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Description of problem:

KSH script execution fails with “sort: sort: cannot execute [Exec format error]”

$ find . | sort > /work/$(date +%Y%m%d)_$(date +%Y%m%d)
sort: sort: cannot execute [Exec format error]

Version-Release number of selected component (if applicable):

RHEL 8.5
ksh-20120801-254.el8.x86_64

How reproducible:

RHEL 8.5
==========

Steps to Reproduce:
1. Make sure user has permission to write in /work
2. Start ksh session
$ ksh
3. Run the command:
$ find . | sort > /work/$(date +%Y%m%d)_$(date +%Y%m%d)

Actual results:

$ find . | sort > /work/$(date +%Y%m%d)_$(date +%Y%m%d)
sort: sort: cannot execute [Exec format error]

Expected results:
no error output

Additional info: 

change the command to the following, sometimes works, sometimes not.

$ find . | sort > /work/$(date +%Y%m%d)_20211228

~~~
$ find . | sort > /work/$(date +%Y%m%d)_20211228
sort: sort: cannot execute [Exec format error]
$ find . | sort > /work/$(date +%Y%m%d)_20211228
$ find . | sort > /work/$(date +%Y%m%d)_20211228
$ find . | sort > /work/$(date +%Y%m%d)_20211228
sort: sort: cannot execute [Exec format error]
~~~

Workaround:

$ today=$(date +%Y%m%d)_$(date +%Y%m%d)
$ find . | sort > /work/$today

Fix for this is same as in: https://bugzilla.redhat.com/show_bug.cgi?id=1857847.

Upstream commit: https://github.com/ksh93/ksh/commit/f207cd57.

ahem, shouldn't this be marked as duplicate of #1857847 ?

I think so.  Both the bugs refer to the same upstream fix.

*** This bug has been marked as a duplicate of bug 1857847 ***