Unable to restore suspended function

Unable to restore suspended function

[Sean C. Farley]

I have a simple function to page output of ls.  With Zsh 5.8.1 (and 
earlier), I could suspend it then restore it with fg.  With Zsh 5.9, it 
enters some odd state where I have to call fg a few times before it 
exits (FreeBSD).  It never restores less.  I tested this with FreeBSD 
and Linux.  It works as expected with both FreeBSD's sh and bash.

Test environment (bare bones with no Zsh files in /tmp/zsh):
mkdir /tmp/zsh
env -i ZDOTDIR=/tmp/zsh TERM=${TERM} HOME=${HOME} USER=${USER} zsh
pll() { /bin/ls -lF "${@}" | less; }

Test output (FreeBSD):
% pll /tmp/zsh
total 0
(END)
---- Ctrl+z ----
zsh: done       /bin/ls -lF "${@}" |
zsh: suspended
% fg
[1]  + done       /bin/ls -lF "${@}" |
        continued
zsh: done                    /bin/ls -lF "${@}" |
zsh: suspended (tty output)
zsh: done                    /bin/ls -lF "${@}" |
zsh: suspended (tty output)
% fg
(END)zsh: done                   /bin/ls -lF "${@}" |
zsh: suspended (tty input)
zsh: done                   /bin/ls -lF "${@}" |
zsh: suspended (tty input)
% fg
[1]  + done       /bin/ls -lF "${@}" |
        continued
zsh: done                    /bin/ls -lF "${@}" |
zsh: suspended (tty output)
zsh: done                    /bin/ls -lF "${@}" |
zsh: suspended (tty output)
% fg
[1]  + done       /bin/ls -lF "${@}" |
        continued

Linux is similar but never exits.  It just outputs the "tty output" 
blocks each time fg is called.

Sean
-- 
sean+dev@farley.org

Re: Unable to restore suspended function

[Bart Schaefer]

On Thu, May 25, 2023 at 8:31 PM Sean C. Farley <sean+dev@farley.org> wrote:
>
> I have a simple function to page output of ls.  With Zsh 5.8.1 (and
> earlier), I could suspend it then restore it with fg.  With Zsh 5.9, it
> enters some odd state where I have to call fg a few times

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