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I have a complex ksh environment that I have built over 40 years and
it's worked fine (with occasional tweaks) on most systems (SunOS,
Solaris, BSD, HP-UX, AIX, NCR, many Linux versions). I just upgraded to
kubuntu 20.04 and my 'xterm -ls' windows failed to open because the
shell was crashing. I reverted to ksh93 and it worked again. Errors with
ksh2020 were false reports of mismatched single or double quotes, among
others. I stripped down my environment and managed to use 2020. But when
I run some functions, it still blows up. I ran it with 'valgrind'
(something that every single app should be run with before any release,
especially a shell!) and it came up with hundreds of errors. Ksh93 only
has a handful. Valgrind output is attached. My environment is probably
too big to share with you but fixing all the glaring issues exposed by
valgrind may resolve my problems. For now, I am back on ksh93.
** Affects: ksh (Ubuntu)
Importance: Undecided
Status: New
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ksh2020 has massive memory issues
https://bugs.launchpad.net/bugs/1887863
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