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Re: [bug] PROMPT_COMMAND is not executed as expected in some situations

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(found this thread as I was about to report the same issue around
edit-and-execute-command)

On Wednesday, April 15, 2020 at 2:35:39 PM UTC-7, Chet Ramey wrote:
> On 4/15/20 2:59 PM, Franklin, Jason wrote:
> > I have discovered that PROMPT_COMMAND is not executed before the
> > printing of PS1 in the following three situations:
> PROMPT_COMMAND is printed before PS1 when the shell goes to read a command.
> (When you're using readline, readline prints the prompt initially, but
> PROMPT_COMMAND works whether you're using editing or not.) That isn't true
> in any of these cases.
[...]
> In cases 1 and 3, that all takes place within a single call to readline(),
> even before the shell receives and tries to parse any of the line.

For the case of:
$ PROMPT_COMMAND='echo "last command was: $(history 1)"'
$ echo hello
hello
last command was: 39744  echo hello
$ <c-x c-e>echo hello2<c-x c-s c-x c-c>
echo hello2
hello2
$

Are you saying that the last line ("$ ") is printed as part of the same call
to readline that emitted the previous ("$ ")?

Unsure if related, but also quite confusing that $? doesn't hold the exit status of commands run through edit-and-execute-command:

$ <c-x c-e>false<c-x c-s c-x c-c>
false
~ $ echo $?
0

Cheers,
-a

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Re: [bug] PROMPT_COMMAND is not executed as expected in some situations Chet Ramey <chet.ramey@case.edu> - 2020-04-15 17:35 -0400
  Re: [bug] PROMPT_COMMAND is not executed as expected in some situations ami@fischman.org - 2020-04-18 13:59 -0700

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