Description of problem:
There appear to be two bugs with select in mksh on RedHat 7, neither of which happen in ksh93 or bash, nor do they happen with mksh on RedHat 6.

1. Per the mksh man page: "name is set to the selected word (or unset if the selection is not valid)". However, we are finding that it is NOT getting unset if the selection is invalid and non-numeric. Consider this:

 select var in a b c d ; do echo $var ; done

Make a valid selection (for instance 1) then make an invalid non-numeric selection (for instance @) and you will see that the value from your previous select is printed again. It should print a blank line.

2. The second one is more bizarre and problematic, and we may not have figured out the full details. It only seems to happen in a script. If you redirect a file descriptor on a prior command, name gets set to the selection in the list that corresponds to that file descriptor's number if the first item selected is invalid and non-numeric!

#!/bin/mksh
echo 2> /dev/null
select var in a b c d ; do echo $var ; done

Make that script and run it, then enter something non-numeric, such as @, and you will see it prints b rather than a blank line. Change 2> to 3> and it will print c, or change to 1> or simply > and it will print a.



Version-Release number of selected component (if applicable):
@(#)MIRBSD KSH R46 2013/05/02



How reproducible:
see above


Steps to Reproduce:
see above

Actual results:
see above

Expected results:
see above

Additional info: