seems that the bash version 4.3.30 on the gsi-cluster does not have this -d option for readarray yet. On my home-PC with bash version 5.0.16 it is available.

I don't know if there are other places in the code where it is dependendent on a newer bash version, but this was the first place, where this became obvious.