bug#59650: 29.0.50; Eshell: Non-idempotent behavior of undefined commands

[Milan Zimmermann <milan.zimmermann@gmail.com>]

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I am reporting this realizing, this non-idempotent behavior will likely
not be considered a bug.

However, in a scripting language, when one would want to use scripts not
attended, it is disturbing (at least, to me).

Try any command that does not exist, four (4) times. The first three
times, we get "Command not found". The fourth time, we are prompted for
an alias. This is not desirable. If anything, why not ask the first time?

========================
~/tmp $ 1
1: command not found
~/tmp $ 1
1: command not found
~/tmp $ 1
1: command not found
~/tmp $ 1 ### Prompt: Define alias for "1"
========================

Is there a way to change this, to never ask for an alias? I
apologize if I missed some customization, I did look quite a bit.


Addendum:
=================================
I also offer this slant on the issue:

~/tmp $ if ${> 3 1} {echo "FIRST"} {echo "SECOND"}
FIRST
~/tmp $ if ${> 3 1} {echo "FIRST"} {echo "SECOND"}
FIRST
~/tmp $ if ${> 3 1} {echo "FIRST"} {echo "SECOND"}
FIRST
~/tmp $ if ${> 3 1} {echo "FIRST"} {echo "SECOND"} ###  Prompt: Define
alias for "nil"


This actually shows a bug in the conditionals. I assume the test returns
nil which for some reason is, on the 4th attempt to considered a
command?

Maybe it is confused because of this behavior:

~/tmp $ if ${< 3 1} {echo "FIRST"} {echo "SECOND"}
Eshell does not support input redirection

and same here:

~/tmp $ if {< 3 1} {echo "FIRST"} {echo "SECOND"}
Eshell does not support input redirection

I assume all this should be reported as a separate bug?

Thanks
Milan


In GNU Emacs 29.0.50 (build 1, x86_64-suse-linux-gnu, GTK+ Version
3.24.34, cairo version 1.17.6)
System Description: openSUSE Tumbleweed

Configured using:
 'configure --host=x86_64-suse-linux-gnu --build=x86_64-suse-linux-gnu
 --program-prefix= --disable-dependency-tracking --prefix=/usr
 --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin
 --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include
 --libdir=/usr/lib64 --libexecdir=/usr/libexec --localstatedir=/var
 --sharedstatedir=/var/lib --mandir=/usr/share/man
 --infodir=/usr/share/info --disable-build-details --without-pop
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 --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share
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 --libexecdir=/usr/libexec --with-file-notification=yes
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 -Werror=return-type -flto=auto -D_GNU_SOURCE
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 LDFLAGS=-flto=auto'

Configured features:
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LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 MODULES NOTIFY INOTIFY
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Important settings:
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Major mode: Eshell

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Load-path shadows:
None found.

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Memory information:
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